Abstract:
CUORE is an upcoming cryogenic bolometer experiment, located at the underground Gran Sasso National Laboratory (LNGS) in Italy, whose primary purpose is to search for neutrinoless double beta decay in Te-130. A predecessor experiment, Cuoricino, ran from 2003-2008 at LNGS and served as a prototype for the CUORE detector, which will be ~ 20 times larger. In this talk I will explain the bolometric technique, review the Cuoricino results, and discuss the physics goals and status of CUORE, which is currently under construction.

The Enriched Xenon Observatory (EXO) is a series of experiments designed to search for the neutrinoless double beta decay (0nbb) of Xe-136. Observation of 0nbb would determine an absolute mass scale for neutrinos, prove that neutrinos are massive Majorana particles (indistinguishable from their own antiparticles), and constitute physics beyond the Standard Model. The current phase of the experiment, EXO-200, is operating and serves as a prototype for the 1-10 ton scale EXO experiment. I will report on the observation of the 2nbb decay mode in Xe-136 with T_1/2 = 2.11 +- 0.04 (stat.) +- 0.21 (sys.) x 10^21 yr. This second order process, predicted by the Standard Model, has been observed for several nuclei but not for Xe-136. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting 0nbb decay mode.

This summer, we installed mini-balloon and 136Xe loaded liquid scintillator in KamLAND detector. In this talk, we would like to talk about KamLAND-Zen project, installation scene of mini-balloon and current status of data acquisition.

The reactor neutrino experiment Double Chooz aims to search for the last unknown neutrino mixing angle \theta_{13} by using two identical liquid scintillator detectors. The Double Chooz far detector has constructed and physics data has been taken since the beginning of 2011. In this talk, the experimental concept and the current status of the Double Chooz experiment will be reviewed.

The Daya Bay reactor neutrino experiment is designed to determine the last unknown neutrino mixing angle $\theta$_{13} with a sensitivity of 0.01 or better in $\sin^{2}(2\theta_{13})$. The experiment is located in southern China, near the Daya Bay nuclear power plant. Eight identical liquid scintillator detectors are being installed in three experimental halls, to detect antineutrinos released in nuclear fission. Water Cherenkov detector and Resistive Plate Chambers deployed in each experimental hall form a muon system to veto cosmic muons which are the main source of backgrounds. Data taking in the first experimental hall at the Daya Bay near site started in this summer. We will review the design and construction of the experiment. The preliminary performance of the running detectors will also be shown.

The RENO (Reactor Experiment for Neutrino Oscillation) is at the stage of data taking to measure the smallest neutrino mixing angle theta_13 using anti-neutrinos emitted from the Yonggwang nuclear power plant in Korea. The basic feature of RENO is to search for reactor anti electron neutrino disappearance using two identical detectors, for comparison of neutrino fluxes at two different locations. We completed both two detectors in Feburary 2011 after 5 years of construction and started data-taking on August 1st of 2011. Detectors are located at 290m and 1.4km from the center of neuclear power plant, and expected to measure anti-neutrinos roughly 1280 and 115 per day in the near and far detector. We detect anti neutrino with IBD(Inverse Beta Decay) reaction, positron signal followed by neutron capture. Identical detectors greatly reduce the systematic uncertainty. The estimated systematic uncertainty associated with the measurement is less than 0.6%. Based on three years of data, the expected statistical error is about 0.3% and it would be sensitive to measure the neutrino mixing angle in the range of sin2(2theta_13) >!23$ 0.02. In this talk, we present description of detector construction, status of data-taking, and a preliminary result.

Borexino is a large, low-energy neutrino experiment that has been running since 2007 at the Gran Sasso Laboratory in Italy. Thanks to the extreme level of radiological purity of its liquid scintillator target, it has recently measured the flux of Be7 solar neutrinos with better than 5% precision thoroughly testing the current understanding of both neutrino oscillations and how the sun burns. Borexino has also very recently observed the much less abundant pep solar neutrinos and set the most stringent experimental limit on the neutrino flux from the CNO fusion cycle in the sun. The latter measurement was made possible by novel background suppression techniques whose performance has exceeded the original design performance of the detector. We will report on these results and give an outlook on the next steps of the Borexino scientific program.

