Author: "Berger, B. E." - Searchworks@Jio Institute Digital Library Search Results

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520 results on '"Berger, B. E."'

1. Limits on the Low-Energy Electron Antineutrino Flux from the Brightest GRB of All Time

Author: Araki, T., Chauhan, S., Chiba, K., Eda, T., Eizuka, M., Funahashi, Y., Furuto, A., Gando, A., Gando, Y., Goto, S., Hachiya, T., Hata, K., Ichimura, K., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Marthe, A., Matsumoto, Y., Mitsui, T., Miyake, H., Morita, D., Nakajima, R., Nakamura, K., Nakamura, R., Nakane, J., Ono, T., Ozaki, H., Saito, K., Sakai, T., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Tachibana, K., Tamae, K., Watanabe, H., Watanabe, K., Kurosawa, S., Urano, Y., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Fu, Z., Ghosh, S., Smolsky, J., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Delloro, S., Odonnell, T., Detwiler, J. A., Enomoto, S., Decowski, M. P., Weerman, K. M., Grant, C., Penek, Ö., Song, H., Li, A., Axani, S. N., Garcia, M., and Sarfraz, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The electron antinuetrino flux limits are presented for the brightest gamma-ray burst (GRB) of all time, GRB221009A, over a range of 1.8-200 MeV using the Kamioka Liquid Scintillator Anti Neutrino Detector (KamLAND). Using a variety of time windows to search for electron antineutrinos coincident with the GRB, we set an upper limit on the flux under the assumption of various neutrino source spectra. No excess was observed in any time windows ranging from seconds to days around the event trigger time. The limits are compared to the results presented by IceCube., Comment: 8 pages, 3 figures, 1 table
Published: 2024

2. Search for Majorana Neutrinos with the Complete KamLAND-Zen Dataset

Author: Abe, S., Araki, T., Chiba, K., Eda, T., Eizuka, M., Funahashi, Y., Furuto, A., Gando, A., Gando, Y., Goto, S., Hachiya, T., Hata, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Marthe, A., Matsumoto, Y., Mitsui, T., Miyake, H., Morita, D., Nakajima, R., Nakamura, K., Nakamura, R., Nakane, J., Ono, T., Ozaki, H., Saito, K., Sakai, T., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Tachibana, K., Tamae, K., Watanabe, H., Watanabe, K., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Fu, Z., Ghosh, S., Smolsky, J., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Dell'Oro, S., O'Donnell, T., Detwiler, J. A., Enomoto, S., Decowski, M. P., Weerman, K. M., Grant, C., Penek, O., Song, H., Li, A., Axani, S. N., Garcia, M., and Sarfraz, M.
Subjects: High Energy Physics - Experiment
Abstract: We present a search for neutrinoless double-beta ($0\nu\beta\beta$) decay of $^{136}$Xe using the full KamLAND-Zen 800 dataset with 745 kg of enriched xenon, corresponding to an exposure of $2.097$ ton yr of $^{136}$Xe. This updated search benefits from a more than twofold increase in exposure, recovery of photo-sensor gain, and reduced background from muon-induced spallation of xenon. Combining with the search in the previous KamLAND-Zen phase, we obtain a lower limit for the $0\nu\beta\beta$ decay half-life of $T_{1/2}^{0\nu} > 3.8 \times 10^{26}$ yr at 90% C.L., a factor of 1.7 improvement over the previous limit. The corresponding upper limits on the effective Majorana neutrino mass are in the range 28-122 meV using phenomenological nuclear matrix element calculations., Comment: arXiv admin note: text overlap with arXiv:2203.02139
Published: 2024

3. Search for Charged Excited States of Dark Matter with KamLAND-Zen

Author: collaboration, KamLAND-Zen, Abe, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., Goto, S., Hachiya, T., Hata, K., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Kurasawa, M., Mitsui, T., Miyake, H., Morita, D., Nakahata, T., Nakajima, R., Nakamura, K., Nakamura, R., Nakane, J., Ozaki, H., Sakai, T., Shimizu, I., Shirai, J., Shiraishi, K., Shoji, R., Suzuki, A., Takeuchi, A., Tamae, K., Watanabe, H., Watanabe, K., Obara, S., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Ichikawa, A. K., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Fu, Z., Smolsky, J., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Dell'Oro, S., O'Donnell, T., Detwiler, J. A., Enomoto, S., Decowski, M. P., Weerman, K. M., Grant, C., Li, A., and Song, H.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: Particle dark matter could belong to a multiplet that includes an electrically charged state. WIMP dark matter ($\chi^{0}$) accompanied by a negatively charged excited state ($\chi^{-}$) with a small mass difference (e.g. $<$ 20 MeV) can form a bound-state with a nucleus such as xenon. This bound-state formation is rare and the released energy is $\mathcal{O}(1-10$) MeV depending on the nucleus, making large liquid scintillator detectors suitable for detection. We searched for bound-state formation events with xenon in two experimental phases of the KamLAND-Zen experiment, a xenon-doped liquid scintillator detector. No statistically significant events were observed. For a benchmark parameter set of WIMP mass $m_{\chi^{0}} = 1$ TeV and mass difference $\Delta m = 17$ MeV, we set the most stringent upper limits on the recombination cross section times velocity $\langle\sigma v\rangle$ and the decay-width of $\chi^{-}$ to $9.2 \times 10^{-30}$ ${\rm cm^3/s}$ and $8.7 \times 10^{-14}$ GeV, respectively at 90% confidence level.
Published: 2023
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4. Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND

