Seminari 2015
from
Thursday, 1 January 2015 (08:00)
to
Thursday, 31 December 2015 (18:00)
Monday, 29 December 2014
Tuesday, 30 December 2014
Wednesday, 31 December 2014
Thursday, 1 January 2015
Friday, 2 January 2015
Saturday, 3 January 2015
Sunday, 4 January 2015
Monday, 5 January 2015
Tuesday, 6 January 2015
Wednesday, 7 January 2015
Thursday, 8 January 2015
Friday, 9 January 2015
Saturday, 10 January 2015
Sunday, 11 January 2015
Monday, 12 January 2015
Tuesday, 13 January 2015
Wednesday, 14 January 2015
Thursday, 15 January 2015
Friday, 16 January 2015
Saturday, 17 January 2015
Sunday, 18 January 2015
Monday, 19 January 2015
Tuesday, 20 January 2015
Wednesday, 21 January 2015
Thursday, 22 January 2015
Friday, 23 January 2015
Saturday, 24 January 2015
Sunday, 25 January 2015
Monday, 26 January 2015
Tuesday, 27 January 2015
Wednesday, 28 January 2015
Thursday, 29 January 2015
15:00
Renaissance in Astrophysics: the primordial stars
-
Pascal Chardonnet
(
Université de Savoie, Annecy (France)
)
Renaissance in Astrophysics: the primordial stars
Pascal Chardonnet
(
Université de Savoie, Annecy (France)
)
15:00 - 16:00
Room: stanza 412, blocco C
Abstract The last « Terra incognita » of our Universe is usually called the dark age. It ends with the most powerful fireworks of the universe: the creation of the first stars. With them our Universe changes drastically. According to theoretical models, massive stars with masses within the 100- 250 solar mass range should explode as pair-instability supernovae (PISNe). Since the first stars of the Universe are believed to be very massive, these supernovae should play a signicant role in the early stages of its history. But these stars represent the last unobserved population, owing to detection limits of current telescopes. In this presentation, we analyze pair-instability supernovae explosions using various numerical codes. We evolve series of configurations of oxygen cores to establish a range of masses and initial conditions where this type of explosion is possible. We also study the role of possible instabilities in the propagation of shockwaves during the last stage of the explosion. This investigation could help us to predict the observational properties of PISNe for future space and ground telescopes and the possible connections with Gamma-Ray Bursts
Friday, 30 January 2015
Saturday, 31 January 2015
Sunday, 1 February 2015
Monday, 2 February 2015
15:00
Ultra-sensitive length measurement: Gravitational wave detectors and what they might be good for.
-
Hartmut Grote
(
Albert Einstein Institute (MPI) Hannover
)
Ultra-sensitive length measurement: Gravitational wave detectors and what they might be good for.
Hartmut Grote
(
Albert Einstein Institute (MPI) Hannover
)
15:00 - 16:00
Room: stanza 412, blocco C
A world-wide effort is under way to make the first direct detection of gravitational waves, which were predicted by Einstein a century ago. The establishment of gravitational wave astronomy is expected to follow. Gravitational waves are distortions of space-time, travelling at the speed of light, which can be detected with ultra-sensitive length measurements. I will introduce the basic functionality of laser interferometers built for this purpose, which are able to measure length fluctuations 100000 times smaller than the diameter of a proton. I will further give an overview of the different detectors around the globe. In the last third of the talk I will present recent thoughts on how these gravitational wave detectors might be used to also attempt a measurement of vacuum birefringence.
Tuesday, 3 February 2015
Wednesday, 4 February 2015
Thursday, 5 February 2015
Friday, 6 February 2015
Saturday, 7 February 2015
Sunday, 8 February 2015
Monday, 9 February 2015
Tuesday, 10 February 2015
Wednesday, 11 February 2015
Thursday, 12 February 2015
Friday, 13 February 2015
Saturday, 14 February 2015
Sunday, 15 February 2015
Monday, 16 February 2015
Tuesday, 17 February 2015
Wednesday, 18 February 2015
Thursday, 19 February 2015
15:00
Running in the Dark: numerical simulations of non-standard Dark Matter and Dark Energy cosmologies
-
Marco Baldi
(
Universita-INAF-INFN Bologna
)
Running in the Dark: numerical simulations of non-standard Dark Matter and Dark Energy cosmologies
Marco Baldi
(
Universita-INAF-INFN Bologna
)
15:00 - 16:00
Room: stanza 412, blocco C
Structure formation represents one of the most promising observational targets to shed some light on the longstanding mysteries about the composition of about 95% of the energy density in the Universe. In fact, although the standard cosmological picture - the LCDM model - provides a simple framework to encompass most of the available data, the fundamental nature of its main pillars (the cosmological constant Lambda and the Cold Dark Matter particle) is still unknown and its theoretical foundations suffer from multiple "naturalness" problems. In such a context, a wide range of possible alternative theories for both the Dark Energy and the Dark Matter components of the Universe have been proposed. A systematic and robust scrutiny of such wide landscape of non-standard cosmological models can be performed only by combining information from both linear and non-linear scales, thereby requiring the use of numerically demanding computer simulations. In this talk I will provide a general overview on numerical simulations of structure formation in non-standard cosmological models. I will then discuss a few key results obtained with some of the largest N-body runs to date for various popular cosmological models beyond LCDM, as e.g. the interacting Dark Energy, Modified Gravity, and Dark Scattering scenarios. Finally, I will discuss how the issue of Cosmic Degeneracies (i.e. the combined effects of multiple and mutually independent extensions of the standard model) might significantly degrade the discriminating power of present and future cosmological surveys. In particular, the combination of "reasonable" non-standard models for both Dark Energy and Dark Matter might conspire to substantially mask their individual observational footprints. Breaking such possible degeneracies represents a new challenge on our path towards percent precision measurements in cosmology.