The nuclear double beta decay can provide unique information on the nature of the neutrino. Evidence of the neutrinoless double beta decay would allow determining whether neutrinos are Majorana or Dirac particles. If observed, the measurement of the half-life of neutrinoless double beta decays in different nuclei can be used to infer the mass of the neutrino. NEMO-3, located in the Modane Underground Laboratory in the Frejus Tunnel under the French-Italian Alps, has completed data taking in January 2011 after eight year of successful operations. It employed a tracker and a plastic calorimeter to detect and reconstruct events with two electrons in the final state for seven isotopes. The use of tracking and calorimetric information allows efficient identification of signal and reject background events. SuperNEMO, the next generation experiment, will exploit the same technique to extend the sensitivity of the current search. The first module of SuperNEMO is currently under construction. We will present results from NEMO-3 and discuss the status of SuperNEMO and its physics reach.

The double beta decay experiment DCBA/MTD has been in progress at KEK. Kinetic energies of a pair of beta-rays are obtained from the tracks measured by drift chambers operated in a uniform magnetic field. A prototype detector DCBA-T2 has been operated and 21 candidates of two-neutrino double beta decay from Mo-100 of 0.036 mol were obtained. Development of a higher resolution prototype DCBA-T3 is in progress. Construction of the super conducting magnet is completed and a continuous run is started using the combination of T2 drift chambers and T3 magnet. Present status of DCBA and a future plan called MTD will be described in this presentation.

Abstract:
The GERDA experiment for the search of neutrinoless double beta-decay started first background runs in 2010 with three non-enriched detectors. Results on the background characterization of the experimental setup will be discussed.
Three HPGe detectors enriched in 76Ge are taking data since summer 2011. The current status of data taking including the enriched detectors will be discussed.

Abstract:
The next generation of 0vbb-decay experiments is required to have sensitivity to the effective neutrino Majorana mass of 10\,meV. This sensitivity is needed to allow for disentangling the inverted from the normal neutrino mass hierarchy. Some background contributions that are either irreducible and/or need further research are investigated and discussed. It is argued that further research and development into mitigation of background components is needed before a ton scale high purity germanium detector experiment with the needed sensitivity can be built.

The MAJORANA DEMONSTRATOR will perform a search for neutrinoless double-beta decay in 76Ge at the Sanford Underground Laboratory in South Dakota, USA. Using an array of 40kg of germanium detectors, up to 30kg of which will be enriched, the experiment will demonstrate the background levels necessary for a tonne-scale experiment. It is also projected to have the sensitivity to test the Klapdor-Kleingrothaus claim. This talk will discuss the low-background design of the experiment as well as its present status.

This presentation will describe our program to study neutron interactions in materials commonly used in double beta decay experiments. These interactions can result in background and by understanding the cross sections and production rates better, such background can be better dealt with. We have studied (n,n') and cosmogenic activation reactions at Los Alamos Neutron Scattering Center. The status of the various measurements will be presented.

As shown recently, the Fermi part $M_{F}^{0\nu}$ of the total $0\nu\beta\beta$-decay nuclear matrix element $M^{0\nu}$ can be related to the single Fermi transition matrix element between the isobaric analog state (IAS) of the ground state of the initial nucleus and the ground state of the final nucleus. The latter matrix element could be measured in charge-exchange reactions. Here we discuss a possibility of such a measurement for $^{48}$Ca and estimate the cross-section of the reaction $^{48}$Ti(n,p)$^{48}$Sc(IAS).

Abstract : The OPERA neutrino experiment in the underground Gran Sasso Laboratory has measured the velocity of neutrinos from the CERN CNGS beam over a baseline of about 730km with unprecedented accuracy. The measurement is based on the high-statistics data taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of the CNGS timing system and of the OPERA detector, as well as a high-precision geodesy campaign for the measurement of the neutrino baseline allowed reaching comparable systematic and statistical accuracies. An early arrival time of CNGS muon neutrinos with respect to the one computed assuming the speed of light in vacuum of (60.7+/-6.9(stat.)+/-7.4(sys.))ns was measured. This unexpected anomaly corresponds to a relative difference of the muon neutrino velocity with re-spect to the speed of light (v-c)/c=(2.48+/-0.28(stat.)+/-0.30(sys.))*10^{-5}.

