# XIV International Workshop on Neutrino Telescopes

Europe/Rome
Participants
• Alberto Guglielmi
• Albrecht Karle
• Aldo Serenelli
• Alessandra Carlotta Re
• Alessandra Tonazzo
• Alessandro Baldini
• Alessandro Melchiorri
• Alexandre Sousa
• Alfredo Giuseppe Cocco
• Anatael Cabrera Serra
• Andre Rubbia
• Andrea Longhin
• Angela Dora Vittoria Di Virgilio
• Angela Fava
• Antonio Caciolli
• Antonio Masiero
• Apostolos Tsirigotis
• Art McDonald
• AURORA MERONI
• Barbara Ricci
• Biagio Saitta
• Boris Popov
• Carlo Broggini
• Carlo Giunti
• Carlo Rubbia
• Chiara Brofferio
• Christof Wetterich
• Daniel Bertrand
• Daniela Bagliani
• daniele fargion
• Daniele Gibin
• David Nygren
• Dieter Haidt
• Elena Aprile
• elena wildner
• Eligio Lisi
• Emanuela Meroni
• Emilio Migneco
• Fabio Mantovani
• Felix Aharonian
• Ferruccio Feruglio
• Francesco Arneodo
• Francesco Iachello
• Francesco Pietropaolo
• Francesco RONGA
• Franco Buccella
• Gabor Domokos
• Gabriella Sartorelli
• Geoffrey Mills
• Gianluigi Fogli
• Gianmaria Collazuol
• Gianni Fiorentini
• Giovanni Busetto
• Giovanni Costa
• Graciela Gelmini
• Guido Altarelli
• Hanna Wacklin
• Hirotaka Sugawara
• Hisakazu Minakata
• Ilias Efthymiopoulos
• Irina Shakiryanova
• Jacob Schneps
• James Stone
• Jean-Jacques Aubert
• John Learned
• Jose R Alonso
• Juergen Brunner
• Karl Giboni
• Ken Long
• Koichiro Nishikawa
• Kunio Inoue
• Lars Bergstrom
• Laura Cardani
• Laura Patrizii
• leo stodolsky
• Leonidas Resvanis
• Lorena Escudero
• Luca Merlo
• Luca Stanco
• LUCIA VOTANO
• Luke Corwin
• Manfred Lindner
• Marco Giulio Giammarchi
• MARCO LAVEDER
• Marco Selvi
• Maria Cristina Volpe
• Maria Teresa Muciaccia
• Mario Greco
• Mario Spinetti
• Mary Bishai
• Mauro Mezzetto
• Michele Maltoni
• Monique SIGNORE
• Noboru SASAO
• Oleg Kalekin
• Olga Ryazhskaya
• Panagiotis Stamoulis
• Paolo Lipari
• Paschal Coyle
• Pasquale Di Bari
• Per-Olof Hulth
• Petros Rapidis
• Piera Sapienza
• Pierre Le Coultre
• Pierrick Hanlet
• Pilar Hernandez
• Pomita Ghoshal
• Purna Chandra Poudel
• R. Jeffrey Wilkes
• Rino Persiani
• Salvatore Viola
• Samoil Bilenky
• Sandip Pakvasa
• Sanmi Stephen Ewenla
• Saverio Simone
• Seon-Hee Seo
• Sergio Navas
• SILVANO PETRARCA
• Soo-Bong Kim
• Spyros Tzamarias
• stavros Katsanevas
• Stefan Schoenert
• Stephen Parke
• Steve Biller
• Steve King
• Subir Sarkar
• Susan Kovesi-Domokos
• Takashi Iida
• Takashi Kobayashi
• Takashi Yoshida
• Teresa Montaruli
• Thierry Lasserre
• Thomas Gaisser
• Thomas Schwetz
• Tie-Jun Gao
• Todor Stanev
• Tommaso Dorigo
• Tommy Ohlsson
• Ubaldo Dore
• Umut Kose
• Valery Gorbachev
• Victor Matveev
• Vincenzo Flaminio
• Vittorio Paolone
• Walter Fulgione
• Yifang Wang
• Yoichiro Suzuki
• Yves Declais
Support
• Tuesday, March 15
• Tuesday Morning Session I
Convener: Prof. Carlo Bemporad (INFN, Pisa)
• 1
Neutrino Oscillations Measurements: Past and Present
Speaker: Prof. Art McDonald (Queen's University)
• 2
Overview of Neutrino Physics Phenomenology
Speaker: Dr Eligio Lisi (INFN Bari)
• 3
Solar Neutrinos and the Sun
Speaker: Dr Aldo Serenelli (Institute of Space Sciences, Bellaterra)
• 10:45 AM
Coffee Break
• Tuesday Morning Session II
• 4
SuperKamiokande
Speaker: Prof. r.jeffrey Wilkes (University of Washington, Seattle)
• 5
Speaker: Prof. Steven Biller (Oxford University)
• 6
GeoNeutrinos
Speaker: Prof. Gianni Fiorentini (INFN Laboratori Nazionali Legnaro)
• 7
Borexino
Speaker: Dr Emanuela Meroni (INFN Milano)
• 1:10 PM
Lunch
• Tuesday Afternoon Session I