Author: Collaboration, KamLAND-Zen, Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Kurasawa, M., Mitsui, T., Miyake, H., Nakahata, T., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A. K., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Fu, Z., Smolsky, J., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Dell'Oro, S., O'Donnell, T., Detwiler, J. A., Enomoto, S., Decowski, M. P., Weerman, K., Grant, C., Li, A., and Song, H.
Subjects: High Energy Physics - Experiment, Nuclear Experiment, Physics - Instrumentation and Detectors
Abstract: Cosmic-ray muons produce various radioisotopes when passing through material. These spallation products can be backgrounds for rare event searches such as in solar neutrino, double-beta decay, and dark matter search experiments. The KamLAND-Zen experiment searches for neutrinoless double-beta decay in 745kg of xenon dissolved in liquid scintillator. The experiment includes dead-time-free electronics with a high efficiency for detecting muon-induced neutrons. The production yields of different radioisotopes are measured with a combination of delayed coincidence techniques, newly developed muon reconstruction and xenon spallation identification methods. The observed xenon spallation products are consistent with results from the FLUKA and Geant4 simulation codes.
Published: 2023

5. First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND

Author: KamLAND Collaboration, Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Kurasawa, M., Mitsui, T., Miyake, H., Nakahata, T., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A. K., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Fu, Z., Smolsky, J., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., Li, A., Song, H., Dell'Oro, S., and O'Donnell, T.
Subjects: High Energy Physics - Experiment
Abstract: We report a measurement of the strange axial coupling constant $g_A^s$ using atmospheric neutrino data at KamLAND. This constant is a component of the axial form factor of the neutral-current quasielastic (NCQE) interaction. The value of $g_A^s$ significantly changes the ratio of proton and neutron NCQE cross sections. KamLAND is suitable for measuring NCQE interactions as it can detect nucleon recoils with low-energy thresholds and measure neutron multiplicity with high efficiency. KamLAND data, including the information on neutron multiplicity associated with the NCQE interactions, makes it possible to measure $g_A^s$ with a suppressed dependence on the axial mass $M_A$, which has not yet been determined. For a comprehensive prediction of the neutron emission associated with neutrino interactions, we establish a simulation of particle emission via nuclear deexcitation of $^{12}$C, a process not considered in existing neutrino Monte Carlo event generators. Energy spectrum fitting for each neutron multiplicity gives $g_A^s =-0.14^{+0.25}_{-0.26}$, which is the most stringent limit obtained using NCQE interactions without $M_A$ constraints. The two-body current contribution considered in this analysis relies on a theoretically effective model and electron scattering experiments and requires future verification by direct measurements and future model improvement.
Published: 2022
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6. Abundances of uranium and thorium elements in Earth estimated by geoneutrino spectroscopy

Author: Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Kurasawa, M., Maemura, N., Mitsui, T., Miyake, H., Nakahata, T., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirahata, Y., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A. K., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Fu, Z., Smolsky, J., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Li, A., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., Song, H., O'Donnell, T., and Dell'Oro, S.
Subjects: Physics - Geophysics, High Energy Physics - Experiment
Abstract: The decay of the primordial isotopes $^{238}\mathrm{U}$, $^{235}\mathrm{U}$, $^{232}\mathrm{Th}$, and $^{40}\mathrm{K}$ have contributed to the terrestrial heat budget throughout the Earth's history. Hence the individual abundance of those isotopes are key parameters in reconstructing contemporary Earth model. The geoneutrinos produced by the radioactive decays of uranium and thorium have been observed with the Kamioka Liquid-Scintillator Antineutrino Detector (KamLAND). Those measurements have been improved with more than 18-year observation time, and improvements in detector background levels mainly by an 8-year almost rector-free period now permit spectroscopy with geoneutrinos. Our results yield the first constraint on both uranium and thorium heat contributions. Herein the KamLAND result is consistent with geochemical estimations based on elemental abundances of chondritic meteorites and mantle peridotites. The High-Q model is disfavored at 99.76% C.L. and a fully radiogenic model is excluded at 5.2$\sigma$ assuming a homogeneous heat producing element distribution in the mantle., Comment: 13 pages, 2 figures, accepted for publication in Geophysical Research Letters on Aug 4th, 2022
Published: 2022
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7. Search for supernova neutrinos and constraint on the galactic star formation rate with the KamLAND data