Friday, 20 February 2015
Saturday, 21 February 2015
Sunday, 22 February 2015
Monday, 23 February 2015
Tuesday, 24 February 2015
Wednesday, 25 February 2015
15:00
The JUNO experiment: entering the era of precision neutrino physics
-
Marco Grassi
(
PI
)
The JUNO experiment: entering the era of precision neutrino physics
Marco Grassi
(
PI
)
15:00 - 16:00
Room: stanza 412, blocco C
The first unexplained evidence of neutrino oscillation dates back to the late 60s, and it took more than 30 years before the SNO experiment solved the Solar Neutrino Problem by proving the existence of neutrino flavor change. Nowadays we know many of the neutrino mixing parameters with a precision of few percent, but several theoretical issues are still waiting to be settled. Determining the neutrino mass hierarchy and probing the unitarity of the PMNS matrix are among the most important ones. The JUNO experiment is a liquid scintillator detector aiming at collecting a large (O(105)) sample of antineutrinos from reactors at a baseline of 53km. Its unprecedented target mass (20kt), photo-coverage (75%), and light yield make it a high resolution (3%/√E) antineutrino calorimeter, sensitive to the interference between the solar and the atmospheric mass splittings. Such sensitivity is the gateway to finally determine the neutrino mass hierarchy and to push the uncertainties of sin2(θ12), Δm212 and Δm223 below 1%, hence moving the first steps towards probing the PMNS unitarity. The seminar focuses on both the scientific goals and the experimental challenges of the JUNO experiment, providing also some insight into the R&D activities and the fast-growing international collaboration.
Thursday, 26 February 2015
11:30
Theoretical and phenomenological considerations about radiation by relativistic electrons in matter or in external fields
-
Xavier Artru
(
Université Lyon-1, CNRS/IN2P3, IPNL
)
Theoretical and phenomenological considerations about radiation by relativistic electrons in matter or in external fields
Xavier Artru
(
Université Lyon-1, CNRS/IN2P3, IPNL
)
11:30 - 12:30
Room: stanza 412, blocco C
Most known examples of radiation by relativistic electrons in matter, near matter or in external field are 1) Bremsstrahlung, Synchrotron Radiations, 2) Channeling, Transition, Diffraction, Smith-Purcell Radiation, Parametric X-rays and Compton back-scattering. Their common and separate properties and their calculation methods are reviewed, in particular : coherence length, infrared divergence, equivalent photon picture, quantum recoil in strong QED fields, Baier-Katkov formula, photon impact parameter.
15:00
Invarianza T ( inversione temporale ) in meccanica classica e quantistica
-
Luca Caneschi
(
Universita' di Ferrara
)
Invarianza T ( inversione temporale ) in meccanica classica e quantistica
Luca Caneschi
(
Universita' di Ferrara
)
15:00 - 16:00
Room: stanza 412, blocco C
Si studiano le proprietà dell'operatore T in meccanica classica e quantistica ( livello laurea triennale )
16:00
Invarianza T in teoria dei campi e fisica delle particelle
-
Luca Caneschi
(
Universita' di Ferrara
)
Invarianza T in teoria dei campi e fisica delle particelle
Luca Caneschi
(
Universita' di Ferrara
)
16:00 - 17:00
Room: stanza 412, blocco C
Si studiano le proprietà dell'operatore T in teoria dei campi e in fisica delle particelle. Si esamina la situazione sperimentale relativa alla possibile rottura di T ( livello laurea magistrale- dottorato )
Friday, 27 February 2015
Saturday, 28 February 2015
Sunday, 1 March 2015
Monday, 2 March 2015
Tuesday, 3 March 2015
15:00
La biofisica di un fisico (ma anche di altri soggetti…)
-
Giorgio Rispoli
(
Universita' di Ferrara, Dipartimento di Scienze della Vita e Biotecnologie
)
La biofisica di un fisico (ma anche di altri soggetti…)
Giorgio Rispoli
(
Universita' di Ferrara, Dipartimento di Scienze della Vita e Biotecnologie
)
15:00 - 16:00
Room: stanza 412, blocco C
Quali sono i meccanismi fisici alla base della formazione dei segnali elettrici nei neuroni, i quali, connessi tra loro opportunamente, formano una rete (il sistema nervoso) in grado di percepire il mondo esterno, di interpretarlo, di ricordarlo, di sognarlo, di raccontarlo ad altre reti, conscia di farlo? E a che le serve saperlo?
Wednesday, 4 March 2015
Thursday, 5 March 2015
Friday, 6 March 2015
Saturday, 7 March 2015
Sunday, 8 March 2015
Monday, 9 March 2015
Tuesday, 10 March 2015
Wednesday, 11 March 2015
Thursday, 12 March 2015
Friday, 13 March 2015
Saturday, 14 March 2015
Sunday, 15 March 2015
Monday, 16 March 2015
14:30
Phenomenology of low-energy flavour models: rare processes and dark matter
-
Lorenzo Calibbi
(
Universita' di Bruxelles
)
Phenomenology of low-energy flavour models: rare processes and dark matter
Lorenzo Calibbi
(
Universita' di Bruxelles
)
14:30 - 15:30
Room: stanza 018, Museo, blocco C
In this seminar, I will first review the main features of models of fermion masses and mixing based on new symmetries of flavour. I will then discuss how light the new flavour dynamics is allowed to be by the constraints from flavour-changing processes and possible UV completions of this kind of models. In the second part of the seminar, I will introduce dark matter (DM) as a fermionic singlet under the Standard Model (SM) gauge group that is however charged under the flavour symmetry. Interactions between DM and SM particles are then only mediated by the scalar fields that spontaneously break the flavour symmetry, the so-called flavons. In the case of gauged flavour symmetries, the interactions are also mediated by the flavour gauge bosons. I will discuss the construction and the generic features of this class of models and then the phenomenology of an explicit example.