• 8
OPERA
Speaker: Dr Laura Patrizii (INFN Bologna)
• 9
ICARUS and Status of the Liquid Argon Technology
Speaker: Dr Francesco Pietropaolo (INFN Padova)
• 10
MINOS
Speaker: Dr Luke Corwin (Indiana University)
• 4:20 PM
Coffee Break
• Tuesday Afternoon Session II
• 11
Physics of Neutrinoless Double Beta Decay
Speaker: Prof. Francesco Iachello (Yale University)
• 12
Sense and Sensitivity of Double Beta Decay Experiments
Speaker: Prof. Juan Jose Gomez-Cadenas (IFIC Valencia)
• 13
CUORE
Speaker: Dr Chiara Brofferio (MIB)
• 14
GERDA
Speaker: Prof. Stefan Schönert (Technische Universität München)
• Wednesday, March 16
• Wednesday Morning Session I
• 15
Results from the MEG Experiment
Speaker: Alessandro Massimo Baldini (PI)
• 16
Lepton Flavor Violation and Neutrino Physics
Speaker: Paride Paradisi (TU of Munich)
• 17
Neutrinos and SuperNovae
Speaker: Dr Cristina Volpe (IPN Orsay)
• 10:20 AM
Coffee Break
• Wednesday Morning Session II
• 18
Cosmology and Neutrino Masses
Speaker: Alessandro Melchiorri (RM1)
• 19
Direct Dark Matter Searches: Fits to the WIMP Candidates
Speaker: Graciela Gelmini (UCLA)
• 20
Results from the XENON100 Experiment
Speaker: Elena Aprile (Columbia University)
• 12:30 PM
Lunch
• Wednesday Afternoon Session I
Convener: Prof. Antonio Masiero (INFN, Padova)
• 21
Neutrino Mass Models: how could be constrained by Results from Neutrino Oscillations?
Speaker: S.F. King (University of Southampton)
• 22
New Physics in the Atmospheric Sector: non-Standard Interactions and CPT Violation.
• 23
The Reactor Antineutrino Anomaly.
Speaker: Thierry Lasserre (CEA Saclay)
• 24
Reactor Anomaly, Theta13, and Sterile Neutrinos
Speaker: Thomas Schwetz (Max-Planck-Institute for Nuclear Physics)
• 4:15 PM
Coffee Break
• Wednesday Afternoon Session II
• 25
T2K Results
Speaker: Andre Rubbia (ETH Zurich)
• 26
NOvA
Speaker: Alexandre Sousa (Harvard University)
• 27
Double Chooz
Speaker: Anatael Cabrera Serra (IN2P3/CNRS-APC)
• 28
Daya Bay and Future Prospects
Speaker: Prof. Yifang Wang (Institute of High Energy Physics Beijing)
• 29
RENO
Speaker: Soo-Bong Kim (Seoul National University)
• Poster session
• 30
Opportunities of Gallium experiments with artificial neutrino sources for investigation of transition to sterile states
The search for sterile neutrinos, as well as for CP and CPT violation in the neutrino sector is now a field of most active investigation. The unexpectedly low capture rate of neutrinos in Ga source experiments in SAGE as well as in GALLEX can be explained by assuming transitions from active to sterile neutrinos occur with mass-squared difference Δm2 about 1 eV2. This interpretation agrees with the results of reactor experiments Bugey, Chooz, and Goesgen and the accelerator experiments LSND and MiniBooNE. We propose to place a very intense source of 51Cr at the center of a 50-tonne target of gallium metal that is divided into two zones and to measure the neutrino capture rate in each zone. The proposed experiment has the potential to test neutrino oscillation transitions with mass-squared difference Δm2 > 0.5 eV2. This capability exists because the experiment uses a compact nearly monochromatic neutrino source with well-known activity, the dense target of Ga metal provides a high interaction rate, and the special target geometry makes it possible to study the dependence of the rate on the distance to the source. The sensitivity to disappearance of electron neutrinos is expected to be a few percent.