Author: Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Kurasawa, M., Maemura, N., Mitsui, T., Miyake, H., Nakahata, T., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Winslow, L. A., Fu, Z., Smolsky, J., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Li, A., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., Song, H., O'Donnell, T., and Dell'Oro, S.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract: We present the results of a search for core-collapse supernova neutrinos, using long-term KamLAND data from 2002 March 9 to 2020 April 25. We focus on the electron antineutrinos emitted from supernovae in the energy range of 1.8--111 MeV. Supernovae will make a neutrino event cluster with the duration of $\sim$10 s in the KamLAND data. We find no neutrino clusters and give the upper limit on the supernova rate as to be 0.15 yr$^{-1}$ with a 90% confidence level. The detectable range, which corresponds to a >95% detection probability, is 40--59 kpc and 65--81 kpc for core-collapse supernovae and failed core-collapse supernovae, respectively. This paper proposes to convert the supernova rate obtained by the neutrino observation to the Galactic star formation rate. Assuming a modified Salpeter-type initial mass function, the upper limit on the Galactic star formation rate is <(17.5--22.7) $M_{\odot} \mathrm{yr}^{-1}$ with a 90% confidence level., Comment: 10 pages, 4 figures, accepted for publication in Astrophysical Journal
Published: 2022
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8. Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen

Author: Collaboration, KamLAND-Zen, Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hayashida, S., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Koga, M., Kurasawa, M., Maemura, N., Mitsui, T., Miyake, H., Nakahata, T., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Ueshima, K., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A. K., Chernyak, D., Kozlov, A., Nakamura, K. Z., Yoshida, S., Takemoto, Y., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Smolsky, J., Fu, Z., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Dell'Oro, S., O'Donnell, T., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., Li, A., and Song, H.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta ($0\nu\beta\beta$) decay half-life in $^{136}$Xe using a xenon-loaded liquid scintillator. We report an improved search using an upgraded detector with almost double the amount of xenon and an ultralow radioactivity container, corresponding to an exposure of 970 kg yr of $^{136}$Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation of xenon, and have required the use of novel background rejection techniques. We obtain a lower limit for the $0\nu\beta\beta$ decay half-life of $T_{1/2}^{0\nu} > 2.3 \times 10^{26}$ yr at 90% C.L., corresponding to upper limits on the effective Majorana neutrino mass of 36-156 meV using commonly adopted nuclear matrix element calculations., Comment: 7 pages, 3 figures
Published: 2022
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9. KamLAND's search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube

Author: Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Kinoshita, T., Koga, M., Kurasawa, M., Maemura, N., Mitsui, T., Miyake, H., Nakahata, T., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A. K., Yoshida, S., Umehara, S., Fushimi, K., Kotera, K., Urano, Y., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Smolsky, J., Lertprasertpong, J., Winslow, L. A., Fu, Z., Ouellet, J., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Li, A., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., Song, H., O'Donnell, T., and Dell'Oro, S.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We report the results of a search for MeV-scale astrophysical neutrinos in KamLAND presented as an excess in the number of coincident neutrino interactions associated with the publicly available high-energy neutrino datasets from the IceCube Neutrino Observatory. We find no statistically significant excess in the number of observed low-energy electron antineutrinos in KamLAND, given a coincidence time window of $\pm$500s, $\pm$1,000s, $\pm$3,600s, and $\pm$10,000s around each of the IceCube neutrinos. We use this observation to present limits from 1.8 MeV to 100 MeV on the electron antineutrino fluence, assuming a mono-energetic flux. We then compare the results to several astrophysical measurements performed by IceCube and place a limit at the 90% confidence level on the electron antineutrino isotropic thermal luminosity from the TXS 0506+056 blazar., Comment: 12 pages, 5 figures
Published: 2022
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10. A search for correlated low-energy electron antineutrinos in KamLAND with gamma-ray bursts

Author: Abe, S., Asami, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Kinoshita, T., Koga, M., Maemura, N., Mitsui, T., Miyake, H., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Eizuka, M., Kurasawa, M., Nakahata, T., Futagi, S., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A. K., Yoshida, S., Umehara, S., Fushimi, K., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Smolsky, J., Laber-Smith, C., Winslow, L. A., Fu, Z., Ouellet, J., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Li, A., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., Song, H., O'Donnell, T., and Dell'Oro, S.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract: We present the results of a time-coincident event search for low-energy electron antineutrinos in the KamLAND detector with gamma-ray bursts from the Gamma-ray Coordinates Network and Fermi Gamma-ray Burst Monitor. Using a variable coincidence time window of $\pm$500s plus the duration of each gamma-ray burst, no statistically significant excess above background is observed. We place the world's most stringent 90% confidence level upper limit on the electron antineutrino fluence below 17.5 MeV. Assuming a Fermi-Dirac neutrino energy spectrum from the gamma-ray burst source, we use the available redshift data to constrain the electron antineutrino luminosity and effective temperature., Comment: 9 pages, 3 figures
Published: 2021
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11. Limits on astrophysical antineutrinos with the KamLAND experiment