1.KamLAND-Zen 10-C Tagging for Background Reduction/ Yohei Ono (Tohoku Univ.)
2.Development Light Collection Mirror for KamLAND2-Zen Experiment/ Akira Obata (Tohoku Univ.)
3.Development and Construction of the mini-Balloon for KamLAND-Zen/ Takahiro Nakada (Tohoku Univ.)
4.Mini-Balloon Installation and Monitoring System for KamLAND-Zen/ Hisataka Yoshida (Tohoku Univ.)
5.Detecting Neutrino Direction for KamLAND/ Hiromu Hanakago (Tohoku Univ.)
6.Development of Liquid Scintillator for KamLAND-Zen/ Ryo Kato (Tohoku Univ.)
7.Rehearsal of mini-Balloon Installation for KamLAND-Zen/ Azusa Gando (Tohoku Univ.)
8.Development of Muon Veto Trigger for KamLAND-Zen Experiment/ Ayumu Oki (Tohoku Univ.)
9.KamLAND-Zen Background Study with Photon Simulation/ Sayuri Matsuda (Tohoku Univ.)
10.Development of CANDLES DAQ System/ S.Maeda (University of Fukui)
11.Energy Calibration for CANDLES III/ Hidekazu Kakubata (Osaka Univ.)
12.CANDLES DAQ Trigger System/ Masayuki Saka (Osaka Univ.)
13.The Lifetime measurement of single beta decay of ⁴⁸Ca / Wang Wei (Osaka Univ.)
14.Improvement of the Energy Resolution by Cooling CaF₂(pure) and WLS for CANDLES / Kazuya Takubo (Osaka Univ.)
15.Single &alpha Events Analysis by Pulse Shape Discrimination with CANDLES III(U.G.) / Go Ito (Osaka Univ.)
16.Position Reconstruction for CANDLES III(U.G.) / Keisuke Yasuda (Osaka Univ.)

SNO+ is a successor experiment to the Sudbury Neutrino Observatory (SNO), making use of liquid scintillator as the detection medium rather than heavy water. The resulting emission of 50-100 times more light from neutrino interactions allows neutrino detection to lower energies than in SNO. In particular, a search for neutrinoless double beta decay in neodymium-150 is a prime goal of the experiment. In addition, measurements of the low energy solar neutrino spectrum are planned, as well as measurements of antineutrinos from radioactivity in the earth and from nuclear reactors. SNO+ also makes an excellent supernova neutrino detector.
The status of activities associated with achieving these goals will be presented.

NEXT (Neutrino Telescope with a Xenon TPC) is a new dbd experiment based on a high pressure gas Xenon chamber(HPGXe). The experiment will use 100 kg of Xe, enriched at 90% in the Xe-136 isotope. The chamber will use electroluminescence to amplify the charge signal. Large area, UV-sensitive, low-background PMTs will be used for energy measurement and SiPM (MPPCs) as pixels for tracking. The strong points of NEXT are: an excellent energy resolution, better than 1% FWHM at Qbb and the ability to record the track of the two electrons, giving a topological signal.
The experiment has essentially completed the R&D and moving to construction phase. It is foreseen to start data takin in 2013, at the Canfranc Underground Laboratory, in Spain. In this talk I will present the state-of-the art of the detector including the initial results, very promising, from the large prototypes already constructed and operating at LBNL, IFIC and U. of Zaragoza.

The search for neutrinoless double beta decay is regarded to be the 'gold plated channel' to clarify the neutrino's nature as either Dirac- or Majorana particle. Furthermore it is a direct measure of the effective neutrino mass. Therefore it became a field of great interest during recent years. At the moment first experiments are commissioned that will be able to probe half-lives above 1025 years for this decay. If they succeed it is crucial to verify the results with different experimental techniques and for several isotopes. Otherwise new approaches are necessary.
COBRA offers the potential to fulfil both challenging tasks. By applying CdZnTe room-temperature semiconductor detectors several promising options are feasible. CdZnTe as semiconductor material provides the essential requirements of intrinsic radiopurity and good energy resolution. Furthermore, because it can be operated at room temperature, its operation is comparatively uncomplicated and offers options like operating the detectors in liquid scintillator.
CdZnTe detectors are available with two readout techniques. The coplanar-grid (CPG) readout offers besides the energy information limited spatial resolution. A low-background test set-up of CPG detectors is operated at the Italian underground laboratory LNGS. Recently major upgrades have been performed to the set-up. First results of these improvements will be shown. The second option is the readout as pixelated detectors. Here large pixels (~ 1mm) as well as small pixels (~ 100$\mu$m) are feasible and under investigation. Tests at LNGS with large pixel set-ups showed their huge potential for background suppression. Small pixel detectors even offer the possibility of tracking and particle identification. Currently intensive research and development for these detector types is done.
The talk will give an overview on the various possibilities COBRA offers and show recent achievements of the collaboration.