Speaker: Valery Gorbachev (INR, Moscow.)
• 31
From paired super-radiance to neutrino mass spectroscopy using atoms
We present some preliminary results of our experiment which aims to prove the principle of the “macro-coherent amplification mechanism”, a new amplification mechanism which exploits coherence of particles involved in de-excitation processes. When this mechanism is in operation, decay rates, such as emission of neutrino-pair and photon from excited atoms, become proportional to N2 (not to N), where N is the number of excited atoms in a coherent volume. Unlike Dicke’s super-radiance, which is also a coherent phenomenon (and thus ∝ N2), its coherence volume can be made macroscopic when a certain phase matching condition is satisfied among the outgoing particles. Our ultimate goal is to use this mechanism for investigating neutrino properties: determination of the absolute mass scale, Dirac/Majorana distinction, and measurement of Majorana phases, among others.
Speaker: N. Sasao (Okayama University)
• 32
LUCIFER: A Scintillating Bolometer Array for the Search of Neutrinoless Double Beta Decay
In recent years important results have been obtained in the study of neutrino's properties, but the fundamental character of the particle (Dirac or Majorana) and its absolute mass are still open questions. Neutrinoless Double Beta Decay (DBD) is a unique tool to discriminate the neutrino nature, since the observation of this rare process would imply that neutrinos are Majorana particles and would set a limit on the mass of the electron neutrino. Bolometric detectors are particularly suitable for the search of DBD: they can provide a good versatility in the choice of material and they can achieve a good energy resolution, a high electronciency and a low background. The last point, in particular, represents the main challenge for the next generation experiments. A major role in this ^Leld could be played by LUCIFER (Low-background Underground Cryogenic Installation For Elusive Rates), whose goal is the study of the DBD of 82Se through the achievement of a background on the order of 0.001 counts/kg/keV/year. The LUCIFER detector will be an array of ZnSe scintillating bolometers. The simultaneous measurement of the heat and of the light emitted by an interaction will allow to discriminate between diㄦent interacting particles, providing thus a disentangled and reduced background. In this poster the scintillating bolometers technique will be presented, as well as the features of the ZnSe crystals and the expected performances.
Speaker: Laura Cardani (Universita di Roma La Sapienza)
• 33
Improving the KM3NeT sensitivity
KM3NeT is a future European research infrastructure that will host a neutrino telescope with an instrumented volume of at least one cubic kilometre, located at the bottom of the Mediterranean Sea at a depth of several kilometres. Detection of high-energy neutrinos from distant astrophysical sources or from annihilation of dark matter particles will open a new window on the Universe. The detection principle exploits the measurement of Cherenkov light emitted by charged particles resulting from neutrino interactions in the matter surrounding the telescope. The innovative KM3NeT detection units will be instrumented with multi-PMT optical modules (OM) containing 31 3-inch phototubes. The segmentation of the detection area in the OM will aid in distinguishing single-photon from multi-photon hits. Moreover, two-photon hits can be unambiguously recognized if the two photons hit separate tubes, which occurs with 85% probability for photons arriving from a particular direction. Small phototubes can offer a quantum efficiency above 30%, provide a small transit time spread and are do not require shielding from the Earth’s magnetic field. Three companies ET Enterprises, Hamamatsu and MELZ-FEU develop new types of 3-inch PMTs for the KM3NeT project. First PMT samples have been delivered from the companies and tested. These results are presented. In order to maximize the detector sensitivity, each phototube in the multi-PMT OM will be surrounded by a reflector cone designed to collect photons that would normally miss the photocathode, thus effectively increasing the effective photocathode area. Measurements will be presented that indicate an increase of the effective photocathode radius by about 8 mm. Light propagation studies have shown that an increase in the overall sensitivity by 25% is possible.