Author: Abe, S., Asami, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hayashida, S., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kinoshita, T., Kishimoto, Y., Koga, M., Maemura, N., Mitsui, T., Miyake, H., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Ueshima, K., Wada, Y., Watanabe, H., Yoshida, Y., Obara, S., Ichikawa, A. K., Kozlov, A., Chernyak, D., Takemoto, Y., Yoshida, S., Umehara, S., Fushimi, K., Hirata, S., Nakamura, K. Z., Yoshida, M., Berger, B. E., Fujikawa, B. L., Learned, J. G., Maricic, J., Axani, S. N., Fu, Z., Ouellet, J., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Li, A., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., Dell'Oro, S., and O'donnell, T.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract: We report on a search for electron antineutrinos ($\bar{\nu}_e$) from astrophysical sources in the neutrino energy range 8.3 to 30.8 MeV with the KamLAND detector. In an exposure of 6.72 kton-year of the liquid scintillator, we observe 18 candidate events via the inverse beta decay reaction. Although there is a large background uncertainty from neutral current atmospheric neutrino interactions, we find no significant excess over background model predictions. Assuming several supernova relic neutrino spectra, we give upper flux limits of 60--110 cm$^{-2}$ s$^{-1}$ (90% CL) in the analysis range and present a model-independent flux. We also set limits on the annihilation rates for light dark matter pairs to neutrino pairs. These data improves on the upper probability limit of $^{8}$B solar neutrinos converting into $\bar{\nu}_e$'s, $P_{\nu_e \rightarrow \bar{\nu}_e} < 3.5\times10^{-5}$ (90% CL) assuming an undistorted $\bar{\nu}_e$ shape. This corresponds to a solar $\bar{\nu}_e$ flux of 60 cm$^{-2}$ s$^{-1}$ (90% CL) in the analysis energy range., Comment: 21 pages, 9 figures, 4 tables, accepted for publication in Astrophysical Journal
Published: 2021
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12. Search for Solar Flare Neutrinos with the KamLAND detector

Author: Abe, S., Asami, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hayashida, S., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Kinoshita, T., Koga, M., Maemura, N., Mitsui, T., Miyake, H., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Ueshima, K., Wada, Y., Watanabe, H., Yoshida, Y., Obara, S., Kozlov, A., Chernyak, D., Takemoto, Y., Yoshida, S., Umehara, S., Fushimi, K., Ichikawa, A. K., Nakamura, K. Z., Yoshida, M., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S. N., Winslow, L. A., Fu, Z., Ouellet, J., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Li, A., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., O'Donnell, T., and Dell'Oro, S.
Subjects: Astrophysics - Solar and Stellar Astrophysics
Abstract: We report the result of a search for neutrinos in coincidence with solar flares from the GOES flare database. The search was performed on a 10.8 kton-year exposure of KamLAND collected from 2002 to 2019. This large exposure allows us to explore previously unconstrained parameter space for solar flare neutrinos. We found no statistical excess of neutrinos and established 90% confidence level upper limits of $8.4 \times 10^7$ cm$^{-2}$ ($3.0 \times 10^{9}$ cm$^{-2}$) on electron anti-neutrino (electron neutrino) fluence at 20 MeV normalized to the X12 flare, assuming that the neutrino fluence is proportional to the X-ray intensity., Comment: 13 pages, 9 figures, accepted October 27, 2021
Published: 2021
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13. The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment

Author: collaboration, KamLAND-Zen, Gando, Y., Gando, A., Hachiya, T., Hayashida, S., Hosokawa, K., Ikeda, H., Mitsui, T., Nakada, T., Obara, S., Ozaki, H., Shirai, J., Ueshima, K., Watanabe, H., Abe, S., Hata, K., Hayashi, A., Honda, Y., Ieki, S., Inoue, K., Ishidoshiro, K., Ishikawa, S., Kamei, Y., Kamizawa, K., Karino, Y., Kawada, N., Kinoshita, T., Koga, M., Matsuda, S., Miyake, H., Nakamura, K., Nemoto, K., Ono, A., Ota, N., Otsuka, S., Shibukawa, Y., Shimizu, I., Shirahata, Y., Soma, K., Suzuki, A., Suzuki, A. A., Takai, T., Takeuchi, A., Tamae, K., Teraoka, Y., Wada, Y., Chernyak, D., Kozlov, A., Yoshida, S., Umehara, S., Takemoto, Y., Fushimi, K., Hirata, S., Grant, C., Li, A., Learned, J. G., Maricic, J., Berger, B. E., Fujikawa, B. K., Fraker, S., Herman, A., Krupczak, E., Pease, G. L., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., O'Donnell, T., Dell'Oro, S., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract: The KamLAND-Zen 800 experiment is searching for the neutrinoless double-beta decay of $^{136}$Xe by using $^{136}$Xe-loaded liquid scintillator. The liquid scintillator is enclosed inside a balloon made of thin, transparent, low-radioactivity film that we call Inner Balloon (IB). The IB, apart from guaranteeing the liquid containment, also allows to minimize the background from cosmogenic muon-spallation products and $^{8}$B solar neutrinos. Indeed these events could contribute to the total counts in the region of interest around the Q-value of the double-beta decay of $^{136}$Xe. In this paper, we present an overview of the IB and describe the various steps of its commissioning minimizing the radioactive contaminations, from the material selection, to the fabrication of the balloon and its installation inside the KamLAND detector. Finally, we show the impact of the IB on the KamLAND background as measured by the KamLAND detector itself., Comment: 23 pages, 16 figures, to be submitted to JINST
Published: 2021
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14. A Search for Charged Excitation of Dark Matter with the KamLAND-Zen Detector

