22-24 May 2013
Physics Department, University "La Sapienza", Roma, Italy
Europe/Rome timezone
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Displaying 95 contributions out of 95
A wide range of astrophysical measuments evidence that the stars and gas in all galaxies are immersed in a much larger cloud of non-luminous and non-baryonic "dark matter". The nature of the dark matter is still totally unknown, and the resolution of the “dark matter puzzle” is of fundamental importance to cosmology, astrophysics, and elementary particle physics. One of the major lines of res ... More
Presented by Stefano DAVINI on 22 May 2013 at 17:30
The JEM-EUSO experiment, Extreme Universe Space Observatory at the Japanese Module of the International Space Station, is the first space mission devoted to the scientific research of cosmic rays of highest energies. JEM-EUSO will address basic problems of fundamental physics and high-energy astrophysics studying the nature and origin of the Ultra High Energy Cosmic Rays (E > 3×10^19 eV). The JEM ... More
Presented by Prof. Piergiorgio PICOZZA on 23 May 2013 at 10:00
The KM3NeT Collaboration aims to build, deploy and operate in the Mediterranean Sea a neutrino telescope with a volume of several cube kilometres. Using the experienced gained by the precursor projects, this telescope will complement IceCube, ensuring full coverage of the sky. Due to its location, it will have a privileged access to the Galactic centre and to a large fraction of the Galactic plan ... More
Presented by Dr. Juan-Jose HERNANDEZ-REY on 23 May 2013 at 12:40
During the last years our knowledge of Active Galactic Nuclei (AGNs) in the gamma-ray band has received a huge boost mainly due to the advent of a new generation of satellite instruments, such as the Fermi Large Area Telescope (LAT) and AGILE. Besides incrementing tremendously the number of gamma-ray detected objects and opening the window to the discovery of unexpected source classes, the new fac ... More
Presented by Dr. Sara BUSON on 22 May 2013 at 15:45
In recent years the astro-particle community is involved in the realization of experimental apparatuses for the detection of high energy neutrinos originated in cosmic sources or produced in the interaction of Cosmic Rays with the Cosmic Microwave Background. For neutrino energies in the TeV-PeV range, the underwater optical Cherenkov technique is considered optimal. For higher energies, three exp ... More
Presented by Francesco SIMEONE on 24 May 2013 at 12:50
The MAGIC telescopes for gamma-ray astronomy in the very-high energy range are located on the Canary island of La Palma. They are two imaging atmospheric Cherenkov telescopes with 17m diameter composite mirror dishes and ultra-fast electronics. Reaching an energy threshold as low as 50 GeV for observations at low zenith angles, they can close the energy gap between satellite-bourne and ground-base ... More
Presented by Oscar BLANCH BIGAS on 22 May 2013 at 12:35
The KM3NeT-Italy Collaboration has entered the production stage of an 8 tower apparatus that will be deployed at about 100 km away from the Sicily coast. The architecture of the system is based on the NEMO Phase-2 prototype tower that is taking data since the deployment in March 2013. In order to optimize production costs, power consumpion, and usability some components have been re-engineered by ... More
Presented by Carlo Alessandro NICOLAU on 22 May 2013 at 18:00
LOFAR (the LOw Frequency ARray) is a new kind of radio telescope built in the Netherlands and its neighboring countries for astronomical observations in the low frequency range of ~ 10-240 MHz. Unlike traditional radio telescopes which consist of steerable big parabolic dishes, LOFAR uses simple dipole antennas which remain static on the ground. Using digital signal processing, LOFAR can point tow ... More
Presented by Dr. Satyendra THOUDAM on 24 May 2013 at 11:50
In its almost 5 years mission, the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope has detected around 40 Gamma-Ray Bursts above 100 MeV. The high energy observations of Gamma-ray Bursts by Fermi-LAT gave rise to many recent theoretical challenges. The talk will present an overview of the general properties of GRBs in the high energy band and their theoretical implicat ... More
Presented by Francesco LONGO on 22 May 2013 at 14:45
The Borexino experiment has recently completed the Phase I and has already started the Phase II, with even lower radioactive background. The talk will summarize the result of the Phase I on solar and geophysical neutrinos. Besides, it will cover the contents of the letter of intent of Phase II, recently published on ArXiV. The Phase II aims at the completion of the study of the low energy solar n ... More
Presented by Marco Giulio GIAMMARCHI on 23 May 2013 at 17:15
Session: Poster Session
GRBs have been found within a wide range of power and photon energy spectra. Their understanding was usually seen as the largest explosion, fireball, billion times a SN one. Fireball, by definition were isotropic. Last decades have been an evolution of fire-ball hitting shells in some fountain of tens degree size. I advocated since 1998 a much thinner jet whose solid angle is a part of a billion ... More
Presented by Prof. Daniele FARGION on 22 May 2013 at 18:42
This talk will discuss two questions about the propagation of cosmic rays: the charge dependent modulation in the heliosphere and the confinement of particles in the Milky Way. In both cases the global structure of the magnetic field plays a crucial role.