Speaker: Dr Oleg Kalekin (Erlangen Centre for Astroparticle Physics, University of Erlangen)
• 34
Uncovering Multiple CP-Nonconserving Mechanisms of Neutrinoless Double Beta Decay
We consider the possibility of several different mechanisms contributing to the Neutrinoless Double Beta Decay amplitude in the general case of CP nonconservation: light Majorana neutrino exchange, heavy left-handed (LH) and heavy right-handed (RH) Majorana neutrino exchanges, lepton charge non-conserving couplings in SUSY theories with R-parity breaking. If the Neutrinoless Double Beta Decay is induced by, e.g., two non-interfering'' mechanisms (light Majorana neutrino and heavy RH Majorana neutrino exchanges), one can determine the absolute values of the two fundamental parameters, characterising these mechanisms, from data on the half-lives of two nuclear isotopes. In the case when two interfering'' mechanisms are responsible for the Neutrinoless Double Beta Decay, the absolute values of the two relevant parameters and the interference term can be uniquely determined from data on the half-lives of three nuclei. The method considered by us can be generalised to the case of more than two $\betabeta$-decay mechanisms. It has also the advantage that it allows to treat the cases of CP conserving and CP nonconserving couplings generating the $\betabeta$-decay in a unique way.
Speaker: Aurora Meroni (SISSA, Trieste)
• 35
SNO+ experiment as a Neutrino Telescope
SNO+ is a large scale liquid scintillator detector that is the successor experiment to the Sudbury Neutrino Observatory, located in SNOLAB near Sudbury, Canada. SNO+ is under construction and will detect neutrinos using a 12m diameter acrylic sphere filled with approximately 800 tonnes of liquid scintillator and monitored by about 10,000 photomultiplier tubes. We plan to study solar neutrinos, supernova neutrinos, geo neutrinos and reactor neutrinos as well as neutrinoless double beta decay. Supernova relic neutrinos (the diffuse supernova neutrino background) are also an interesting physics goal. Because of the very small muon rate and smaller reactor flux than KamLAND, the sensitivity to supernova relic neutrinos at lower energies will be very good. In this poster, "SNO+ experiment as a neutrino telescope" will be presented. The main focus is on the physics goals for solar neutrinos and supernova neutrinos. Preliminary studies of the supernova relic neutrino sensitivity will also be presented.
Speaker: Takashi Iida (Queen's University)
• 36
Leptogenesis in a scenario inspired to SO(10) with a compact spectrum for the right-handed neutrinos
In the framework of the see-saw model and reasonoble hypotheses within SO(10), Dirac matrix with hyerarchical eigenvalues and mass and flavour eigenvectors related by a matrix similar to the CKM matrix, one may obtain the scenario where baryogenesis is realized through leptogenesis and get predictions for the neutrino masses in tritium and in double neutrino-less beta decays
Speaker: Franco Buccella (Universita di Napoli)
• 37
Effects of Resonant Spin-Flavor Conversion of Supernova Neutrinos in Supernova Neutrino Event
If neutrinos are Majorana particles and have finite transition magnetic moment with about 10−12μB, where μB is Bohr magnetons, a spin precession between a left-handed neutrino and a right-handed antineutrino with different flavor occurs in strong magnetic field. This is called resonant spin-flavor (RSF) conversion. Supernova (SN) neutrino event is one of the most promising neutrino events to find evidence for the RSF conversion. The magnetic field of Fe core of a presupernova star is evaluated to become about 1010 gauss. Observations of pulsars indicated that neutron stars have magnetic field of about 1012 gauss. Such a strong magnetic field in the innermost region of a SN ejecta would allow the flavor change by the RSF conversion. Recent studies of SN explosions indicated that a SN forms a hot-bubble region above the neutrino sphere and that electron-mole fraction Ye in this region exceeds 0.5 in several seconds after the core collapse. We investigated the dependence of the RSF conversion and SN neutrino spectra on electron-mole fraction using a SN explosion model of a 15M⊙ star. The RSF conversion of nubar(e) $nu(mu,tau) occurs at a high RSF resonance in normal mass hierarchy and Ye > 0.5 or inverted mass hierarchy and Ye < 0.5. In other cases, the RSF conversion of e$ ¯μ, occurs. If SN neutrinos are affected by the RSF conversion and the Ye value in the hot-bubble region changes with time, largetime variation of the SN neutrino spectra would be observed. When the adiabaticity of a high RSF resonance changes by the shock passage, the SN neutrino spectra also change. In the poster presentation, we show the time variation of the event number ratio of low nubar(e) energy to high nubar(e) energy as the SN neutrino spectra. We discuss the dependence of the time variation of the event number ratio on neutrino oscillation parameters and neutrino magnetic moment.