Author: Abe, S., Asami, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hayashida, S., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kinoshita, T., Koga, M., Maemura, N., Mitsui, T., Miyake, H., Nakamura, K., Nakamura, R., Ono, A., Ota, N., Otsuka, S., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirahata, Y., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Ueshima, K., Wada, Y., Watanabe, H., Yoshida, Y., Obara, S., Chernyak, D., Kozlov, A., Yoshida, S., Umehara, S., Takemoto, Y., Fushimi, K., Hirata, S., Ichikawa, A., Nakamura, K. Z., Yoshida, M., Berger, B. E., Fujikawa, B. K., Grant, C., Li, A., Learned, J. G., Maricic, J., Axani, S., Winslow, L. A., Fu, Z., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., ODonnell, T., DellOro, S., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Subjects: High Energy Physics - Experiment
Abstract: There are many theories where a dark matter particle is part of a multiplet with an electrically charged state. If WIMP dark matter ($\chi^{0}$) is accompanied by a charged excited state ($\chi^{-}$) separated by a small mass difference, it can form a stable bound state with a nucleus. In supersymmetric models, the $\chi^{0}$ and the $\chi^{-}$ could be the neutralino and a charged slepton, such as the neutralino-stau degenerate model. The formation binding process is expected to result in an energy deposition of {\it O}(1--10 MeV), making it suitable for detection in large liquid scintillator detectors. We describe new constraints on the bound state formation with a xenon nucleus using the KamLAND-Zen 400 Phase-II dataset. In order to enlarge the searchable parameter space, all xenon isotopes in the detector were used. For a benchmark parameter set of $m_{\chi^{0}} = 100$ GeV and $\Delta m = 10$ MeV, this study sets the most stringent upper limits on the recombination cross section $\langle\sigma v\rangle$ and the decay-width of $\chi^{-}$ of $2.0 \times 10^{-31}$ ${\rm cm^3/s}$ and $1.1 \times 10^{-18}$ GeV, respectively (90\% confidence level).
Published: 2021

15. Search for Low-energy Electron Antineutrinos in KamLAND Associated with Gravitational Wave Events

Author: Abe, S., Asami, S., Gando, A., Gando, Y., Gima, T., Goto, A., Hachiya, T., Hata, K., Hayashida, S., Hosokawa, K., Ichimura, K., Ieki, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Kamei, Y., Kawada, N., Kishimoto, Y., Kinoshita, T., Koga, M., Maemura, N., Mitsui, T., Miyake, H., Nakamura, K., Nakamura, R., Ozaki, H., Sakai, T., Sambonsugi, H., Shimizu, I., Shirai, J., Shiraishi, K., Suzuki, A., Suzuki, Y., Takeuchi, A., Tamae, K., Ueshima, K., Wada, Y., Watanabe, H., Yoshida, Y., Obara, S., Kozlov, A., Chernyak, D., Takemoto, Y., Yoshida, S., Umehara, S., Fushimi, K., Ichikawa, A. K., Nakamura, K. Z., Yoshida, M., Berger, B. E., Fujikawa, B. K., Learned, J. G., Maricic, J., Axani, S., Winslow, L. A., Fu, Z., Ouellet, J., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Li, A., Detwiler, J. A., Enomoto, S., Decowski, M. P., Grant, C., O'Donnell, T., and Dell'Oro, S.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract: We present the results of a search for MeV-scale electron antineutrino events in KamLAND in coincident with the 60 gravitational wave events/candidates reported by the LIGO/Virgo collaboration during their second and third observing runs. We find no significant coincident signals within a $\pm$ 500 s timing window from each gravitational wave and present 90% C.L. upper limits on the electron antineutrino fluence between $10^{8}$-$10^{13}\,{\mathrm cm^2}$ for neutrino energies in the energy range of 1.8-111 MeV., Comment: 11 pages, 2 figures, 2 tables, Accepted for publication in ApJ
Published: 2020
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16. Search for electron antineutrinos associated with gravitational wave events GW150914 and GW151226 using KamLAND