Presented by Paolo LIPARI on 23 May 2013 at 10:40
Presented by Aldo MORSELLI on 24 May 2013 at 16:00
Presented by Prof. Petr TINYAKOV on 24 May 2013 at 15:15
Presented by Antonio CAPONE on 24 May 2013 at 16:45
Cosmic ray physics in the 10^12-10^15eV primary energy range is among the main scientific goals of the ARGO-YBJ experiment. The detector, located in the Cosmic Ray Observatory of Yangbajing (Tibet, China) at 4300m a.s.l., is a full coverage Extensive Air Shower array consisting of a carpet of Resistive Plate Chambers (RPC) of about 7000m2. The apparatus layout, performance and location offer a uni ... More
Presented by Ivan DE MITRI on 22 May 2013 at 09:20
In the last decade important results were obtained about CR anisotropy at energy below the knee, i.e. for galactic CRs. Experiments like Tibet ASg, Milagro, ARGO-YBJ and Icecube reached unprecedented accuracy in measuring the arrival direction distribution of CRs and collected more than 10^12 showers both in the northern and the southern hemisphere. There have been important findings, like the dis ... More
Presented by Dr. Roberto IUPPA on 23 May 2013 at 14:30
Session: Poster Session
In the last few years, very important data on high-energy cosmic-ray electrons and positrons from high-precision space-borne and ground-based experiments have attracted a great deal of interest.These particles represent a unique probe for studying local comic-ray accelerators because they lose energy very efficiently and rapidly by two dominant processes: inverse Compton scattering and synchrotron ... More
Presented by Mr. Rafik SEDRATI on 22 May 2013 at 18:40
Session: Poster Session
Recent progress in growth of single crystal Chemical Vapour Deposition (CVD) diamonds of very high purity and high homogeneity has opened new perspectives to UV photosensors dedicated to work optically coupled to next generation two-phase liquid-Ar (LAr) and/or liquid-Xe (LXe) detectors for future neutrino and dark matter experiments. These physical investigations require detectors that combine ... More
Presented by Prof. Andrea LAVAGNO on 22 May 2013 at 18:30
The term “muon puzzle” was finally formulated at International Symposium on Future Directions in UHECR Physics in CERN 13-16 February 2012. In this talk various aspects of muon puzzle and brief history of their appearance are considered. It is possible to separate two types of experimental results: an excess of muon bundles which is increasing with energy of primary particles, and excess of ve ... More
Presented by Prof. Anatoly PETRUKHIN on 23 May 2013 at 14:45
Session: Poster Session
Detailed simulations of EAS have been carried out with CORSIKA program in order to evaluate the energy brought by different shower components at ground level and transmitted underground. A special attention is given to the angular distributions and to the collimation of beams penetrating deep underground or underwater. The natural collimation of high energy particles in EAS cores results mainly fr ... More
Presented by Dr. Mohamed Chérif TALAI on 22 May 2013 at 18:38
The relativistic electrons responsible for the observed broad band synchrotron / inverse Compton emission from blazars can be either directly accelerated at the source (primary electrons) or produced in result of interactions of high energy protons with surrounding medium (secondary electrons). If the observed electromagnetic emission from blazars is produced by secondary electrons, neutrino emiss ... More
Presented by Ms. Celine TCHERNIN on 22 May 2013 at 16:30
In this presentation we will review and discuss the main scientific results of the PAMELA mission. Since 2006, the space spectrometer PAMELA has been providing high-precision data for cosmic rays of galactic, solar, trapped and terrestrial origin in the energy range 100MeV 1.2 TeV, often challenging the current understanding of production and propagation of particles in the galaxy and in the sola ... More
Presented by Marco CASOLINO on 23 May 2013 at 09:00
Because they are bright and distant, Gamma-ray Bursts (GRBs) have been used for more than a decade to test propagation of photons and to constrain relevant Quantum Gravity (QG) models in which the velocity of photons in vacuum can depend on their energy. With its unprecedented sensitivity and energy coverage, the Fermi satellite has provided the most constraining results on the QG energy scale so ... More
Presented by Dr. Julien BOLMONT on 22 May 2013 at 15:00
Direct and indirect dark matter searches will be reviewed. Several interesting theoretical models of annihilating and decaying dark matter will be discussed. For annihilating dark matter, the possibility of obtaining stringent model-independent constraints from Fermi-LAT inner Galaxy measurements, will also be analyzed.
