Dr
Bela Majorovits
(Max-Planck-Institut für Physik (DE))
05/07/2012, 09:00
Track 8. Neutrinos
Parallel Sessions
Neutrinoless double-beta decay (DBD) could answer the key question regarding the Majorana or Dirac nature of neutrinos and give an answer to the unknown absolute mass scale as well as on the neutrino mass hierarchy.
High-Purity Germanium (HPGe) detectors are extremely sensitive tools for the search of neutrinoless DBD. This is demonstrated by the GERDA (GERmanium Detector Array) experiment...
Dr
Sergio Di Domizio
(University of Genoa & INFN (IT))
05/07/2012, 09:15
Track 8. Neutrinos
Parallel Sessions
Cuore (Cryogenic Underground Observatory for Rare Events) is a second generation neutrino-less double beta decay experiment whose sensitivity is expected to be in the range of 41-95 meV for the electron neutrino effective mass. In Cuore the decay of 9.6 10**26 Te-130 nuclei (206 kg) is observed by means of 988 TeO2 crystals acting as bolometers at very low temperature (~10 mK).
The experiment...
Dr
Peter C. Rowson
(SLAC (US))
05/07/2012, 09:30
Track 8. Neutrinos
Parallel Sessions
The EXO collaboration is searching for neutrinoless double beta decay in 136Xe. Observation of this process would establish the Majorana nature of neutrinos and lepton number violation, while determining an absolute mass scale for neutrinos. The EXO-200 detector is a ultra low background TPC, with an active mass of ~100 kg of liquid xenon enriched to 80.6% in the isotope 136. The detector is...
Prof.
Karol Lang
(University of Texas at Austin (US))
05/07/2012, 09:45
Track 8. Neutrinos
Parallel Sessions
The NEMO-3 experiment, designed to search for neutrinoless double beta decay, was carried out from 2003 to 2011 in the Modane Underground Laboratory in the Frejus Tunnel. The detector employed thin isotopic foils surrounded by a drift chamber and scintillator blocks to reconstruct topology, energy, and timing features of nuclear decays. This multi-observable technique offers a powerful means...
Dr
Satoru Yamada
(Tohoku University (JP))
05/07/2012, 10:00
Track 8. Neutrinos
Parallel Sessions
KamLAND-Zen is an experiment for neutrino-less double-beta decay search with 136Xe.
A newly constructed balloon was installed inside the current 13m diameter KamLAND balloon and filled with 136Xe loaded liquid scintillator in 2011. The data taking was started in October 2011 and the first physics results were obtained with an exposure of 77.6 days with 129 kg of 136Xe. We measured the two...
Dr
Volker Hannen
(University of Münster (DE))
05/07/2012, 10:15
Track 8. Neutrinos
Parallel Sessions
The KATRIN experiment aims at a direct and model independent determination of the neutrino mass with 200 meV sensitivity (90% C.L.) via a measurement of the endpoint region of the tritium beta-decay spectrum. The main components of the experiment are a windowless gaseous tritium source (WGTS), differential and cryogenic pumping sections and a tandem of a pre- and a main-spectrometer, applying...
Dr
Pau Novella Garijo
(CIEMAT (ES))
05/07/2012, 11:00
Track 8. Neutrinos
Parallel Sessions
The Double Chooz experiment presented in November 2011 a first indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. The observed deficit in the neutrino rate, along with the distortion of the neutrino energy spectrum, is interpreted as a consequence of the oscillation driven by the mixing angle theta_13. In 2012, a second analysis has been performed...
Dr
Liangjian Wen
(Institute of High Energy Physics (CN))
05/07/2012, 11:15
Track 8. Neutrinos
Parallel Sessions
The neutrino mixing angle θ13 is the gateway of studying CP violation in lepton sectors and determines the trend of future neutrino experiments. The Daya Bay Reactor Neutrino Experiment aims to precisely determine θ13, with the design sensitivity better than 0.01 in sin^22θ13 at the 90% C.L. The experiment takes a near-far relative measurement by comparing the observed electron-antineutrino...
Dr
Giles Barr
(Oxford University (UK))
05/07/2012, 11:30
Track 8. Neutrinos
Parallel Sessions
The MINOS experiment finished data collection in April this year. We have made precision measurements of the oscillation parameters using both neutrino (10.7e20pot) and anti-neutrino (3.3e20pot) enhanced beams and with atmospheric neutrinos (37.9 kt.y). The atmospheric neutrino sample can also be separated into neutrino and antineutrino samples with the magnetic field in the far detector....