Speaker: Takashi Yoshida (Department of Astronomy, University of Tokyo)
• 38
Remarks on the forces generated by two-neutrino exchange
We have evaluated the effect of neutrino masses on the long--range potential due to the exchange of a neutrino-antineutrino pair between two particles carrying weak charge. We considered in particular two electrons. This brings up--to--date calculations present in the literature for massless neutrinos. We considered for the first time the effect of a hypothetical neutrino magnetic moment on the potential. We noted that these terms are very often dominant over the weak contribution to the potential but it still remain too small to be observable.
Speaker: Silvano Petrarca (Universita di Roma La Sapienza)
• 39
A road to reach higher precision in Borexino: the detector calibration campaigns
Borexino is an experiment designed for real‐time detection of low energy solar neutrinos. It is installed at the Gran Sasso Underground Laboratory and started taking data in May 2007. So far, Borexino’s main results are the first direct measurement of the 7Be solar neutrino signal rate, the measurement of the 8B solar neutrino flux, with 2.8 MeV energy threshold, and the observation of geo‐neutrinos signal. Borexino is confirming the LMA‐MSW solution of the neutrino oscillation scenario by providing new data about the neutrino survival probability as a function of the neutrino energy and proving the absence of a day‐night asymmetry in the 7Be neutrino signal. In this contribution I present the results of the detector calibration campaigns completed in 2009 by the Borexino collaboration. This work was carried out to better understand the detector response in order to improve the 7Be neutrino measurement. Several radioactive sources have been deployed within the inner part of the detector by means of a carefully designed insertion system. The sources were selected in order to study the detector response in the energy region between 122 keV and 7 MeV, with α, β, γ and neutrons.
Speaker: Alessandra Carlotta Re (Universita' degli Studi e INFN di Milano)
• 40
A T' flavour model for fermions and its phenomenology
I will present a supersymmetric flavour model based on the T' discrete group, which explains fermion masses and mixings. The flavour symmetry, acting in the supersymmetric sector, provides well defined sfermion mass matrices and the resulting supersymmetric spectrum accounts for sufficiently light particles that could be seen at LHC. Furthermore, several FCNC processes are switched on and they can be useful to test the model in the present and future experiments. I will review the main results both for the lepton and for the quark sectors.
Speaker: Luca Merlo (Technische Universität München)
• 41
Beta spectroscopy with superconducting calorimeters for the direct measurement of the neutrino mass
The neutrino mass scale is a relevant parameter of the theoretical framework beyond the Standard Model of particle physics. Cosmology constrains to 10meV the sensitivity required for future neutrino mass experiments, that means a huge effort of improving present instrumentation and technology. In this work we show a calorimetric approach for the direct measurement of the neutrino mass by means of 187Re single β decay and 163Ho electron-capture decay. An high sensitivity is achievable thanks to the high responsivity of superconducting microcalorimeters and their low intrinsic noise.
Speaker: Daniela Bagliani (Universita di Genova and INFN)
• 42
Monte Carlo simulation study of the muon-induced neutron flux in LNGS
The ultimate background for all the experiments looking for rare events in underground laboratories is represented by muon-induced neutrons. Their typical flux is three order of magnitude smaller than the flux of neutrons produced by radioactivity, but the former have an harder energy spectrum and they can travel far away from the muon track, thus they are very difficult to shield. The LVD experiment, located at LNGS, consists of a 1000 ton of liquid scintillator and its main goal is the search for neutrinos from Gravitational Stellar Collapses in our Galaxy. LVD can detect both neutrons and muons so it is well suited for studing neutrons induced by cosmic muons. In this work we present the full Monte Carlo simulation, developed in the framework of Geant4, that allowed us to extimate the muon-induced neutron flux coming from the rock and to measure the neutron yield in liquid scintillator and iron. The former has been found in agreement with other measurement while the neutron yield in iron represent the first measurement. The simulation has been also used to evaluate the requirement and the performances of the shield for a dark matter experiment at LNGS.
Speaker: Rino Persiani (Universita di Bologna e INFN)
• 43
Neutrino Mass Hierarchy Determination using Reactor Antineutrinos
Building on earlier studies, we investigate the possibility to determine the type of neutrino mass spectrum (i.e., "the neutrino mass hierarchy") in a high statistics reactor electron antineutrino experiment with a relatively large KamLAND-like detector and an optimal baseline of 60 Km. We analyze systematically the Fourier Sine and Cosine Transforms (FST and FCT) of simulated reactor antineutrino data with reference to their specific mass hierarchy-dependent features discussed earlier in the literature. We perform also a binned \chi2 analysis of the sensitivity of simulated reactor electron antineutrino event spectrum data to the neutrino mass hierarchy, and determine, in particular, the characteristics of the detector and the experiment (energy resolution, visible energy threshold, exposure, systematic errors, binning of data, etc.), which would allow us to get significant information on, or even determine, the type of the neutrino mass spectrum. We find that if \sin2 2\theta_{13} is sufficiently large, \sin2 2\theta_{13} \gtap 0.02, the requirements on the set-up of interest are very challenging, but not impossible to realize.