Presented by Prof. Carlos MUNOZ on 22 May 2013 at 11:30
Exactly two years ago, the AMS-02 spectrometer was installed on the ISS to start its long mission to perform highly accurate measurements of Cosmic Rays up the TeV region. We discuss the status of the experiment after two years in space and the first results, in particular the measurement of positron/electron ratio up to 350 GeV.
Presented by Roberto BATTISTON on 23 May 2013 at 09:40
The KASCADE-Grande experiment operated in KIT from January 2004 to November 2012, measuring EAS generated by primary cosmic rays in the 10^16-10^18 eV energy range. The experiment detected, for each single event and with a high resolution, the total number of charged particles (Nch) and of muons (Nm). In this talk I will present the updated results about: - the measurement of the all particle en ... More
Presented by Andrea CHIAVASSA on 22 May 2013 at 09:40
Deployed at the end of 2010 at the Pierre Auger observatory, the first stage of the Auger Engineering Radio Array, AERA24, consists of 24 radio stations covering an area of 0.5 km². AERA measures the radio emission from cosmic-ray induced air showers. This electric field is used to constrain the characteristics of the primary particle: arrival direction, energy and nature.These studies are possib ... More
Presented by Mrs. Jennifer MALLER on 23 May 2013 at 15:15
Analysis of cosmic-ray surface data collected with the IceTop array of Cherenkov detectors at the South Pole gives an accurate measurement of the cosmic-ray spectrum and its features in the "knee" region and at higher energies up to about 1 EeV. IceTop is part of the IceCube Observatory, a cubic kilometer Cherenkov detector deployed under IceTop in the polar ice sheet, which reconstructs tracks o ... More
Presented by Dr. Alessio TAMBURRO on 22 May 2013 at 11:50
Session: Poster Session
We study the influence of the random part of the Galactic magnetic field on the propagation of ultra high-energy cosmic rays. We can derive an approximated but clear and direct relation to cosmic ray deflections, bypassing the detailed knowledge of the magnetic properties of the turbulent plasma. Thanks to the observational data on rotational measures, we then build a direction-dependent map of su ... More
Presented by Federico URBAN on 22 May 2013 at 18:33
We discuss the possibility that some recently measured anisotropic cosmic ray components in the TeV-PeV range may be an indication of the ejection of a peculiar type of matter formed in a neutron star internal transition caused by the critical accretion of dark matter from the galactic halo.Current parallel accelerator experiments on earth or on the ISS may shed light on this exotic form of matte ... More
Presented by Dr. M Angeles PEREZ GARCIA on 23 May 2013 at 15:30
Synchrotron emission from electron cosmic ray populations can be used to study both cosmic rays physics and WIMP dark matter imprints on radio skymaps. We used available radio data - from MHz to GHz - to analyze the contribution from galactic WIMP annihilations and impose constraints on WIMP observables: annihilation cross section, channel and mass. Depending on the annihilation channel we obtain ... More
Presented by Dr. Roberto A. LINEROS on 22 May 2013 at 17:10
The ANTARES telescope, with a duty cycle close to unity and a full hemisphere of the sky at all the times visible, is well suited to detect neutrinos produced in astrophysical transient sources. Assuming a known neutrino production period, the background and point-source sensitivity can be drastically improved by selecting a narrow time window around it. Blazars are radio-loud active galactic nucl ... More
Presented by Mr. Agustín SáNCHEZ LOSA on 22 May 2013 at 17:00
We present the preliminary test results of the prototype detector, working at Sphinx Observatory Center, Jungfraujoch ($\sim$3800 m a.s.l.) HFSJG - Switzerland. This prototype detector is designed to measure a large angle cosmic rays flux emerging from the Earth crust. This station provides us an opportunity to understand if the prototype detector works safely under harsh environmental conditions ... More
Presented by Mr. Ali YILMAZ on 23 May 2013 at 17:25
The Pierre Auger Observatory in Argentina is the largest cosmic ray detector array ever built. Although the construction was completed in 2008, the Observatory has been taking data continuously since January 2004. Its main goal is to measure ultra high energy cosmic rays (UHECRs, energy above $10^{18}$ eV) with unprecedented statistics and precision. Measurements of the energy spectrum, chemi ... More
Presented by Denise BONCIOLI on 22 May 2013 at 10:20
We propose a new method to identify flavors of ultra high energy cosmic neutrinos. Energy loss of leptons in matter provides important informations for the detection of neutrinos originated from high energy astrophysical sources. 50 years ago, Askaryan proposed to detect Cherenkov signals by radio wave from the negative charge excess of particle showers. The theory of Cherenkov pulses with Fraunho ... More