Tuesday, 17 March 2015
Wednesday, 18 March 2015
Thursday, 19 March 2015
Friday, 20 March 2015
Saturday, 21 March 2015
Sunday, 22 March 2015
Monday, 23 March 2015
Tuesday, 24 March 2015
15:00
New limits on non-linear QED and axions from the PVLAS experiment
-
Guido Zavattini
(
Universita' e INFN Ferrara
)
New limits on non-linear QED and axions from the PVLAS experiment
Guido Zavattini
(
Universita' e INFN Ferrara
)
15:00 - 16:00
Room: stanza 412, blocco C
A new highly sensitive ellipsometer is now running at the Department of Physics and INFN of Ferrara, Italy. The apparatus has been designed to detect very small magnetically induced birefringences with the ultimate goal of measuring vacuum magnetic birefringence, an effect directly related to light-light interaction. This challenging goal is not yet achievable due to excess noise which is under study. Nonetheless a new limit on vacuum magnetic birefringence has been recently set. Taking advantage of the cavity intrinsic birefringence, our ellipticity limit can also be used to set a dichroism limit. From these two values we also set model independent limits on the coupling constant of axion like particles to two photons.
Wednesday, 25 March 2015
10:00
Silicon Pore Optics: from the Athena mirrors to Laue lenses
-
Nicolas Barriere
(
Scientist - X-ray optics Specialist, Cosine Measurement Systems, Leiden, The Netherlands
)
Silicon Pore Optics: from the Athena mirrors to Laue lenses
Nicolas Barriere
(
Scientist - X-ray optics Specialist, Cosine Measurement Systems, Leiden, The Netherlands
)
10:00 - 11:00
Room: Museo -- Stanza C 018
Silicon Pore Optics (SPO) is a technology based on direct bonding of super-polished Si plates that enables lightweight and accurate Wolter-I type X-ray optics. Developed by Cosine, SPO has been adopted by the European Space Agency for the Athena mission, allowing the realization of its 2 m^2 effective area (at 1 keV) and 3-5 arc seconds angular resolution in a 0.1-15 keV bandpass. At higher energy, in the soft gamma-ray domain, a Laue lens telescope could efficiently complement wide field of view instruments by providing enhanced sensitivity and angular resolution in a selection of relatively narrow energy bands. Cosine, in collaboration with the University of California at Berkeley, has been developing the first Silicon Laue Components (SiLCs), a concept directly derived from the SPO technology. It results in self-standing diffracting elements that focus both radially and azimuthally. I will first review the SPO concept and present the state of the art of its development, and I will then present the development status of SiLCs, and refined estimates of the performance they could deliver based on experimental results.
Thursday, 26 March 2015
Friday, 27 March 2015
Saturday, 28 March 2015
Sunday, 29 March 2015
Monday, 30 March 2015
Tuesday, 31 March 2015
Wednesday, 1 April 2015
Thursday, 2 April 2015
Friday, 3 April 2015
Saturday, 4 April 2015
Sunday, 5 April 2015
Monday, 6 April 2015
Tuesday, 7 April 2015
Wednesday, 8 April 2015
Thursday, 9 April 2015
12:00
"Gamma Ray Burst Physics with the Liverpool Telescope and LCOGTN"
-
Andreja Gomboc
(
Faculty of Mathematics and Physics, University of Ljubljana, Slovenia
)
"Gamma Ray Burst Physics with the Liverpool Telescope and LCOGTN"
Andreja Gomboc
(
Faculty of Mathematics and Physics, University of Ljubljana, Slovenia
)
12:00 - 13:00
Room: aula 100, Blocco C
I will review recent results of the international team using the Liverpool Telescope and the LCOGTN to observe GRBs’ optical afterglows to study their behaviour in the first minutes to hours after the GRB trigger, thus shedding the light on their physics. Rapid multi-band photometric observations in combination with high-energy data from satellites reveal origin of optical flares occurring contemporaneously with prompt gamma-ray emission and enable statistical studies of GRBs with and without the reverse shock optical emission. However, one of the most important questions of GRB physics is the role of the magnetic field, which can be addressed by measuring linear polarisation of an early optical afterglow. Using the RINGO 2 polarimeter on the Liverpool Telescope we showed in the case of the GRB 120308A that large scale ordered magnetic fields are present in these explosions.
Friday, 10 April 2015
15:00
Now you see it, now you don’t - the rapid cycle of BH accretion phases
-
Lia Sartori
(
ETH Zürich (Institute for Astronomy)
)
Now you see it, now you don’t - the rapid cycle of BH accretion phases
Lia Sartori
(
ETH Zürich (Institute for Astronomy)
)
15:00 - 16:00
Room: stanza 412, blocco C
The study of AGN variability on timescales longer than human lifetimes can provide important information about the black hole – host galaxy interaction and coevolution. The discovery of an extended emission line region (EELR) associated with the nearby galaxy IC 2497, the so-called “Hanny’s Voorwerp” (HV), provided us with a laboratory to study AGN variability over 100 kyr timescales. HV was illuminated by a strong quasar, but the quasar in IC 2497 significantly shut down in the last 200 kyrs. Thanks to its recent death, we can now explore the host galaxy unimpeded by the presence of a quasar dominating the observations. On the other hand, the Voorwerp preserves the echoes of its past activity. Citizen scientists taking part in the Galaxy Zoo project assembled a sample of low-redshift galaxies showing EELRs similar to HV. In this talk I will show how these objects can help us understand what happens when a quasar shut down and its accretion state changes, and ultimately what effect this could have on the host galaxy.