Dr
Ken Sakashita
(KEK (JP))
05/07/2012, 11:45
Track 8. Neutrinos
Parallel Sessions
The Tokai to Kamioka (T2K) experiment is a long baseline neutrino oscillation experiment situated in Japan. A high intensity neutrino beam is produced at the Japan Proton Accelerator Research Complex, in Tokai, Japan. A near detector complex, situated 280 m from the neutrino production target, and the far detector at 295 km, are used to detect the neutrinos from this beam. This talk will...
Ms
Melody Ravonel
(University of Geneva (CH))
05/07/2012, 12:00
Track 8. Neutrinos
Parallel Sessions
We present the first measurement of the muon neutrino spectrum at the T2K near detector, ND280, using the data collected at the JPARC accelerator facility in Tokai, Japan. ND280 is located 280 meters downstream from the target and 2.5^o off-axis from the direction of the beam. The measured spectrum at ND280 constrains the flux and cross section uncertainties in the T2K oscillation analysis. We...
Dr
Glenn Lopez
(Stony Brook University (US))
05/07/2012, 12:15
Track 8. Neutrinos
Parallel Sessions
The T2K experiment is a long baseline neutrino oscillation
experiment designed for the primary goal of measuring oscillations of muon neutrinos to electron neutrinos, thereby providing an appearance measurement of theta_13. One of the major backgrounds of the electron neutrino appearance measurement is from neutral current muon neutrino interactions where a single neutral pion is produced...
Mr
Rick Snider
(Fermi National Accelerator Laboratory (US))
05/07/2012, 12:30
Track 8. Neutrinos
Parallel Sessions
MINERvA (Main INjector Experiment for v-A) is a neutrino scattering experiment, employing a fine-grained detector with an eight ton active target region, located in the NuMI high-intensity neutrino beam at the Fermi National Accelerator Laboratory. MINERvA was designed to make precision measurements of low energy neutrino and antinuetrino cross sections on a variety of different materials...
Dr
Heather Ray
(University of Florida (US))
05/07/2012, 14:00
Track 8. Neutrinos
Parallel Sessions
A precise knowledge of the neutrino cross sections at ~1 GeV on nuclear targets is required to determine the remaining neutrino oscillation parameters accurately. Until recently, our knowledge of neutrino interactions was based on measurements from 20-year old bubble chamber experiments on hydrogen and deuterium targets. As a result, the systematic uncertainties due to neutrino cross...
Prof.
Richard Hill
(University of Chicago (US))
05/07/2012, 14:15
Track 8. Neutrinos
Parallel Sessions
Quasielastic neutrino-nucleon scattering is a basic signal process for neutrino oscillation studies. At accelerator energies, the corresponding cross section is subject to significant uncertainty due to the poorly constrained axial-vector form factor of the nucleon. A model-independent description of the axial-vector form factor is presented. Data from the MiniBooNE experiment for quasielastic...
Prof.
Mitchell Soderberg
(Syracuse University (US))
05/07/2012, 14:30
Track 8. Neutrinos
Parallel Sessions
Liquid argon time projection chambers provide an extraordinary level of information about the interactions of neutrinos. There are several different efforts ongoing at Fermi National Accelerator Laboratory to develop the liquid argon detector technology and utilize it to study neutrino interactions. Among these are the Argon Neutrino Teststand, or ArgoNeuT, project and the MicroBooNE...
Prof.
Maximiliano Sioli
(INFN (IT))
05/07/2012, 14:45
Track 8. Neutrinos
Parallel Sessions
The possibility of mixing between standard active neutrinos and neutrino fields which are singlets under the gauge symmetries of the Standard Model was proposed a long time ago. Recent tensions between world-wide experimental data renewed the possibility of at least a sterile neutrino state to explain the observations. While a huge effort is being devoted to resolve the standard three-neutrino...
Prof.
Maximiliano Sioli
(INFN (IT))
05/07/2012, 15:00
Track 8. Neutrinos
Parallel Sessions
The OPERA neutrino experiment is placed in the CERN Neutrino beam to Gran Sasso (CNGS), 730 km from the beam source at CERN, in the underground Gran Sasso Laboratory.
With the aim to measure the neutrino velocity on this baseline with higher accuracy than previous studies using accelerator neutrinos, dedicated upgrades of the CNGS timing system and of the OPERA detector were undertaken, as...
Dr
Marilisa De Serio
(INFN (IT))
05/07/2012, 15:15
Track 8. Neutrinos
Parallel Sessions
The OPERA neutrino detector built in the underground Gran Sasso Laboratory is designed to detect muon-neutrino to tau-neutrino oscillations in direct appearance mode. The hybrid apparatus consists of an emulsion/lead target complemented by electronic detectors. It is placed in the long-baseline CERN to Gran Sasso neutrino beam (CNGS) 730 km away from the source.
The running of the experiment...