Presented by Dr. Kwang-Chang LAI on 24 May 2013 at 12:10
The search for an excess of antideuterons in the cosmic rays flux has been proposed as a very promising channel for dark matter indirect detection, especially for WIMPs with a low or intermediate mass. With the development of the AMS experiment and the proposal of a future dedicated experiment, i.e. the General Antiparticle Spectrometer (GAPS), there are exciting possibilities for a dark matter de ... More
Presented by Andrea VITTINO on 22 May 2013 at 15:00
Our knowledge on ultra-high energy cosmic rays and their underlying sources and acceleration mechanisms is steadily improving thanks to the large observatories nowadays in operation. However the need for a next generation instrument is emerging from their experimental limitations and the scientific questions currently out of reach within a reasonable time line. Within these scope, the main featur ... More
Presented by Dr. lilian MARTIN on 24 May 2013 at 11:30
AMS-02 recently measured the cosmic ray positron fraction (PF) with unprecedented accuracy in a wider energy range (0.5 - 350 GeV) than PAMELA and Fermi-LAT did. Above few hundred GeV the electron and positron spectra are expected to be significantly affected by the spatial distribution of sources. For this reason we model, for the first time, their propagation by means of a 3-dimensional numeric ... More
Presented by Dario GRASSO on 22 May 2013 at 14:40
The ARGO-YBJ experiment is a full-coverage air shower detector operating at the Yangbajing International Cosmic Ray Observatory (Tibet, P.R China, 4300 m a.s.l.). The detector was in stable data taking in its full configuration from Nov. 2007 to Dec 2012. More than 10^11 events have been collected and reconstructed. Due to its characteristics (full-coverage, high segmentation,high altitude operati ... More
Presented by Paolo MONTINI on 23 May 2013 at 15:45
Session: Poster Session
As a non-imaging wide-angle Cherenkov air shower detector array with an area of up to 100 km2, HiSCORE (Hundred Square km Cosmic ORigin Explorer) is built to measure gamma rays and cosmic rays in an energy range of 10 TeV up to 1EeV. Three stations consisting of light collector Winston cones equipped with photomultiplier tubes have already been deployed to Tunka Valley, Russia. The first resu ... More
Presented by Ms. Maike Helena KUNNAS on 22 May 2013 at 18:32
The Telescope Array ultra-high energy cosmic ray detector, situated in Utah, USA, is taking data since March 2008. We will present the latest results of the spectrum, composition and anisotropy studies based on the 4 years of the Telescope Array data.
Presented by Prof. Petr TINYAKOV on 22 May 2013 at 10:40
Tunka-Rex is the new radio extension to Tunka-133 located in Siberia close to lake Baikal. The latter is a photomultiplier array registering air-Cherenkov light from air showers induced by cosmic-ray particles with initial energies of $10^16$ – $10^18$ eV. Tunka-Rex extends this detector with 20 antennas spread over an area of 1 km2 . It is triggered externally by Tunka-133, and detects the rad ... More
Presented by Mr. Dmitriy KOSTUNIN on 24 May 2013 at 09:20
AGILE is a Scientific Mission of the Italian Space Agency (ASI) with INFN, INAF e CIFS participation devoted to gamma-ray astrophysics. The satellite is in orbit since April 23rd, 2007. Thanks to its sky monitoring capability and fast ground segment alert system, AGILE is producing several important scientific results, among which the unexpected discovery of strong and rapid gamma-ray flares fro ... More
Presented by Dr. Carlotta PITTORI on 22 May 2013 at 14:30
The GERmanium Detector Array (GERDA) is an experiment designed to investigate the neutrinoless double beta decay (0nubb) in 76Ge. An array of high purity germanium detectors enriched to 86% of 76Ge is operated inside 65m^3 of liquid argon (LAr) inside the Laboratori Nazionali del Gran Sasso. The experiment aims to explore the 0nubb half-life up to 1.4e26 yr with a collected exposure of 100 kg yr ... More
Presented by Bjoern LEHNERT on 23 May 2013 at 17:45
The satellite-borne PAMELA experiment has been continuously collecting data since 2006. This apparatus is designed to study charged particles in the cosmic radiation. The combination of permanent magnet, silicon strip spectrometer and silicon-tungsten imaging calorimeter, with the redundancy of instrumentation allows very precise studies on the physics of cosmic rays in a wide energy range and ... More
Presented by Matteo MARTUCCI on 22 May 2013 at 14:15