Saturday, 11 April 2015
Sunday, 12 April 2015
Monday, 13 April 2015
15:00
PADME: ricerca di dark photons alla BTF di Frascati
-
Paolo Valente
(
ROMA1
)
PADME: ricerca di dark photons alla BTF di Frascati
Paolo Valente
(
ROMA1
)
15:00 - 16:00
Room: stanza 412, blocco C
Molte estensioni dello Standard Model prevedono particelle vettoriali (bosoni U o fotoni pesanti o dark photons) con interazioni simili a quelle dei fotoni, che possono essere prodotte in associazione ai fotoni. L’esperimento PADME si propone di cercare tali particelle in processi e+e−→Uγ, U→invisibile nell’interazione di un fascio di positroni con gli elettroni di un bersaglio sottile, utilizzando il fascio del linac di DAFNE estratto sulla linea della Beam-Test Facility (BTF) ai Laboratori Nazionali di Frascati, INFN. Conoscendo l'impulso del fascio incidente e misurando con precisione quello del fotone con un calorimetro opportunamente segmentato, è possibile chiudere la cinematica e effettuare una ricerca model-independent studiando la massa mancante. Per questo tipo di ricerca inclusiva non esistono, ad oggi, risultati sperimentali. Con il fascio di positroni di 550 MeV attualmente disponibile, sarebbe possibile ottenere un'esclusione della regione fino a 23 MeV di massa e 10^-6 nell'accoppiamento (alpha'/alpha) con un anno di presa dati (4x10^13 eot). Eventuali upgrade in energia del linac sarebbero utili a estendere la sensibilità dell’esperimento. Per sfruttare la produzione di dark photon in processi di Bremsstrahlung ed il loro successivo decadimento in coppie di leptoni U → e+e− l'esperimento viene completato da uno spettrometro magnetico. E' possibile migliorare le esclusioni attuali anche estraendo il fascio del linac alla massima intensità su un bersaglio spesso tipo dump. Si puo' cercare sia l'apparizione di coppie di leptoni dopo i dump, sia lo scattering con i nuclei di particelle di dark matter leggere derivanti da decadimenti invisibile del dark photon in un rivelatore dedicato.
Tuesday, 14 April 2015
Wednesday, 15 April 2015
Thursday, 16 April 2015
Friday, 17 April 2015
Saturday, 18 April 2015
Sunday, 19 April 2015
Monday, 20 April 2015
Tuesday, 21 April 2015
Wednesday, 22 April 2015
Thursday, 23 April 2015
Friday, 24 April 2015
Saturday, 25 April 2015
Sunday, 26 April 2015
Monday, 27 April 2015
Tuesday, 28 April 2015
15:30
The First Cosmological Simulations of Coherent Bosonic Dark Matter for the "Post-WIMP Era"
-
Tom Broadhurst
(
University of Basque Country , Bilbao
)
The First Cosmological Simulations of Coherent Bosonic Dark Matter for the "Post-WIMP Era"
Tom Broadhurst
(
University of Basque Country , Bilbao
)
15:30 - 16:30
Room: stanza 412, blocco C
Heavy particles are not the only interpretation for the observed coldness of dark matter - here I present cosmological simulations of a cold Bose-Einstein state, revealing an unknown world of non-linear wave structures that distinguish this physically well motivated state from standard particle CDM. The key predictions are made with GPU optimised AMR evolution of coupled Schrodinger-Poisson equations, finding solitonic cores and a granular structure within virialised halos. Comparison with the latest Hubble Frontier Field galaxies that we have detected at high redshift favours this interpretation, as do the large cores derived for dwarf galaxies and by QSO flux anomalies. This exploration is timely because of the continued laboratory absence of WIMPs, and may establish light bosons as the most viable interpretation of dark matter.
Wednesday, 29 April 2015
Thursday, 30 April 2015
Friday, 1 May 2015
Saturday, 2 May 2015
Sunday, 3 May 2015
Monday, 4 May 2015
Tuesday, 5 May 2015
Wednesday, 6 May 2015
Thursday, 7 May 2015
16:00
High redshift cosmography in Dark Energy cosmological models
-
Ester Piedipalumbo
(
Universita di Napoli Federico II
)
High redshift cosmography in Dark Energy cosmological models
Ester Piedipalumbo
(
Universita di Napoli Federico II
)
16:00 - 17:00
Room: stanza 416, blocco C
Cosmography provides information about the evolution of the universe from measured distances, only assuming that the space time geometry is described by the Friedmann-Lemaitre-Robertson -Walker metric, and adopting a Taylor expansion of the scale factor. Our high-redshift analysis allows us to put constraints on the cosmographic expansion up to the fifth order. It is based on the Union2 Type Ia Supernovae data set, the Hubble diagram constructed from some Gamma Ray Bursts distance indicators, and gaussian priors on the distance from the Baryon Acoustic Oscillations, and the Hubble constant. The estimation of the higher order cosmographic parameters reflect the possibility of a deviation from the ΛCDM model. Moreover we investigate implications of our results for the parametrization of the dark energy equation of state. Finally we investigate the implications of the cosmographic analysis within the so called curvature quintessence scenarios. Our interest is actually focused on fourth order theories, based on replacing the scalar curvature R in the Hilbert-Einstein action with a generic f(R)
Friday, 8 May 2015
Saturday, 9 May 2015
Sunday, 10 May 2015
Monday, 11 May 2015
Tuesday, 12 May 2015
15:00
Geoneutrinos and heat production in the Earth
-
William F. McDonough
(
Maryland University
)
Geoneutrinos and heat production in the Earth
William F. McDonough
(
Maryland University
)
15:00 - 16:00
Room: stanza 300, blocco C
Geo-neutrinos, produced during beta decays of naturally occurring radioactive isotopes in the Earth, are a unique direct probe of our planets interior. The kTon-scale, underground, liquid scintillation detectors in Japan and Italy, which measure the flux of these electron anti-neutrinos, reveal that radiogenic heat from the decay of Th and U (only detectable signal) contributes between 20% and 50% of the Earth's present-day power (46+/-3 TW). These particle physics experiments are now establishing limits on acceptable compositional models for the Earth and are defining the amount of nuclear power inside the Earth available to drive plate tectonics, mantle convection, and the geodynamo.
