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Agenda
for the parallel workshop sessions in Neutrino Oscillations.
All links marked with a⇓ can be used to show/hide the abstracts and presentations.
Click here to show/hide all presentations and abstracts and here for a print version.
You may also download the compact program booklet (PDF, 1.9 MB)
and an abstract booklet (PDF, 0.4 MB).
As long as authors provided us with PDF versions of their slides, the corresponding downloads are available on this page.
Monday – Sep 5, 2011
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16:50 – 18:45 |
Neutrino Oscillations W1
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Parallel Session (Clubraum 1) – Chair:
Karsten Heeger
16:50
(15' + 5')
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Status of the NOνA experiment⇓
slides
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Brian Rebel (Fermilab)
The long-baseline NOνA experiment is designed to observe appearance of electron neutrinos in a beam of muon neutrinos. If the mixing angle between the first and third neutrino mass eigenstates, θ13, is large enough, NOνA will measure θ13 as well as the neutrino mass hierarchy. It will also provide information about the CP-violating phase, δ. This talk will outline the physics goals of the experiment and the current status of the design and construction of its near
and far detectors. This talk will also present data from the prototype near detector (NDOS), located on the surface at Fermilab. The NDOS began data taking in 2010, and it observes an off-axis neutrino beam from the NuMI beamline and an on-axis neutrino beam from the Booster beam line.
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17:10
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ICARUS and status of liquid argon technology⇓
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Alessandro Menegolli (University and INFN of Pavia)
ICARUS T600 is the largest liquid Argon Time Projection Chamber (LAr TPC) detector ever built, consisting of about 600 tons of LAr mass. It operates underground at the LNGS laboratory in Gran Sasso. It has been smoothly running since summer 2010, collecting data with the CNGS beam and with cosmics. Liquid Argon TPCs are indeed "electronic bubble chambers", providing a completely uniform imaging calorimetry with unprecedented accuracy on such massive volumes. ICARUS T600 is internationally considered as a milestone towards the realization of the next generation of massive detectors (~tens of ktons) for neutrino and rare event physics. Results will be presented on the data collected so far with the detector at LNGS.
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17:30
(12' + 3')
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Neutrino oscillations, energy-momentum conservation and entanglement.⇓
slides
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Evgeny Akhmedov (Max-Planck Institut fuer Kernphysik, Heidelberg)
There is an intricate relationship between neutrino oscillations and energy-momentum conservation. On the one hand, conservation of energy and momentum is an exact law of nature; on the other hand, exact energy and momentum conservation in neutrino production and detection processes would apparently destroy coherence of the emitted or absorbed neutrino states and therefore wash out the oscillations. This dichotomy led to a significant confusion in the literature. I will discuss whether entanglement of neutrinos and recoil particles often invoked for
"saving" the conservation laws in neutrino oscillations is indeed relevant to this process, as well as a number of other subtle issues related to conservation of energy and momentum
in neutrino oscillations.
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17:45
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The Nucifer experiment: Non proliferation with reactor antineutrinos⇓
slides
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Andi Sebastian Cucoanes (CEA Saclay)
In nuclear reactors, antineutrinos are generated in the decay chains of the of the fission products. In consequence, a survey of the neutrino flux close to a reactor provides information related to the uranium and plutonium content of the core. This application arouses the IAEA's interest in using antineutrino detectors as a potential safeguard tool. After a brief review of the existing projects in this field, we present the Nucifer experiment, under development at CEA-Saclay and IN2P3, France. The design of this new neutrino detector has been focused on safety, size reduction, reliability and high detection efficiency (~50%) with a good background rejection. The Nucifer detector is going to be deployed at the CEA-OSIRIS research reactor. First antineutrino event is expected by end 2011.
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18:00
(12' + 3')
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Status of the DANSS project – solid scintillator detector of the reactor antineutrino⇓
slides
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Viacheslav Egorov (Joint Institute for Nuclear Research)
The construction of the 1 m3 detector of the reactor antineutrinos is described. It will consist of 2500 independent cells – 4×1×100 cm3 bars made of polystyrene-based scintillator covered with thin Gd-containing and light-reflecting layer. We estimate the Inversed Beta-Decay registration efficiency as 73%, and expect that, being placed at 10 m distance from the 3 GWth reactor unit #4 of the Kalinin NPP (Russia), the spectrometer would detect about 10000 IBD-events per day. It is planned to be put in operation in 2013 and after measurements at 10, 13 and 18 m distances allow to confirm or to disprove the short-baseline sterile neutrino oscillation hypothesis.