for the PAMELA Collaboration. PAMELA (Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics) is a space-borne experiment launched on 15 June 2006 and continuously collecting data since then. The apparatus measures electrons, positrons, protons, anti-protons and heavier nuclei from about 100 MeV to several hundreds of GeV. On-board instrumentation is built around a permanent ... More
Presented by Mr. Matteo MERGè on 22 May 2013 at 14:00
We will present the status and the main results of the Pierre Auger Observatory. These include the measurement of the energy spectrum above 10^18 eV, where we observe a suppression for energies larger than 5.5X10^19eV, the analyses of the arrival directions and the chemical composition. The implications on the origin and on the acceleration mechanisms of the most energetic Cosmic Rays will be di ... More
Presented by Daniele MARTELLO on 22 May 2013 at 10:00
During the last decade, balloon-borne experiments dedicated to more and more detailed measurements of low energy cosmic rays have achieved important progress : new challenge in solar physics and dosimetry, search for signals of dark matter in cosmic rays and diffuse γ-rays at higher energy, search for antimatter or consistency of the “leaky box” model, etc. New candidates enlarging the multip ... More
Presented by Dr. Taoufik DJEMIL
The ANTARES neutrino telescope is currently the largest operating water Cherenkov detector and the largest neutrino detector in the Northern Hemisphere. It comprises 885 optical modules distributed on 12 detection lines anchored at a depth of about 2,5 km in the Mediterranean Sea near Toulon (France). Its main scientific target is the detection of high-energy (TeV and beyond) neutrinos from cosmi ... More
Presented by Dr. Veronique VAN ELEWYCK on 23 May 2013 at 12:00
VSiPMT (Vacuum Silicon PhotoMultiplier Tube) is an innovative hybrid photon detector combining the performances and the potential of SiPM technology with a hemispherical glass PMT standard envelope. Our purpose is to combine the key features of a SiPM (high quantum efficiency, low operation voltages, insensitivity to magnetic fields and robustness) with the large sensitive area of a photocathode. ... More
Presented by Daniele VIVOLO on 23 May 2013 at 17:05
The blazar Mrk 421 is one of the brightest extragalactic TeV gamma-ray sources. Like the other TeV blazars, it presents flaring episodes in both X-rays and TeV gamma-rays. A correlation has been observed between the emissions in these two energy bands, although not all X-ray flares have been associated with a simultaneous increase in the TeV flux. Milagro was a TeV gamma-ray detector located nea ... More
Presented by Dr. Barbara PATRICELLI on 23 May 2013 at 14:30
VERITAS is an array of four imaging atmospheric Cherenkov telescopes near Tucson, Arizona and is one of the world's most sensitive detectors of very high energy (VHE: >100 GeV) gamma rays and cosmic rays. The scientific reach of VERITAS covers the study of both Extragalactic and Galactic objects and the search for astrophysical Dark Matter. In this talk I will discuss the status of VERITAS opera ... More
Presented by Dr. David STASZAK on 23 May 2013 at 14:45
The High Altitude Water Cherenkov (HAWC) observatory is a TeV gamma-ray and cosmic-ray detector currently under construction at an altitude of 4100 m close to volcano Sierra Negra in the state of Puebla, Mexico. The HAWC observatory is an extensive air-shower array comprised of 300 optically-isolated water Cherenkov detectors (WCDs). Each WCD contains ~200,000 liters of filtered water and four upw ... More
Presented by Dr. Antonio MARINELLI on 23 May 2013 at 15:05
We calculate the diffuse gamma-ray emission due to the population of misaligned AGN (MAGN) unresolved by the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope. We demonstrate that the MAGN can contribute from 10% up to nearly the entire measured Isotropic Gamma-Ray Background (IGRB), with a theoretical uncertainty on the flux of almost an order of magnitude. We also evaluate the r ... More
Presented by Dr. Fiorenza DONATO on 22 May 2013 at 14:20
IceCube is a neutrino observatory in operation at the geographical South Pole. The main objective of IceCube is to conduct high-energy neutrino astronomy, including the search for the sources of cosmic rays. Neutrinos are detected by observing blue Cherenkov light from charged particles product of neutrino-matter interaction at or near the detector. An array of 86 strings, each consisting of 60 d ... More
Presented by Ignacio TABOADA on 23 May 2013 at 12:20
Session: Poster Session
Gamma Ray Bursts (GRBs) are among the most powerful events in the Universe. They have been observed from radio to GeV energies. In the past few years Fermi LAT has shown that GRBs are able to produce photons up to 30 GeV (approx. 90 GeV corrected for redshift for GRB 090902B). It is unknown up to what energy the spectrum extends. Studying the spectrum beyond 10 GeV, is of interest in understanding ... More