Speaker: Pomita Ghoshal (SISSA, Trieste)
• 44
The 14N(p,g)15O reaction and the metallicity of the Sun
• 45
An array of ring-lasers to measure the Frame Dragging of the Earth
It has been well known for many years that ring lasers, angular velocity inertial sensors, can be used to measure the Frame Dragging (Lense-Thirring effect) of the Earth provided that the sensor drift can be controlled sufficiently. The ring Laser G in Wettzell (Germany) has shown that a sensitivity of 20nrad/s/sqrt(Hz) can be achieved routinely. Both, sensitivity and accuracy improvements are expected in the near future due to tighter control loops on the system and improvements in mirror making. The 3 groups (NewZealand, Germany and Italy) who work on this kind of devices, have been sharing their experience in order to improve the instrument as much as possible. As a result of this joint effort a new prototype ring will be built in NewZealand in 2011. The Italian group runs the middle size ring G-Pisa, which operates in the central area of Virgo gravitational waves antenna at the moment . Based on the results of G, we have worked out that a system of 6 large gyros will be able to reconstruct the Lense-Thirring effect with a precision of at least 10% in about a month of integration. Improvements in the accuracy of the device would improve the results and 1% of accuracy seems feasible with measurements summing over a few years. Essential for our test is the comparison with the Earth angular rotation as provided by the IERS. In order to reach this ambitious goal, our project requires the construction of a sensor of 2 components, each consisting of two parallel ring lasers, collocated, and oriented along two different axis of orientation, making 4 rings in total. Each ring will be built using the economic modular design, pioneered in the GEOSENSOR project. It is actively controlled using a servo system. The perimeter will be around 24 m, and the geometry should be close to a square with an accuracy of the order of 1 part in 105. We plan to install and test our system in an underground laboratory, such us Laboratori Nazionali del GranSasso (LNGS), in order to reduce the top soil perturbations seen in our other sensors and to achieve very high thermal stability. Beyond fundamental physics, this experiment would be very important for geodesy and geophysics.
Speaker: Angela Di Virgilio (INFN, Pisa)
• 46
A new design for the CERN-Frejus neutrino Super Beam
We present an optimization of the hadron focusing system for a low-energy high intensity conventional neutrino beam (Super-Beam) proposed on the basis of the HP-SPL at CERN with a beam power of 4 MW and an energy of 4.5 GeV. The far detector would be a 440 kton Water Cherenkov detector (MEMPHYS) located at a baseline of 130 km in Fr\'ejus site. The neutrino fluxes simulation relies on a new GEANT4 based simulation coupled with an optimization algorithm based on the maximization of the sensitivity limit on the $\theta_{13}$ mixing angle. A new configuration adopting a multiple horn system with solid targets is proposed which improves the sensitivity to theta(13) and the CP violating phase delta(CP).
Speaker: Andrea Longhin (INFN, Laboratori Nazionali di Frascati)
• 47
The MEMPHYS Project
MEMPHYS is a proposed megaton‐scale Water Cherenkov experiment to be performed deep underground. It is dedicated to nucleon decay searches, neutrinos from supernovæ, solar and atmospheric neutrinos, as well as neutrinos from a future Super‐Beam or β‐Beam to measure the mixing angle θ13, the CP violating phase δ and the mass hierarchy. We will summarize the latest studies on the physics reach of MEMPHYS and on possible candidate sites for its installation in Europe. New photodetection and data acquisition solutions, such as grouped readout systems, are mandatory for very large‐scale detectors, to improve their feasibility and cost effectiveness. One R&D item currently being carried out is MEMPHYNO, a small‐scale prototype with the main purpose of serving as a test bench for new detection and data acquisition devices. Its status and perspectives will be shown.