Wednesday, 13 May 2015
Thursday, 14 May 2015
Friday, 15 May 2015
Saturday, 16 May 2015
Sunday, 17 May 2015
Monday, 18 May 2015
Tuesday, 19 May 2015
11:30
Reconciliation of hemispherical asymmetry and power suppression in the CMB
-
Suvodip Mukherjee
(
IUCAA, India
)
Reconciliation of hemispherical asymmetry and power suppression in the CMB
Suvodip Mukherjee
(
IUCAA, India
)
11:30 - 12:30
Room: stanza 412, blocco C
The recent measurements of temperature and polarization of Cosmic Microwave Background (CMB) have improved our understanding of the Universe and have showed a remarkable agreement with the ΛCDM cosmological model. However, scale dependent features like power suppression in the angular power spectrum, hemispherical asymmetry in the temperature field of CMB and direction dependent spectral index, indicate possible departure from the ΛCDM model persist in the CMB data. Speaker will discuss a mechanism linked to possible initial inhomogeneities in the inflationary scalar field that could explain all these observed phenomena. Initial inhomogeneities lead to non-zero values of anisotropic inflationary parameters, which at leading order cause different amounts of hemispherical asymmetry in the scalar and tensor perturbations. The second order effect of anisotropic inflationary parameters naturally lead to a suppression (enhancement) of power at low multipole l for scalar (tensor) perturbations. As a result this model unifies both the large angular scale features like suppression of power and hemispherical asymmetry by a single phenomenon. Along with this, the model also predicts a direction dependent spectral index, consistent with the direction of hemispherical asymmetry. The salient feature of this model is that it produces all the effects in tensor and scalar perturbations by just two independent parameters and future missions can measure these parameters uniquely and hence the validity of the model can be investigated.
Wednesday, 20 May 2015
Thursday, 21 May 2015
Friday, 22 May 2015
Saturday, 23 May 2015
Sunday, 24 May 2015
Monday, 25 May 2015
Tuesday, 26 May 2015
Wednesday, 27 May 2015
15:00
Glueballs and other exotic states in QCD
-
Francesco Giacosa
(
Jan Kochanowski University, Kielce, Poland.
)
Glueballs and other exotic states in QCD
Francesco Giacosa
(
Jan Kochanowski University, Kielce, Poland.
)
15:00 - 16:00
Room: stanza 300, blocco C
Non-conventional mesons, such as glueballs, tetraquarks as well as dynamically generated states, are in the center of theoretical and experimental studies of low-energy QCD. In this talk we review some basic properties of QCD in connection to the emergence of unconventional states. Then, we focus on the search of the expected not-yet discovered glueballs and the use of the extended Linear Sigma Model for this purpose, and on already discovered but not-yet understood states: the light scalar mesons below 1 GeV as well as the newly found heavy X,Y,Z states.
Thursday, 28 May 2015
Friday, 29 May 2015
Saturday, 30 May 2015
Sunday, 31 May 2015
Monday, 1 June 2015
Tuesday, 2 June 2015
Wednesday, 3 June 2015
Thursday, 4 June 2015
15:00
Development of Electron Tracking Compton Camera (ETCC) for a Survey of the Deep Universe by MeV gamma-rays
-
Toru Tanimori
(
Department of Physics, Kyoto University, Kyoto, Japan
)
Development of Electron Tracking Compton Camera (ETCC) for a Survey of the Deep Universe by MeV gamma-rays
Toru Tanimori
(
Department of Physics, Kyoto University, Kyoto, Japan
)
15:00 - 16:00
Room: stanza 412, blocco C
ETCC with a gas Time Projection Chamber (TPC) and pixel GSO scintillators, by measuring electron tracks, provides both a strong background rejection by dE/dx of the track and clear imaging by adding the arc direction of incident gammas (SPD: Scatter Plane Deviation) with the ARM (angular Resolution Measure) direction measured in standard Compton Camera (CC). In 2006 its background rejection was revealed by SMILE-I balloon experiment with 10cm-cubic ETCC using the dE/dx of tracks. In 2013, 30cm-cube-ETCC has been developed to catch gammas from Crab in next SMILE-II balloon with >5sigma detection for 4 hrs. Now its sensitivity has been improved to 10sigma by attaining the angular resolution of the track (SPD angle) to that determined by multiple scattering of the gas. Thus, we show the ability of ETCC to give a better significance by a factor of 10 than taht of standard CCs having same detection area by electron tracking. Based on this technology, SMILE-II with 3atm CF4 gas is expected to provide a 5times better sensitivity than COMPTEL in one month balloon, and 4modules of 50cm-cube ETCCs would exceed over 10^-12 erg/cm^2s^1 (1mCrab) in satellite. To verify its perfomance in space, SMILE-II was irradiated by intense gammas and neutron using 140MeV proton, and successfully measured both clear image of a weak RI without the efficiency deterioration under 10times stronger radiation than the space. Here we summarize the performance of the ETCC and new astrophysics opend in near future by high sensitive observation of MeV gamma-rays.
Friday, 5 June 2015
Saturday, 6 June 2015
Sunday, 7 June 2015
Monday, 8 June 2015
Tuesday, 9 June 2015
Wednesday, 10 June 2015
Thursday, 11 June 2015
Friday, 12 June 2015
Saturday, 13 June 2015
Sunday, 14 June 2015
Monday, 15 June 2015
Tuesday, 16 June 2015
Wednesday, 17 June 2015
Thursday, 18 June 2015
Friday, 19 June 2015
Saturday, 20 June 2015
Sunday, 21 June 2015
Monday, 22 June 2015
Tuesday, 23 June 2015
Wednesday, 24 June 2015
Thursday, 25 June 2015
Friday, 26 June 2015
Saturday, 27 June 2015
Sunday, 28 June 2015
Monday, 29 June 2015
15:00
The world turned upside-down: a story from the oceans’ underworld where life, matter and energy come from the earth’s interior
-
Ivano Walter Aiello
The world turned upside-down: a story from the oceans’ underworld where life, matter and energy come from the earth’s interior
Ivano Walter Aiello
15:00 - 16:00
Room: stanza 412, blocco C
It has been only a few decades since scientists have discovered that life at the surface of our planet and in oceans is just a fraction of the global biomass. Indeed, a large portion of life on Earth could occur beneath the oceans’ abyss, within marine sediments. In these ‘extreme’ environments, there is no sunlight, nor oxygen, and pressures are extremely high. Yet, it is the habitat of unicellular organisms, the simplest of all life forms, which can survive by ‘breathing’ chemicals carried by the interstitial fluids, fossil organic matter, hydrogen and methane. Our present understanding of deep microbial life, its extent and relationships/interactions with the subsea floor largely derive by deep-sea drilling science programs (e.g. IODP) that allow directly sampling and studying these buried environments. Deep subsea floor life has been also documented at the ocean bottom in deep hypersaline anoxic basins and mud volcanoes, which, unlike traditional volcanoes, are driven by chemistry and not heath.