Presented by Ignacio TABOADA on 22 May 2013 at 18:36
I will discuss constraints on dark matter annihilating or decaying in the Milky Way Halo from observations of the diffuse gamma-ray emission with the Fermi Large Area Telescope. A novel approach is developed to take into account the astrophysical foregrounds, with the use of the GALPROP code to model the foreground astrophysical diffuse emission and a profile likelihood formalism to marginalize ... More
Presented by Dr. Alessandro CUOCO on 22 May 2013 at 14:00
Session: Poster Session
PAMELA is a satellite borne experiment designed to study with great accuracy cosmic rays of galactic, solar, and trapped nature, with particular focus on the antimatter component. The detector consists of a permanent magnet spectrometer core to provide rigidity and charge sign information, a Time-of-Flight system for velocity and charge information, a Silicon-Tungsten calorimeter and a Neutron ... More
Presented by Valerio FORMATO on 22 May 2013 at 18:34
ABSTRACT ESAs INTEGRAL Space Observatory has just spent his first decade in orbit, producing an unprecedented harvest of results in the soft gamma-ray range, ranging from the inventory of the high energy sources, to the discovery of hundreds of variable soft gamma-ray sources to the mapping of the Aluminum and 511 keV annihilation line in the Galaxy and the evidence of polarized gamma ray emiss ... More
Presented by Prof. Pietro UBERTINI on 23 May 2013 at 10:20
The ANAIS (Annual Modulation with NaI(Tl) Scintillators) experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory. 250 kg of ultrapure NaI(Tl) crystals will be used as a target, divided into 20 modules, each coupled to two photomultipliers. Two NaI(Tl) crystals of 12.5 kg each, grown by Alpha Spectra from a powder havin ... More
Presented by Mrs. Clara CUESTA on 22 May 2013 at 17:50
The origin, propagation, and mechanisms of acceleration of the ultra-high energy cosmic rays (UHECRs) are not yet well understood. Aiming for a better interpretation of the available experimental data, it is important to develop computational tools to propagate these cosmic rays from their source to Earth, and confront theoretical models with the current data. A realistic simulation of the propaga ... More
Presented by Rafael ALVES BATISTA on 23 May 2013 at 16:00
Supernova Remnant (SNR) shocks are considered the main source of galactic cosmic-rays at least up to the knee of the cosmic-ray spectrum, and possibly further. From recent high-energy observations of SNRs a magnetic field at the shock far exceeding the theoretically predicted shock-compressed field has been inferred. Theoretical work in the last decade has linked particles accelerated at the shock ... More
Presented by Dr. Federico FRASCHETTI on 22 May 2013 at 15:30
We present a concise overview of the status of particle physics after the important recent experimental developments.
Presented by Prof. Guido ALTARELLI on 23 May 2013 at 11:30
Session: Poster Session
Presented by Vladimir AYNUTDINOV on 22 May 2013 at 18:41
The High Altitude Water Cherenkov (HAWC) Observatory is a wide-field gamma-ray detector sensitive to gamma rays with energies between 100 GeV and 100 TeV.  Located on the volcán Sierra Negra in Puebla, Mexico at an elevation of 4100 meters above sea level, HAWC will observe ~6 sr of the sky each day.  The large field-of-view and continuous operation make HAWC an ideal instrument to search the ... More
Presented by Dr. Gus SINNIS on 24 May 2013 at 09:40
The detailed origin of the diffuse gamma-ray background is still unknown. However, the contribution of unresolved sources is expected to induce small-scale anisotropies in this emission, which may provide a way to identify and constrain the properties of its contributors. Recent studies have predicted the contributions to the angular power spectrum (APS) from extragalactic and galactic dark matter ... More
Presented by Mr. German Arturo GOMEZ VARGAS on 22 May 2013 at 15:20
UHECR may keep memory of their source because their rigidity do not suffer much of magnetic bending. Therefore we are waiting for the birth of an UHECR astronomy. We do observe by AUGER a little UHECR clustering. On the other side at TeVs-PeVs energy scale cosmic rays at medium scale show anisotropy in the sky, without any plausible source or reasonable explanation. We suggest that UHECR radio ... More
Presented by Prof. Daniele FARGION on 23 May 2013 at 15:00
Session: Poster Session
Total cross section measurements at cosmic ray energies can reveal information about the shape of hadronic matter. Recent measurements at cosmic ray energies and at TOTEM/LHC confirm the growth of the total cross section. Based on theoretical investigations it is found that Geometrical picture helps us in having a glimpse of hadronic radii indicating the growth of hadrons at ultrahigh energies.