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18:15
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The NA61/SHINE hadron production experiment for T2K: update and recent results⇓
slides
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Sébastien Murphy (University of Geneva)
The NA61/SHINE experiment provides the hadron production cross sections of 30 GeV protons on carbon for the T2K experiment. There are several new results: recently published pion cross-sections with 2007 data; preliminary charged kaon cross-sections with 2007 data; possibly neutral kaon and lambda cross-sections with 2007 and 2009 data; new results and new methodology for the extraction of production results from the long target (replica of T2K). There will be a report on the 2009 and 2010 data taking which will multiply statistics both thin and long target by factor 20. So far most experiments (e.g., SPY and HARP) have done measurements on thin targets but have had no long target data, or difficulty exploiting the long target data.
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Tuesday – Sep 6, 2011
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16:50 – 18:35 |
Neutrino Oscillations W2
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Parallel Session (Clubraum 1) – Chair:
Franz von Feilitzsch
16:50
(15' + 5')
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The Double Chooz experiment⇓
slides
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Patrick Pfahler (Technische Universität München)
Double Chooz is a reactor antineutrino experiment that is currently under construction at the commercial nuclear power plant (NPP) of Chooz in northern France. The experiment aims for the revelation of the last unknown mixing angle Θ13 as a part of the neutrino mixing matrix or the improvement of the upper limit for sin2 (2Θ13) which is currently ≤ 0.14 (90%CL). A newly developed gadolinium-loaded liquid scintillator allows the detection of an electron-anti-neutrinos (νe*) using the distinct pattern of inverse beta decay (νe*+ p → e+ + n). Double Chooz uses two identical detectors which is reducing systematic uncertainties and will allow, after a data taking phase of 4 years, an measurement of sin2(2Θ13) down to ≤ 0.03 (90%CL). The first (far) detector has successfully been filled in winter of 2010. The commissioning of the second (near) detector is expected 1.5 years later and will provide the maximum sensitivity for the experiment.
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17:10
(15' + 5')
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First data with the Daya Bay antineutrino detectors⇓
slides
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Karsten Heeger (University of Wisconsin)
The Daya Bay reactor neutrino experiment is designed to measure the last unknown neutrino mixing angle θ13 with a sensitivity of sin22θ13 <0.01. The experiment will use eight identical liquid scintillator detectors with 20-ton target mass installed at three underground sites to measure the flux and spectrum of reactor antineutrinos from the Daya Bay nuclear power plant and search for subdominant neutrino oscillation. Two of the eight antineutrino detectors have been completed and are installed in the Daya Bay near site. Data taking with these detectors will begin in summer 2011. We will describe the design, construction, and performance of the first two Daya Bay antineutrino detectors.
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17:30
(12' + 3')
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First data with the Daya Bay muon detectors⇓
slides
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Zhimin Wang (Institute of High Energy Physics)
The Daya Bay reactor neutrino experiment is designed to measure the last unknown neutrino mixing angle θ13 with a sensitivity of sin22θ13 less than 0.01 through a measurement of the relative rates and energy spectra of reactor neutrinos at different baselines. Three experimental halls will be installed with 8 identical antineutrino detectors(ADs). The first hall, Daya Bay near site, will come on line in this summer, which has 98m rock overburden ~360m away from reactors. 2 ADs will be installed in a water pool with at least 2.5m water shielding. The water pool is divided into inner/outer parts to serve as two layers' Cherenkov detector. RPC covers the water pool for multiple Muon tagging. We will describe the design, construct and performance of Daya Bay Muon detector.
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17:45
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The reactor antineutrino anomaly⇓
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Thierry Lasserre (CEA)
New reactor antineutrino spectra have been provided for 235U, 239Pu, 241Pu and 238U, increasing the mean flux by 3%. Our new synthesis of published experiments at reactor-detector distances 1.5 eV^2 (99%) and sin^2(2\\theta_{new})=0.14(0.1) (95%). Constraints on the theta13 neutrino mixing angle are revised.
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18:05
(12' + 3')
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Short-baseline neutrino oscillations with Borexino⇓
slides
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Aldo Ianni (INFN LNGS)
Recent experimental results suggest that the standard 3 flavor scenario with oscillations might be insufficient, and that new physics might be needed to explain the data.
Several possibilities are being investigated, including the existence of sterile neutrino components, of non standard interactions or even CPT violation.