Tuesday, 30 June 2015
Wednesday, 1 July 2015
Thursday, 2 July 2015
Friday, 3 July 2015
Saturday, 4 July 2015
Sunday, 5 July 2015
Monday, 6 July 2015
Tuesday, 7 July 2015
Wednesday, 8 July 2015
15:00
Light (anti)(hyper)nuclei production in Pb-Pb collisions
-
Ramona Lea
(
TS
)
Light (anti)(hyper)nuclei production in Pb-Pb collisions
Ramona Lea
(
TS
)
15:00 - 16:00
Room: 300 blocco C
The high collision energies reached at the LHC lead to significant production yields of light anti- and hyper-nuclei in proton-proton and, in particular, Pb-Pb collisions. Thanks to its excellent particle identification capability, the ALICE detector allows for the identification of deuterons, $\rm ^{3}{He}$ and $\rm ^{4}{He}$ and their corresponding antinuclei. This is achieved via the measurement of their specific energy loss in the Time Projection Chamber and of their velocity by the Time-Of-Flight detector. Moreover, thanks to the Inner Tracking System ability to separate primary from secondary vertices, it is possible to identify (anti)hypertritons ($\rm ^{3}_{\Lambda}{H}$) exploiting their mesonic weak decay ($\rm ^{3}_{\Lambda}{H}$ $\rightarrow$ $^{3}\rm{He}$ + $\pi^-$) and to search for a hypothetical bound state of a $\Lambda$ with a neutron decaying into a deuteron and a pion. Results on the production of light nuclei and anti-nuclei in Pb--Pb and lighter collision systems (pp and p--Pb) will be presented. Hypernuclei production rates in Pb--Pb will also be shown, together with a measurement of the hypertriton lifetime and upper limits estimated on the production of lighter exotica candidates. The experimental results will be compared with the predictions of both thermal (statistical) and baryon coalescence models.
Thursday, 9 July 2015
Friday, 10 July 2015
Saturday, 11 July 2015
Sunday, 12 July 2015
Monday, 13 July 2015
Tuesday, 14 July 2015
11:00
A brief summary of a few astro-statistical projects
-
Chris Koen
(
University of Cape Town
)
A brief summary of a few astro-statistical projects
Chris Koen
(
University of Cape Town
)
11:00 - 12:00
Room: stanza 412, blocco C
Five non-standard statistical problems, posed by astronomical observations, are described. These include: the upper limit on stellar masses; testing whether Cepheid pulsating stars in different galaxies are similar; and dis-entangling very weak periodic pulses from different sources, when the sources cannot be resolved. No expertise in either astronomy or statistics will be assumed.
Wednesday, 15 July 2015
Thursday, 16 July 2015
Friday, 17 July 2015
Saturday, 18 July 2015
Sunday, 19 July 2015
Monday, 20 July 2015
Tuesday, 21 July 2015
Wednesday, 22 July 2015
Thursday, 23 July 2015
Friday, 24 July 2015
Saturday, 25 July 2015
Sunday, 26 July 2015
Monday, 27 July 2015
Tuesday, 28 July 2015
Wednesday, 29 July 2015
Thursday, 30 July 2015
Friday, 31 July 2015
Saturday, 1 August 2015
Sunday, 2 August 2015
Monday, 3 August 2015
Tuesday, 4 August 2015
Wednesday, 5 August 2015
Thursday, 6 August 2015
Friday, 7 August 2015
Saturday, 8 August 2015
Sunday, 9 August 2015
Monday, 10 August 2015
Tuesday, 11 August 2015
Wednesday, 12 August 2015
Thursday, 13 August 2015
Friday, 14 August 2015
Saturday, 15 August 2015
Sunday, 16 August 2015
Monday, 17 August 2015
Tuesday, 18 August 2015
Wednesday, 19 August 2015
Thursday, 20 August 2015
Friday, 21 August 2015
Saturday, 22 August 2015
Sunday, 23 August 2015
Monday, 24 August 2015
Tuesday, 25 August 2015
Wednesday, 26 August 2015
Thursday, 27 August 2015
Friday, 28 August 2015
Saturday, 29 August 2015
Sunday, 30 August 2015
Monday, 31 August 2015
Tuesday, 1 September 2015
Wednesday, 2 September 2015
Thursday, 3 September 2015
Friday, 4 September 2015
Saturday, 5 September 2015
Sunday, 6 September 2015
Monday, 7 September 2015
Tuesday, 8 September 2015
Wednesday, 9 September 2015
Thursday, 10 September 2015
Friday, 11 September 2015
Saturday, 12 September 2015
Sunday, 13 September 2015
Monday, 14 September 2015
Tuesday, 15 September 2015
Wednesday, 16 September 2015
Thursday, 17 September 2015
Friday, 18 September 2015
Saturday, 19 September 2015
Sunday, 20 September 2015
Monday, 21 September 2015
Tuesday, 22 September 2015
Wednesday, 23 September 2015
Thursday, 24 September 2015
Friday, 25 September 2015
Saturday, 26 September 2015
Sunday, 27 September 2015
Monday, 28 September 2015
Tuesday, 29 September 2015
10:30
ULA‐OP: caratteristiche ed applicazioni non convenzionali di una piattaforma di ricerca ad ultrasuoni
-
Piero Tortoli
(
Laboratorio Progettazione sistemi microelettronici (MSDLab) Dipartimento di Ingegneria dell’Informazione Università degli Studi di Firenze
)
ULA‐OP: caratteristiche ed applicazioni non convenzionali di una piattaforma di ricerca ad ultrasuoni
Piero Tortoli
(
Laboratorio Progettazione sistemi microelettronici (MSDLab) Dipartimento di Ingegneria dell’Informazione Università degli Studi di Firenze
)
10:30 - 11:30
Room: stanza 412, blocco C
Negli ultimi anni, la ricerca sperimentale con ultrasuoni ha avuto grande impulso grazie allo sviluppo dei cosiddetti sistemi aperti (open scanners), vere e proprie piattaforme di ricerca che permettono il test di modalità di Imaging e Doppler non convenzionali. In questo seminario sarà presentata l’esperienza maturata nel nostro Laboratorio con il progetto e la realizzazione del sistema ULA‐OP (ULtrasound Advanced Open Platform). Tale sistema si caratterizza, oltre che per le piccole dimensioni ed il costo contenuto, per l’estrema flessibilità che ne permette l’uso in numerose applicazioni non compatibili con gli scanner commerciali. Dopo aver illustrato brevemente le caratteristiche generali del sistema e le possibili modalità di programmazione, saranno presentati alcune modalità avanzate di formazione di immagini (ad esempio, attraverso l’uso di onde piane) e di indagine flussimetrica Doppler (ad esempio, Doppler vettoriale in tempo reale).