Presented by Prof. Fazale ALEEM on 22 May 2013 at 18:37
Accurate knowledge of thermonuclear reaction rates is important in understanding the generation of energy, the luminosity of neutrinos, and the synthesis of elements in stars. The LUNA Collaboration has shown that, by going underground and by using the typical techniques of low background physics, it is possible to measure nuclear cross sections down to the energy of the nucleosynthesis inside s ... More
Presented by Dr. Alba FORMICOLA on 23 May 2013 at 18:05
In my talk I will explore the possibility that the dark matter is related to the origin of neutrino masses. In fact, neutrino masses could arise from spontaneous breaking of ungauged lepton number and the resulting Goldstone boson, the majoron, may pick up a mass due to gravity and play the role of dark matter. I will first examine the cosmological constraints on the majoron density and lifetime. ... More
Presented by Dr. Massimiliano LATTANZI on 22 May 2013 at 15:40
Nowadays the situation regarding the detection of Dark Matter (DM) is extremely exciting and promising. On the one hand, indirect detection experiments, such as Femi-LAT, are collecting data from the whole sky and beginning to constrain vanilla DM models, specially for light DM masses. On the other hand, direct detection experiments have reached an unprecedented sensitivity, starting to explore im ... More
Presented by Mr. Miguel PEIRó on 22 May 2013 at 18:10
In this presentation, the status of the LHAASO is updated mainly about the site preparation and proposing of the project, together with some results using the prototype detectors. As the phase-0, the LAWCA project is going to be covered by the report, including its proposing status. Some progress on ARGO-YBJ analysis is updated as well.
Presented by CAO ZHEN on 24 May 2013 at 10:00
We discuss the energy spectrum of the cosmic rays above 100 GeV that have been derived from measurements of balloon and satelite experiments and from air shower detection. If one uses Peters cycle to describe the spectrum it is difficult to describe with two single power laws before and after the knee. A much better fit is obtained by using more complicated shape.
Presented by Dr. Todor STANEV on 22 May 2013 at 12:15
In the general WIMP scenario, dark matter (DM) can be seen in gamma-rays because photons can found in various DM annihilation or decay processes, either as broad-band or line emission or because of secondary processes of charged particles in the final stages of annihilations or decays. The energy range of the former processes is accessible by current ground-based Imaging Atmospheric Cherenkov tele ... More
Presented by Michele DORO on 24 May 2013 at 10:40
The construction of a km3-scale neutrino telescope – the Gigaton Volume Detector (GVD) in Lake Baikal – is the central goal of the Baikal collaboration. During the R&D phase of the GVD project in 2008–2010 years the basic elements of GVD – new optical modules, FADC readout units, underwater communications and trigger systems – have been developed, produced and tested in situ by long-term ... More
Presented by Prof. Zhan-Arys DZHILKIBAEV on 23 May 2013 at 13:00
The study of the cosmic ray anisotropy in the TeV-PeV energy range could provide clues about the origin and propagation of cosmic rays in our galaxy. The measurement of this per-mille-anisotropy requires data sets with several billion cosmic-ray events. A sample of this size has been collected over the last six years by the IceCube neutrino telescope at the south pole, which detects cosmic-ray muo ... More
Presented by Dr. Paolo DESIATI on 22 May 2013 at 17:30
The improved methods of EAS parameters reconstruction in Tunka-133 suitable both for the internal and external shower core position are described. The methods are used for the analysis of data collected during three winter seasons from 2009 till 2012. The primary CR energy spectrum in the range 10^15 – 10^18 eV is presented. The variation of X_max distribution parameters with energy and correspo ... More
Presented by Prof. Vasily PROSIN on 24 May 2013 at 09:00
Recent detailed analysis of the Fermi-LAT data has discovered two giant gamma-ray emission regions, the so-called Fermi bubbles, extending up to ~ 50 degree in Galactic latitude above and below the Galactic center with a width of ~ 40 degree in longitude. The origin of the gamma-ray emission is not clearly understood. Suggested explanations include injection of cosmic-ray nuclei from the Galactic ... More
Presented by Dr. Satyendra THOUDAM on 23 May 2013 at 15:40
The Fermi Large Area Telescope (LAT) has been collecting high-energy gamma rays from 20 MeV to more than 300 GeV for 5 years, and is still performing nearly flawlessly. With about 800 million gamma rays to date, and a uniform coverage of the whole sky, LAT data allowed for the first time high statistics observations of gamma-ray sources of known and diverse classes, like active galaxies, pulsars, ... More
Presented by Luca LATRONICO on 23 May 2013 at 09:20
We report a measurement of the cosmic ray energy spectrum based on the high statistics collected by the surface detector of the Pierre Auger Observatory. Based on the combination of fluorescence detector (FD) and surface detector (SD) and do not rely on detailed numerical simulation or any assumption about the chemical composition. The energy calibration of the observables, which exploits the cor ... More
Presented by Gonzalo RODRIGUEZ FERNANDEZ on 23 May 2013 at 16:45
The new HiSCORE detector concept is based on Cerenkov air-shower detection, using the non-imaging technique. HiSCORE is build for gamma-ray astronomy from 10 TeV to several PeV, and cosmic rays studies from 100 TeV to 1 EeV. It will search for "pevatrons" (ultra-high energy gamma-ray sources), and measure cosmic ray composition and spectrum in the transition range from a supposed Galactic to extra ... More
Presented by Ralf WISCHNEWSKI on 23 May 2013 at 17:45
Cherenkov telescopes can open a new light on several aspects of fundamental physics, providing information complementary to accelerators. In this talk I concentrate on the implications of the characteristics of photon propagation on the existence of light particles coupling to photons, and to possible new physics beyond relativity.