Author: KamLAND Collaboration, Gando, A., Gando, Y., Hachiya, T., Hayashi, A., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Karino, Y., Koga, M., Matsuda, S., Mitsui, T., Nakamura, K., Obara, S., Oura, T., Ozaki, H., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Takai, T., Tamae, K., Teraoka, Y., Ueshima, K., Watanabe, H., Kozolov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Piepke, A., Banks, T. I., Berger, B. E., Fujikawa, B. K., O'Donnell, T., Learned, J. G., Maricic, J., Sakai, M., Winslow, L. A., Krupczak, E., Ouellet, J., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, Nuclear Experiment
Abstract: We present a search for low energy antineutrino events coincident with the gravitational wave events GW150914 and GW151226, and the candidate event LVT151012 using KamLAND, a kiloton-scale antineutrino detector. We find no inverse beta-decay neutrino events within $\pm 500$ seconds of either gravitational wave signal. This non-detection is used to constrain the electron antineutrino fluence and the luminosity of the astrophysical sources., Comment: 11 pages, 4 figures, as published in ApJL. Updated to replace power law spectrum with Fermi Dirac spectrum
Published: 2016
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17. Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment

Author: Collaboration, KamLAND-Zen, Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Otani, M., Oura, T., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Tachibana, H., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Banks, T. I., Berger, B. E., Fujikawa, B. K., O'Donnell, T., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: A search for double-beta decays of 136Xe to excited states of 136Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The 0+1, 2+1 and 2+2 transitions of 0{\nu}\{beta}\{beta} decay were evaluated in an exposure of 89.5kg-yr of 136Xe, while the same transitions of 2{\nu}\{beta}\{beta} decay were evaluated in an exposure of 61.8kg-yr. No excess over background was found for all decay modes. The lower half-life limits of the 2+1 state transitions of 0{\nu}\{beta}\{beta} and 2{\nu}\{beta}\{beta} decay were improved to T(0{\nu}, 0+ \rightarrow 2+) > 2.6\times10^25 yr and T(2{\nu}, 0+ \rightarrow 2+) > 4.6\times10^23 yr (90% C.L.), respectively. We report on the first experimental lower half-life limits for the transitions to the 0+1 state of 136Xe for 0{\nu}\{beta}\{beta} and 2{\nu}\{beta}\{beta} decay. They are T (0{\nu}, 0+ \rightarrow 0+) > 2.4\times10^25 yr and T(2{\nu}, 0+ \rightarrow 0+) > 8.3\times10^23 yr (90% C.L.). The transitions to the 2+2 states are also evaluated for the first time to be T(0{\nu}, 0+ \rightarrow 2+) > 2.6\times10^25 yr and T(2{\nu}, 0+ \rightarrow 2+) > 9.0\times10^23 yr (90% C.L.). These results are compared to recent theoretical predictions., Comment: 16 pages, 4 figures. Published in Nuclear Physics A
Published: 2015
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18. KamLAND Sensitivity to Neutrinos from Pre-Supernova Stars

Author: Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Oura, T., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Tachibana, H., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Kozlov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Piepke, A., Banks, T. I., Berger, B. E., Fujikawa, B. K., O'Donnell, T., Learned, J. G., Maricic, J., Matsuno, S., Sakai, M., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: In the late stages of nuclear burning for massive stars ($M>8~M_{\sun}$), the production of neutrino-antineutrino pairs through various processes becomes the dominant stellar cooling mechanism. As the star evolves, the energy of these neutrinos increases and in the days preceding the supernova a significant fraction of emitted electron anti-neutrinos exceeds the energy threshold for inverse beta decay on free hydrogen. This is the golden channel for liquid scintillator detectors because the coincidence signature allows for significant reductions in background signals. We find that the kiloton-scale liquid scintillator detector KamLAND can detect these pre-supernova neutrinos from a star with a mass of $25~M_{\sun}$ at a distance less than 690~pc with 3$\sigma$ significance before the supernova. This limit is dependent on the neutrino mass ordering and background levels. KamLAND takes data continuously and can provide a supernova alert to the community., Comment: 19 pages, 6 figures, 1 table
Published: 2015
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19. Measurement of the Electron Neutrino Charged-current Interaction Rate on Water with the T2K ND280 pi-zero Detector