Wednesday, 30 September 2015
Thursday, 1 October 2015
Friday, 2 October 2015
Saturday, 3 October 2015
Sunday, 4 October 2015
Monday, 5 October 2015
Tuesday, 6 October 2015
Wednesday, 7 October 2015
Thursday, 8 October 2015
Friday, 9 October 2015
Saturday, 10 October 2015
Sunday, 11 October 2015
Monday, 12 October 2015
Tuesday, 13 October 2015
Wednesday, 14 October 2015
Thursday, 15 October 2015
Friday, 16 October 2015
Saturday, 17 October 2015
Sunday, 18 October 2015
Monday, 19 October 2015
Tuesday, 20 October 2015
Wednesday, 21 October 2015
15:00
Gravitational waves and heavy elements from neutron-star mergers
-
Andreas Bauswein
(
Heidelberger Institut fuer Theoretische Studien, Heidelberg, Germany
)
Gravitational waves and heavy elements from neutron-star mergers
Andreas Bauswein
(
Heidelberger Institut fuer Theoretische Studien, Heidelberg, Germany
)
15:00 - 16:00
Room: stanza 412, blocco C
Collisions of neutron stars are connected with a rich phenomenology. For instance, matter which becomes gravitationally unbound from the merger site, is very neutron-rich and expands with very high velocities. This provides favorable conditions for the formation of heavy elements by the rapid neutron-capture process. These nucleosynthetic processes heat the ejecta and lead to a possibly observable electromagnetic counterpart. In addition, neutron-star mergers are strong emitters of gravitational radiation, and thus one of the prime targets of the existing and upcoming gravitational-wave detectors. Since the dynamics of the merger are affected by the unknown high-density matter equation of state, also the gravitational-wave signal is equation of state dependent. This, in turn, offers the possibility to derive properties of the equation of state from gravitational-wave detections.
Thursday, 22 October 2015
Friday, 23 October 2015
Saturday, 24 October 2015
Sunday, 25 October 2015
Monday, 26 October 2015
Tuesday, 27 October 2015
Wednesday, 28 October 2015
Thursday, 29 October 2015
Friday, 30 October 2015
Saturday, 31 October 2015
Sunday, 1 November 2015
Monday, 2 November 2015
Tuesday, 3 November 2015
Wednesday, 4 November 2015
Thursday, 5 November 2015
15:00
Magnetars and binary systems
-
Serguei Popov
(
Sternberg Astronomical Institute, Lomonosov Moscow State University
)
Magnetars and binary systems
Serguei Popov
(
Sternberg Astronomical Institute, Lomonosov Moscow State University
)
15:00 - 16:00
Room: stanza 412, blocco C
I review several scenarios of magnetar formation in binary systems via spinup of a progenitor due to interaction with its companion. Mostly, these evolutionary channels lead to formation of isolated magnetars, and indeed, all well-established sources of this class are single objects. However, some binaries can survive, and several candidates to accreting magnetars have been proposed. I discuss this issue, and conclude that new accretion models can explain properties of the proposed candidates without large magnetic field in correspondence with models of magnetic field evolution.
Friday, 6 November 2015
Saturday, 7 November 2015
Sunday, 8 November 2015
Monday, 9 November 2015
Tuesday, 10 November 2015
Wednesday, 11 November 2015
Thursday, 12 November 2015
Friday, 13 November 2015
Saturday, 14 November 2015
Sunday, 15 November 2015
Monday, 16 November 2015
Tuesday, 17 November 2015
Wednesday, 18 November 2015
Thursday, 19 November 2015
Friday, 20 November 2015
Saturday, 21 November 2015
Sunday, 22 November 2015
Monday, 23 November 2015
Tuesday, 24 November 2015
Wednesday, 25 November 2015
Thursday, 26 November 2015
Friday, 27 November 2015
Saturday, 28 November 2015
Sunday, 29 November 2015
Monday, 30 November 2015
16:15
Unsolved puzzles of Gamma Ray Bursts
-
Alexei Pozanenko
(
Space Research Insitute (IKI, Moscow)
)
Unsolved puzzles of Gamma Ray Bursts
Alexei Pozanenko
(
Space Research Insitute (IKI, Moscow)
)
16:15 - 17:15
Room: stanza 412, blocco C
Tuesday, 1 December 2015
Wednesday, 2 December 2015
Thursday, 3 December 2015
15:00
The magnetar model for GRBs.