Presented by Alessandro DE ANGELIS on 24 May 2013 at 10:20
Prof. Egidio Longo, Director of the Physics Department
on 22 May 2013 at 09:10
Dark matter is one of the most important scientific goals for neutrino telescopes. These instruments have particular advantages with respect to other experimental approaches. Compared to direct searches, the sensitivity of neutrino telescopes to probe the spin-dependent cross section of WIMP-proton is unsurpassed. On the other hand, neutrino telescopes can look for dark matter in the Sun, so a pot ... More
Presented by Dr. Juan de Dios ZORNOZA on 22 May 2013 at 16:30
The SNRW44 plays a crucial role in our understanding of the Cosmic Ray origin. Recently, AGILE and Fermi-LAT data have determined, for the first time in a supernova remnant, that the gamma-ray emission from W44 can be attributed to accelerated proton/ions. We present new W44 AGILE data and compare them with the recent Fermi data, in the light of new NANTEN2 telescope CO results. Our analysis pro ... More
Presented by Mrs. Martina CARDILLO on 22 May 2013 at 15:15
A large fraction of unidentified TeV gamma-ray sources observed in the Galaxy are spatially extended, raising the question of why there are so few point-like VHE sources. The study of these objects is important because the extended emission could be the result of cosmic ray interactions with the ambient medium which provides the target to produce TeV gamma-rays. Since the instrument sensitivity d ... More
Presented by Dr. Silvia VERNETTO on 23 May 2013 at 15:20
The DAMA/LIBRA set-up (about 250 kg highly radiopure NaI(Tl)) is running at the Gran Sasso National Laboratory of INFN. The positive results obtained by exploiting the model independent annual modulation signature for the presence of Dark Matter particles in the galactic halo will be discussed. The data satisfy all the many requirements of the Dark Matter annual modulation signature at high confid ... More
Presented by Pierluigi BELLI on 22 May 2013 at 16:50
In its almost 5 years mission, the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope has detected around 40 Gamma-Ray Bursts above 100 MeV. The high energy observations of Gamma-ray Bursts by Fermi-LAT gave rise to many recent theoretical challenges. The talk will present an overview of the general properties of GRBs in the high energy band and their theoretical implicat ... More
Presented by Francesco LONGO
With the recent development of experimental techniques that have opened new windows of observation of the cosmic radiation in all its components, multi-messenger astronomy is entering an exciting era. Many astrophysical sources and cataclysmic cosmic events with burst activity can be plausible sources of concomitant gravitational waves (GWs) and high-energy neutrinos (HENs). Such messengers could ... More
Presented by Dr. Irene DI PALMA on 24 May 2013 at 12:30
The AGILE satellite detected several episodes of transient gamma-ray emission from Cygnus X-3. Cross-correlating the AGILE light curve with both X-ray and radio monitoring data, we found that the main events of gamma-ray activity were detected while the system was in soft spectral X-ray states, that coincide with local and often sharp minima of the hard X-ray flux, a few days before intense radio ... More
Presented by Dr. Giovanni PIANO on 23 May 2013 at 17:00
Gamma-ray observations by the AGILE satellite during the period mid-2007-2010 of the black hole binary system Cygnus X-1 will be presented. The source was observed both in the most common hard state and during a remarkably prolonged `soft state' phase (June 2010 -- May 2011). Previous 1--10 MeV observations of Cyg X-1 in this state hinted at a possible existence of a non-thermal particle componen ... More
Presented by Dr. Sabina SABATINI on 23 May 2013 at 16:45
The Crab Nebula, one of the most studied objects in high energy astrophysics, was discovered to produce strong and short gamma-ray flares by the AGILE satellite. More recently a slower and less intense component of enhanced emission was deteceted in gamma rays. This transient gamma-ray emission leads to substantially revise current models of particle acceleration in Pulsar Wind Nebulae. The South- ... More
Presented by Mr. Edoardo STRIANI on 23 May 2013 at 15:55