Speaker: Alessandra Tonazzo (APC Paris)
• 48
Discovery potential of a future very large underwater neutrino telescope in the Mediterranean Sea
We report on the evaluation of the performance of the Mediterranean Very Large Volume Neutrino Telescope, KM3NeT. We present results of our studies concerning the capability of the telescope in detecting/discovering galactic (steady point sources) and extragalactic, transient (Gamma Ray Bursts) high energy neutrino sources as well as measuring ultra high energy diffuse neutrino fluxes. The discovery potential of the neutrino telescope is evaluated for several detector configurations assuming various environmental parameters.
Speaker: Apostolos Tsirigotis (Hellenic Open University)
• 49
Measurements of neutron spectra characteristics using NaCl in LVD
The main goal of LVD detector is the search for neutrino bursts from gravitational stellar collapses in our Galaxy. Adding NaCl to the detector structure allow to increase neutron detection efficiency up to ~20% and thereby increase the number of antineutrino interactions according to standard collapse model. Also it make possible to detect more neutrino interactions for non-standart collapse model.
Speaker: Irina Shakiryanova (INR, Moscow.)
• 50
Analysis of the temperature variations of neutrons generated by muons in the detector LVD.
Russian-Italian large volume detector LVD is located in the Gran Sasso National Laboratory underground at the depth of 3300 m w.e. Data of neutrons generated by muons from April 2003 were analysed to study the seasonal modulation of the cosmic ray penetrating component. Variations of neutron generated by muons were found with a time period of 1 year, with the maximum intensity in July in the agreement with theoretical predictions.
Speaker: Olga Ryazhskaya (INR, Moskow.)
• 51
he T2K TPC calibration tools and relation to physics results
The time projection chambers (TPCs) of the near detector complex, ND280, of the T2K experiment, are presently the main tool for both the tracking and particle identification of charged particles. The calibration of TPCs comprises two main steps: the "low level calibration" (requiring no resonstruction input), related to the charge calibration, and important for the particle identification; and the "high level calibration" (using reconstruction input), including from the drift velocity calibration up to the corrections applied for electric and magnetic field distortions. We present a summary collection of the methods and tools used, and results demonstrating the importance of the calibration effort for the present and future physics results.
Speaker: Panagiotis Stamoulis (IFIC Valencia)
• 52
"Status and performance of ND280, the T2K near detectors"
The T2K near detector suite at 280m distance from the J-PARC neutrino production target (ND280) consists of an on-axis detector (INGRID), and a set of tracking and scintillator detectors inside a 0.2T magnetic field, positioned at the same off-axis angle as the Super-Kamiokande far detector (P0D, SMRD, TPCs, FGD and ECALs). The ND280 detectors will be described, and examples of their performance during the initial neutrino data-taking runs will be reported.
Speaker: Jeffrey Wilkes (University of Washington, Seattle)
• 53
Efforts towards a measurement of charged current quasi-elastic neutrino interactions in ND280.
The peak energy of the very narrow-band neutrino beam that the T2K experiment uses, was selected in such a way that the big majority of neutrino interactions seen in the near detector complex of the T2K experiment, ND280, will be charged-current quasi-elastic (CCQE) interactions. One of the main components of ND280, is the "tracker": a system of alternating finely segmented scintillator-based tracking detectors (fine-grained detectors, FGDs) and time projection chambers (TPCs). The combination of substantial fiducial mass, track and particle identification (PID) information from the FGDs, with the superior tracking and PID capabilities of the TPCs, present an excellent opportunity for detailed measurement of the CCQE interactions in the ND280 detector. We present a detailed Monte-Carlo study of a possible approach to the measurement of CCQE interactions in the ND280 tracker, using mainly the FGD and TPC systems, study possible backgrounds and discuss possible future extentions of the method, before applying it to the actual ND280 data set.
Speaker: Lorena Escudero (IFIC, Valencia)
• 54
Study of Neutrino Interactions Using the Electronic Detectors and Emulsion-Lead Targets of the OPERA Experiment
The OPERA experiment is based on a hybrid technology combining electronic detectors and nuclear emulsions. OPERA collected muon-neutrino interactions during the 2008, 2009 and 2010 physics runs of the CNGS neutrino beam, produced at CERN with an energy range of about 5-35 GeV. A total of 5.3 1019 protons on target equivalent luminosity from the 2008-2009 sample has been analysed using the measurements in the electronic detectors. Charged Current (CC) and Neutral Current (NC) interactions are identified and the NC/CC ratio is computed. The momentum distribution and the charge of the muon tracks produced in CC interactions are analysed. For CC events the Bjorken-y distribution is also measured. Measurements are compared to Monte-Carlo expectations. The OPERA neutrino target brick, based on the so-called Emulsion Cloud Chamber (ECC) technique, of dimensions 12.7x10.2x7.5 cm3, is composed by a sequence of 56 lead plates (1 mm thick) and 57 emulsion films (44μm thick emulsion layers on either side of a 205μm thick plastic base). The total length of a brick corresponds to about 10 X0 where X0 is the radiation length in lead. The angular resolution of the emulsions allows, using the multiple Coulomb scattering of the tracks in the lead plates, the determination of charged particle momentum from several hundreds of MeV/c to a few GeV/c. This range corresponds to the momentum range of secondary hadrons produced in neutrino interactions in the OPERA experiment. Momentum measurements performed by the electronic detectors on soft muon tracks are also compared to the measurement performed in the OPERA emulsion films.