Dr
Silvestro Di Luise
(ETH-Zurich Institute for Particle Physics (CH))
05/07/2012, 15:30
Track 8. Neutrinos
Parallel Sessions
LAGUNA (Large Apparatus for Grand Unification and Neutrino Astrophysics)-LBNO(Long-Baseline Neutrino Oscillation)* is the proposal for a long baseline neutrino oscillation experiment with a new conventional neutrino beam aimed at a next generation deep-underground neutrino observatory composed of a double phase liquid Argon detector and a magnetized iron calorimeter located at the Pyhsalami...
Dr
Jonathan Paley
(Argonne National Laboratory (US))
05/07/2012, 16:00
Track 8. Neutrinos
Parallel Sessions
With the recent discovery of a non-zero value of the neutrino mixing angle $\theta_{13}$, the NuMI Off-Axis $\nu_e$ Appearance (NO$\nu$A) long baseline neutrino oscillation experiment, currently under construction, has unique sensitivity to both the CP-violating neutrino mixing phase and the neutrino mass-hierarchy. Beyond NO$\nu$A, the proposed Long-Baseline Neutrino Experiment (LBNE) is...
Dr
Hiroyuki Sekiya
(Kamioka Observatory ICRR University of Tokyo)
05/07/2012, 16:15
Track 8. Neutrinos
Parallel Sessions
We propose the Hyper-Kamiokande (Hyper-K) detector as a next generation underground water Cherenkov detector. It will serve as a far detector of a long baseline neutrino oscillation experiment envisioned for the upgraded J-PARC, and as a detector capable of observing -- far beyond the sensitivity of the Super-Kamiokande (Super-K) detector -- proton decays, atmospheric neutrinos, and neutrinos...
Prof.
Kenneth Long
(Imperial College London (UK))
05/07/2012, 16:30
Track 8. Neutrinos
Parallel Sessions
Exciting prospects for the discovery of CP violation in the neutrino sector have recently been made more likely by the measurement of the neutrino mixing angle theta_13. CP violation is a necessary condition for leptogenesis to be at the origin of the matter-antimatter asymmetry of the universe. A number of future options for establishing CP violation in neutrinos are possible, but the...
Mr
Suprabh Prakash
(Indian Institute of Technology - Bombay (IN))
05/07/2012, 16:45
Track 8. Neutrinos
Parallel Sessions
Neutrino oscillation physics stands at an important juncture today. With the reactor experiments having measured a moderately large value of $\theta_{13}$, determination of the neutrino mass hierarchy and $\delta_{CP}$ are the next problems to be solved. In this work, we explore the physics potential of T2K and NOvA, with the aim of extracting as much physics as possible from them before the...
Prof.
Stefan Antusch
(University of Basel (CH))
05/07/2012, 17:00
Track 8. Neutrinos
Parallel Sessions
What is the origin of the observed fermion masses and mixing parameters? Neutrinos, with their small mass and large mixing, contribute an important part of this flavour puzzle. We discuss new developments regarding the flavour puzzle in the light of the recent discovery of comparatively large leptonic mixing theta_13. The new developments include the possibility to explain the observed value...
Prof.
Kaladi S. Babu
(Oklahoma State University (US))
05/07/2012, 17:15
Track 8. Neutrinos
Parallel Sessions
Unified theories based on SO(10) are ideal settings to address the masses and mixings of neutrinos. In minimal SO(10) models there are just two Yukawa coupling matrices, one associated with a 10 and one with a 126 of Higgs bosons (as opposed to five such matrices in the standard model). This results in a predictive framework for the neutrinos: all neutrino mixing angles and mass ratios can...
Prof.
Paul Fraser Harrison
(University of Warwick (UK))
05/07/2012, 17:30
Track 8. Neutrinos
Parallel Sessions
In 2004, two of us published a texture, the ``Simplest'' neutrino mass matrix, which predicted $\sin{\theta_{13}}=\sqrt{2\Delta m^2_{sol}/3\Delta m^2_{atm}}$ and large $\delta_{CP}$. Using today's measured values for neutrino mass-squared differences, this
prediction gives $\sin^2\! 2{\theta_{13}}\simeq 0.086^{+0.003}_{-0.006}$, compared with a measured value, found by averaging the results...
Prof.
Tommy Ohlsson
(KTH Royal Institute of Technology (SE))
05/07/2012, 17:45
Track 8. Neutrinos
Parallel Sessions
In this talk, we investigate renomalization group running of neutrino parameters such as neutrino masses and leptonic parameters in different models. The models range from the inverse seesaw model to radiative versions of the scotogenic model as well as extra-dimensional models with both one and two extra spatial dimensions. We find that most models lead to large running for theta_12, whereas...