The Borexino experiment might be an ideal place to test these ideas. By means of powerful neutrino and/or anti-neutrino sources, oscillations in the L/E~1 range can be probed precisely and neatly. We will show the sensitivity of such an experiment and the medium-term future perspectives.
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18:20
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Ga source experiment for detection of short baseline neutrino oscillations⇓
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Valery Gorbachev (INR RAS)
The status of the feasibility studies for the proposed Ga source experiment to search for possible electron neutrino transitions into sterile states is reported. The advantages of the proposed technique will be presented. The proposed experiment has the potential to detect neutrino oscillation transitions with mass-squared difference Δm2 > 0.5 eV2 with a sensitivity to disappearance of electron neutrinos of a few percent.
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Wednesday – Sep 7, 2011
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16:50 – 18:35 |
Neutrino Oscillations W3
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Parallel Session (Clubraum 1) – Chair:
André Rubbia
16:50
(15' + 5')
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T2K: New physics results⇓
slides
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Shoei Nakayama (Kamioka Observatory, ICRR, University of Tokyo)
The T2K experiment is designed to probe the θ13 neutrino mixing parameter by looking for the appearance of νe in a pure νμ beam and to precisely measure atmospheric Δm2 and θ23 parameters. A neutrino beam produced at J-PARC, Japan, is aimed at 2.5° off-axis angle to the SuperKamiokande far neutrino detector, 295 km away. The narrow energy neutrino beam peaked at about 600 MeV is optimized to maximize the probability of oscillation at the atmospheric Δm2 scale. The neutrino beam is monitored by a complex of neutrino near detectors at 280 m from the production target. T2K has successfully operated since January 2010. Data taking has been presently paused due to the recent earthquake in Japan. Results on measurements of νe appearance and νμ disappearance will be presented in this talk.
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17:10
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Latest neutrino oscillation results from MINOS⇓
slides
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Donna Naples (University of Pittsburgh)
MINOS, the Main Injection Neutrino Oscillation Search, is a two detector long baseline neutrino oscillation experiment. Since 2005 we have collected more than 12E20 protons on target(POTs), including 8E20POTs and 2.5E20POTs in dedicated neutrino and anti-neutrino running respectively. I will present the nu_mu_bar charged current disappearance analysis where we have the worlds best measurement on delta_m^2_bar, and the electron-neutrino appearance analysis where we have placed the worlds best limit on sin^2(2\theta_13).
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17:30
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Updated results of the OPERA long baseline neutrino experiment⇓
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Artem Chukanov (JINR, Dubna)
The OPERA neutrino detector is built in the Gran Sasso Laboratory 730 km away from CERN, along the CNGS neutrino beam. OPERA 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.
The experimental setup and ancillary facilities used to extract data recorded in the emulsion are described, with the special procedures used to locate the interactions vertices and detect short decay topologies. OPERA is taking data since 2008. A first nu-tau interaction candidate was already published in 2010. An improved analysis scheme associated with a more detailed simulation has been developed and new results with increased statistics will be presented.
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17:50
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Laguna: Future Megaton Detectors in Europe⇓
slides
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Thomas Patzak (University Paris Diderot)
The FP7 Design Study LAGUNA (Large Apparatus studying Grand Unification and Neutrino Astrophysics) supports studies of European research infrastructures in deep underground cavities able to host a very large multipurpose next-generation neutrino observatory dedicated to nucleon decay, neutrinos from supernovae, 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.
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18:05
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MicroBooNE: Searching for new physics in the neutrino sector with a 100-ton-scale liquid argon TPC⇓
slides
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Georgia Karagiorgi (Columbia University)
This talk introduces the MicroBooNE experiment, a 170 ton liquid argon TPC which is currently in construction in the Booster Neutrino Beamline (BNB) at Fermilab, and its physics goals. The talk focuses on MicroBooNE's sensitivity to interpretations of the low energy excess observed by the MiniBooNE experiment, which remains unexplained, as well as its sensitivity to light sterile neutrino oscillations, both as a single detector and in combination with a second, kiloton-scale liquid argon TPC in the Fermilab BNB.
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18:20
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Reviewing the status of neutrino NSI with quark parameters⇓
slides
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Francisco Javier Escrihuela (IFIC (CSIC/Valencia U.))
The search for new interactions of neutrinos beyond those of the standard model may help to elucidate the mechanism responsible for neutrino masses. In order to grant the relevance that it deserves, here we will see a review of neutrino NSI with quark parameters using the most recent solar, reactor, accelerator and atmospheric data.
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