Author: T2K Collaboration, Abe, K., Adam, J., Aihara, H., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bartet-Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Feusels, T., Finch, A. J., Fiorentini, G. A., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Garcia, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haegel, L., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayashino, T., Hayato, Y., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Hosomi, F., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, S., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Koga, T., Kolaceke, A., Konaka, A., Kopylov, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, J. P., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K. G., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Ovsyannikova, T., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Rychter, A., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J. D., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaikhiev, A., Shaker, F., Shaw, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Wakamatsu, K., Walter, C. W., Wark, D., Warzycha, W., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoo, J., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Żmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: This paper presents a measurement of the charged current interaction rate of the electron neutrino beam component of the beam above $1.5$~GeV using the large fiducial mass of the T2K $\pi^0$ detector. The predominant poriton of the $\nu_e$ flux ($\sim$85 %) at these energies comes from kaon decays. The measured ratio of the observed beam interaction rate to the predicted rate in the detector with water targets filled is 0.89 $\pm$ 0.08 (stat.) $\pm$ 0.11 (sys.), and with the water targets emptied is 0.90 $\pm$ 0.09 (stat.) $\pm$ 0.13 (sys.). The ratio obtained for the interactions on water only from an event subtraction method is 0.87 $\pm$ 0.33 (stat.) $\pm$ 0.21 (sys.). This is the first measurement of the interaction rate of electron neutrinos on water, which is particularly of interest to experiments with water Cherenkov detectors., Comment: 11 pages, 6 figures, as accepted to PRD
Published: 2015
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20. Measurement of the $\nu_{\mu}$ charged current quasi-elastic cross-section on carbon with the T2K on-axis neutrino beam

Author: Abe, K., Adam, J., Aihara, H., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bartet-Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Ferchichi, C., Feusels, T., Finch, A. J., Fiorentini, G. A., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Garcia, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haegel, L., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayashino, T., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Hosomi, F., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, S., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Koga, T., Kolaceke, A., Konaka, A., Kopylov, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, J. P., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K. G., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Ovsyannikova, T., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Rychter, A., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaker, F., Shaw, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Wakamatsu, K., Walter, C. W., Wark, D., Warzycha, W., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoo, J., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: We report a measurement of the $\nu_\mu$ charged current quasi-elastic cross-sections on carbon in the T2K on-axis neutrino beam. The measured charged current quasi-elastic cross-sections on carbon at mean neutrino energies of 1.94 GeV and 0.93 GeV are $(11.95\pm 0.19(stat.)_{-1.47}^{+1.82} (syst.))\times 10^{-39}\mathrm{cm}^2/\mathrm{neutron}$ and $(10.64\pm 0.37(stat.)_{-1.65}^{+2.03} (syst.))\times 10^{-39}\mathrm{cm}^2/\mathrm{neutron}$, respectively. These results agree well with the predictions of neutrino interaction models. In addition, we investigated the effects of the nuclear model and the multi-nucleon interaction., Comment: 17 pages, 21 figures
Published: 2015
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21. Study of electron anti-neutrinos associated with gamma-ray bursts using KamLAND

Author: Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Oki, Y., Oura, T., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Tachibana, H., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Piepke, A., Banks, T. I., Berger, B. E., O'Donnell, T., Fujikawa, B. K., Maricic, J., Learned, J. G., Sakai, M., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract: We search for electron anti-neutrinos ($\overline{\nu}_e$) from long and short-duration gamma-ray bursts~(GRBs) using data taken by the KamLAND detector from August 2002 to June 2013. No statistically significant excess over the background level is found. We place the tightest upper limits on $\overline{\nu}_e$ fluence from GRBs below 7 MeV and place first constraints on the relation between $\overline{\nu}_e$ luminosity and effective temperature., Comment: 16 pages and 5 figures
Published: 2015
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22. Measurements of neutrino oscillation in appearance and disappearance channels by the T2K experiment with 6.6E20 protons on target

Author: T2K Collaboration, Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bartet-Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bolognesi, S., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Chikuma, N., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Feusels, T., Finch, A. J., Fiorentini, G. A., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Garcia, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haegel, L., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayashino, T., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Hosomi, F., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, S., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Koga, T., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, J. P., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K. G., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Ovsyannikova, T., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Rychter, A., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaker, F., Shaw, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Wakamatsu, K., Walter, C. W., Wark, D., Warzycha, W., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Żmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: We report on measurements of neutrino oscillation using data from the T2K long-baseline neutrino experiment collected between 2010 and 2013. In an analysis of muon neutrino disappearance alone, we find the following estimates and 68% confidence intervals for the two possible mass hierarchies: Normal Hierarchy: $\sin^2\theta_{23}=0.514^{+0.055}_{-0.056}$ and $\Delta m^2_{32}=(2.51\pm0.10)\times 10^{-3}$ eV$^2$/c$^4$ Inverted Hierarchy: $\sin^2\theta_{23}=0.511\pm0.055$ and $\Delta m^2_{13}=(2.48\pm0.10)\times 10^{-3}$ eV$^2$/c$^4$ The analysis accounts for multi-nucleon mechanisms in neutrino interactions which were found to introduce negligible bias. We describe our first analyses that combine measurements of muon neutrino disappearance and electron neutrino appearance to estimate four oscillation parameters and the mass hierarchy. Frequentist and Bayesian intervals are presented for combinations of these parameters, with and without including recent reactor measurements. At 90% confidence level and including reactor measurements, we exclude the region: $\delta_{CP}=[0.15,0.83]\pi$ for normal hierarchy and $\delta_{CP}=[-0.08,1.09]\pi$ for inverted hierarchy. The T2K and reactor data weakly favor the normal hierarchy with a Bayes Factor of 2.2. The most probable values and 68% 1D credible intervals for the other oscillation parameters, when reactor data are included, are: $\sin^2\theta_{23}=0.528^{+0.055}_{-0.038}$ and $|\Delta m^2_{32}|=(2.51\pm0.11)\times 10^{-3}$ eV$^2$/c$^4$., Comment: 111 pages, 45 figures, submitted to Physical Review D. Minor revisions to text following referee comments
Published: 2015
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23. Measurement of the $\nu_\mu$ CCQE cross section on carbon with the ND280 detector at T2K