-
Niccolò Bucciantini
(
Osservatorio di Arcetri
)
The magnetar model for GRBs.
Niccolò Bucciantini
(
Osservatorio di Arcetri
)
15:00 - 16:00
Room: stanza 412, blocco C
Recent observations of late time activity both in Short and long GRBs, have strengthen the idea that a long lived engine is at work. A possible rapidly rotating strongly magnetized proto-neutron star looks at the moment the best candidate to explain this class of highly energetic explosions. I will briefly review the main properties of GRB, and the strength of the magnetar model, and numerical results relating the birth of magnetized NS and their impact of the SN explosion, and the competition between EM and GW losses. I will also discuss possible limitations and recent attempts to extend the magnetar idea to connect GRBs with the standard population of SNe.
Friday, 4 December 2015
Saturday, 5 December 2015
Sunday, 6 December 2015
Monday, 7 December 2015
Tuesday, 8 December 2015
Wednesday, 9 December 2015
Thursday, 10 December 2015
15:00
X-ray binaries and Ultra-luminous X-ray sources
-
Grzegorz Wiktorowicz
(
Universita di Varsavia
)
X-ray binaries and Ultra-luminous X-ray sources
Grzegorz Wiktorowicz
(
Universita di Varsavia
)
15:00 - 16:00
Room: stanza 412, blocco C
All known to date stellar mass black holes reside in X-ray binaries (XRB). They are connected with a number of uncommon phenomena like mass transfer, state transitions, and relativistic jets. Analysis of XRB gives us insights in their formation mechanism and particularly the origin of compact objects. Probably, their most interesting feature is the "the mass gap" (i.e., the lack of compact objects with masses ~2-5 MSun). This observation is a stringent test for compact object formation mechanism. Ultraluminous X-ray sources (ULX) are the strongest point-like X-ray sources known to date. The high energetic emission seems to be a hallmark of violent interactions between a strong gravitational field and matter. Recent works showed a strong resemblance between ULXs and XRBs suggesting that they may constitute the extreme part of their population. We know several hundred ULXs which could prove to be the marvelous laboratories of extreme processes.
Friday, 11 December 2015
09:30
Deflection of high-energy charged particle by a bent crystal
-
Igor Kirillin
(
Akhiezer Institute for Theoretical Physics, Kharkov, Ucraina
)
Deflection of high-energy charged particle by a bent crystal
Igor Kirillin
(
Akhiezer Institute for Theoretical Physics, Kharkov, Ucraina
)
09:30 - 10:30
Room: stanza 300
When a high-energy charged particle impinges on a crystal with a small angle with respect to one of the main crystallographic axes, correlations between consecutive collisions of the particle with lattice atoms appear. Due to these correlations and strong intra-crystalline fields, the direction of the particle motion can be changed within quite small distances. The passage of high-energy charged particles through a bent crystal is of particular interest because, in this case, it is possible to deflect the direction of motion of charged particle beam with a small-sized crystal. There are several mechanisms of deflection of high-energy charged particles by a bent crystal connected with finite (channeling) and infinite (above barrier) motion in relation to bent atomic strings or bent crystal atomic planes. These mechanisms are realized in the planar and axial channeling in a bent crystal, in the stochastic mechanism of beam deflection (connected with multiple scattering by bent crystal atomic strings) and volume reflection from bent crystal atomic planes. The main point of this seminar is comparison of these mechanisms.
Saturday, 12 December 2015
Sunday, 13 December 2015
Monday, 14 December 2015
Tuesday, 15 December 2015
Wednesday, 16 December 2015
Thursday, 17 December 2015
15:00
An experience of using OpenCL for simulation of high-energy charged particle motion in a crystal
-
Igor Kirillin
(
Akhiezer Institute for Theoretical Physics, Kharkov, Ucraina
)
An experience of using OpenCL for simulation of high-energy charged particle motion in a crystal
Igor Kirillin
(
Akhiezer Institute for Theoretical Physics, Kharkov, Ucraina
)
15:00 - 16:00
Room: stanza 300
The Open Computing Language (OpenCL) is an open parallel computing API designed to enable GPUs and other coprocessors to work in tandem with the CPU. It is cross-platform and royalty-free standard. The main point of this seminar is to tell about the experience of using OpenCL for parallelization of computing the trajectories of high-energy charged particles in a crystal. If the crystal is rather small interaction of the particles with each other can be ignored and so the trajectories of particles can be calculated in parallel. This gives acceleration of computations proportional to the number of computing units of CPU and GPU.
Friday, 18 December 2015
15:00
Neutrino Oscillation Tomography
-
Carsten Rott
(
Sungkyunkwan University, Korea
)
Neutrino Oscillation Tomography
Carsten Rott
(
Sungkyunkwan University, Korea
)
15:00 - 16:00
Room: stanza 412, blocco C
The unknown constituents of the interior of our home planet have provoked the human imagination and driven scientific exploration. In the near future it might be possible to determine the Earth’s chemical composition by combining observations from large neutrino detectors with seismic measurements of the Earth’s matter density and data from high pressure experiments. The talk will introduce this novel method and discuss its potential. Neutrino detectors including the IceCube Neutrino Telescope, which recently discovered high-energy astrophysical neutrinos, will be introduced and future detector upgrades which could perform a first neutrino oscillation tomography measurement discussed.
Saturday, 19 December 2015
Sunday, 20 December 2015
Monday, 21 December 2015
Tuesday, 22 December 2015
Wednesday, 23 December 2015
Thursday, 24 December 2015
Friday, 25 December 2015
Saturday, 26 December 2015
Sunday, 27 December 2015
Monday, 28 December 2015
Tuesday, 29 December 2015
Wednesday, 30 December 2015
Thursday, 31 December 2015