The PandaX (Particle AND Astroparticle Xenon observatory) experiment is a dual phase ton-scale liquid Xenon detector to search for the WIMP dark matter candidate. It can be utilized to look for Xe136 double beta decay signals. Most background comes from radioactive isotopes in the PMTs. R&D research work is on going, focusing on radio-pure photon detectors (like SiPM). Some results will be presented in this talk.

Abstract: 116Cd is one of the attractive candidates as a target material to look for neutrino-less double beta decay because of its rather high Q-value of 2.805 MeV. In the past experiments, CdWO4 crystals were used as a target material and a scintillator to detect the signal. In neutrino-less double beta decay experiments, radioactive impurities of the detector is one of the crucial background. Therefore the combination of a target material and KamLAND, an ultra-low radioactive background detector, is expected to provide a good sensitivity. We deployed a natural CdWO4 crystal with weight of 391 g in the KamLAND detector and measured its scintillation light with a calibration radioactive source. In this deployment, we studied how to identify the CdWO4 scintillation light from the light from the surrounding liquid scintillator. Those results will be reported.

Lucifer will be a scintillating bolometers tower based on Zn-(82)Se crystals aiming to 10^-3 counts/Kg/Kev/year background rate. We could describe the status of project in terms of Se enrichment and purification, ZnSe crystal production, developments in light detectors, test results and physics reach.

We investigate lepton number violating decays of charged mesons, induced by the existence of Majorana neutrinos. These processes provide information complementary to neutrinoless double nuclear beta decays, and are sensitive to neutrino masses and lepton mixing. We explore neutrino mass ranges m_N from below 1 eV to several hundred GeV.

Neutrino properties and especially the determination of their absolute mass play an important role at the intersections of cosmology, particle physics and astroparticle physics.
At present there are two complementary approaches to address this topic in laboratory experiments. The search for neutrinoless double beta decay probes whether neutrinos are Majorana particles and determines an effective neutrino mass value. Experiments such as MARE, KATRIN and the recently proposed Project 8 investigate beta decay electrons close to their kinematic endpoint in order to determine the neutrino rest mass by a model-independent method.
The KArlsruhe TRItium Neutrino experiment (KATRIN) is currently the experiment in the most advanced status of commissioning. Applying an ultra-luminous molecular windowless gaseous tritium source and an integrating high-resolution spectrometer of MAC-E filter type, it allows beta spectroscopy close to the tritium endpoint with unprecedented precision and will reach a sensitivity of 200 meV/c^2 (90% C.L.) on the neutrino rest mass.
This talk gives an overview of the present laboratory experiments and reports about the commissioning status of KATRIN.

The recently completed IceCube Neutrino Telescope instruments a volume of roughly one gigaton of Antarctic ice with 5160 Digital Optical Modules. With its unprecedented size we aim to discover astrophysical neutrino sources and examine neutrino properties. The talk will provide an overview of on-going analyses and recent results achieved with data acquired during the six year construction period. Among those are the search for neutrino point sources, transient events, dark matter, and atmospheric neutrino measurements. A particular emphasis will be put on the status of measuring neutrino properties. Among others prospects for measuring oscillation effects and mass hierarchy will be discussed in the context of the current array and potential upgrades of it.

ANTARES is the largest neutrino telescope in the Northern hemisphere. Located in the Mediterranean Sea, 40 km off-shore Toulon at a depth of about 2500 metres, it is composed of a lattice of 885 photomultiplier tubes mounted on 12 strings. Muon neutrinos with an energy larger than 100 GeV are detected through the Cherenkov light emitted by up-going muons produced by neutrino interactions in or in the vicinity of the detector. The detector is continuously taking data since May 2008. The ANTARES infrastructure represents also an important facility for long term observations for Earth and marine sciences.
The scientific goal is the search for cosmic neutrinos coming from galactic and extragalactic sources. The most recent results obtained in different fields will be discussed.

I review how the cosmic microwave background anisotropies and the distribution of large-scale structure can be used to constrain or even determine neutrino properties such as the absolute neutrino mass scale. I discuss the recent hint from precision cosmology for excess relativistic energy density, and the possibility that this might be explained by a light eV-mass sterile neutrino.