Speaker: Dr Kose Umut (INFN, Padova)
• 55
The Muon Ionization Cooling Experiment
The Muon Ionization Cooling Experiment (MICE) is a high-precision, accelerator experiment being performed at Rutherford Appleton Laboratory in the UK, using particle physics techniques. Its goal is the first demonstration, with 0.1% resolution, of the feasibility of reducing the transverse emittance (beam volume in 4D phase space) of a beam of muons by ionization cooling in low-Z absorbers. Ionization cooling will be a key technique used in creating beams of muons for high-intensity Neutrino Factory(ies) and Muon Collider(s) of the future. MICE is being staged in the following steps: I. Creating and characterizing a beam of muons; II. Measuring their emittance; III. Systematic comparison of successive measurements; IV. Inserting absorber; V. Reaccelerating longitudinally; and VI. Complete 10%-cooling" test. Step I has recently been completed and preliminary results will be shown.
Speaker: Dr Pierrick Hanlet (Illinois Institute of Technology &amp; Fermilab)
• Thursday, March 17
• Thursday Morning Session I
• 56
Results from the MiniBooNE Experiment
Speaker: Dr Geoffrey Mills (Los Alamos National Laboratory)
• 57
Sterile Neutrino Fits
Speaker: Carlo Giunti (INFN)
• 58
Searches for Sterile Neutrinos
Speaker: Prof. Carlo Rubbia (Laboratori Nazionali del Gran Sasso)
• 10:30 AM
Coffee Break
• Thursday Morning Session II
• 59
Neutrino Experiments at the ESS
Speaker: Dr Axel Steuwer (ESS, Lund)
• 60
Neutrino Cross Sections and the MINERvA Experiment
Speaker: Dr Vittorio Paolone (University of Pittsburgh)
• 61
Speaker: Boris Popov (JINR Dubna and LPNHE, Univ. of Paris VI and VII)
• 62
Leptogenesis and Neutrino Masses
Speaker: Pasquale Di Bari (PD)
• 12:45 PM
Lunch
• Thursday Afternoon Session I
• 63
Future Neutrino Beams at CERN
Speaker: Dr Ilias Efthymiopoulos (CERN)
• 64
Neutrino Super Beams at Fermilab
Speaker: Prof. Stephen Parke (Fermilab)
• 65
Beta Beams
Speaker: Dr Elena Wildner (CERN)
• 66
Neutrino Factories
Speaker: Prof. Ken Long (Imperial College, London)
• 4:15 PM
Coffee Break
• Thursday Afternoon Session II
• 67
LAGUNA
Speaker: Prof. Andre Rubbia (ETH Zurich)
• 68
DUSEL
Speaker: Dr Mary Bishai (BNL)
• 69
DAEdALUS
Speaker: Dr Jose Alonso (MIT)
• Friday, March 18
• Friday Morning Session I
• 70
Physics with Neutrino Telescopes
Speaker: Prof. Teresa Montaruli (Wisconsin University, Madison)
• 71
Predicting Galactic Neutrino Fluxes from Gamma Ray Data
Speaker: Prof. Felix Aharonian (Dublin Institute for Advanced Studies (DIAS))
• 72
Diffuse Neutrino Fluxes
Speaker: Dr Juergen Brunner (CPPM Marseille)
• 73
Cosmogenic Neutrinos
Speaker: Prof. Subir Sarkar (Oxford University)
• 74
IceCube: Status and Developments
Speaker: Prof. Tom Gaisser (University of Delaware)
• 11:10 AM
Coffee Break
• Friday Morning Session II
• 75
What do we know about the Origin of Cosmic Rays?
Speaker: Dr Paolo Lipari (INFN Roma)
• 76
Results from the AUGER and other UEHCR experiments