Author: T2K Collaboration, Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bolognesi, S., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Dolan, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Feusels, T., Finch, A. J., Fiorentini, G. A., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Garcia, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haegel, L., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayashino, T., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, S., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, J. P., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K. G., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Ovsyannikova, T., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J. M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaker, F., Shaw, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Wakamatsu, K., Walter, C. W., Wark, D., Warzycha, W., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment, Nuclear Experiment
Abstract: The Charged-Current Quasi-Elastic (CCQE) interaction, $\nu_{l} + n \rightarrow l^{-} + p$, is the dominant CC process at $E_\nu \sim 1$ GeV and contributes to the signal in accelerator-based long-baseline neutrino oscillation experiments operating at intermediate neutrino energies. This paper reports a measurement by the T2K experiment of the $\nu_{\mu}$ CCQE cross section on a carbon target with the off-axis detector based on the observed distribution of muon momentum ($p_\mu$) and angle with respect to the incident neutrino beam ($\theta_\mu$). The flux-integrated CCQE cross section was measured to be $(0.83 \pm 0.12) \times 10^{-38}\textrm{ cm}^{2}$ in good agreement with NEUT MC value of ${0.88 \times 10^{-38}} \textrm{ cm}^{2}$. The energy dependence of the CCQE cross section is also reported. The axial mass, $M_A^{QE}$, of the dipole axial form factor was extracted assuming the Smith-Moniz CCQE model with a relativistic Fermi gas nuclear model. Using the absolute (shape-only) $p_{\mu}cos\theta_\mu$ distribution, the effective $M_A^{QE}$ parameter was measured to be ${1.26^{+0.21}_{-0.18} \textrm{ GeV}/c^{2}}$ (${1.43^{+0.28}_{-0.22} \textrm{ GeV}/c^{2}}$).
Published: 2014
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24. Search for short baseline $\nu_e$ disappearance with the T2K near detector

Author: Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Finch, A. J., Aguirre, G. A. Fiorentini, Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haegel, L., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayashino, T., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Jiang, M., Johnson, S., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Ovsyannikova, T., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shaker, F., Shaw, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Wakamatsu, K., Walter, C. W., Wark, D., Warzycha, W., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The T2K experiment has performed a search for $\nu_e$ disappearance due to sterile neutrinos using $5.9 \times 10^{20}$ protons on target for a baseline of $280 m$ in a neutrino beam peaked at about $500 MeV$. A sample of \nu_e CC interactions in the off-axis near detector has been selected with a purity of 63\% and an efficiency of 26\%. The p-value for the null hypothesis is 0.085 and the excluded region at 95\% CL is approximately $sin^2 2 \theta_{ee} > 0.3$ for $\Delta m^2_{eff} > 7 eV^2 / c^4$., Comment: 8 pages, 6 figures, submitted to PRD rapid communication
Published: 2014
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25. Neutrino Oscillation Physics Potential of the T2K Experiment

Author: Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bartet-Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodr'iguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Feusels, T., Finch, A. J., Fiorentini, G. A., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Garcia, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haegel, L., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayashino, T., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Johnson, S., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Koga, T., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, J. P., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martins, P., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K. G., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Ovsyannikova, T., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., S'anchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shah, R., Shaker, F., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Wakamatsu, K., Walter, C. W., Wark, D., Warzycha, W., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yoshida, K., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle $\theta_{13}$ have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal $\sin^22\theta_{23}$, the octant of $\theta_{23}$, and the mass hierarchy, in addition to the measurements of $\delta_{CP}$, $\sin^2\theta_{23}$, and $\Delta m^2_{32}$, for various combinations of $\nu$-mode and $\bar{\nu}$-mode data-taking. With an exposure of $7.8\times10^{21}$~protons-on-target, T2K can achieve 1-$\sigma$ resolution of 0.050(0.054) on $\sin^2\theta_{23}$ and $0.040(0.045)\times10^{-3}~\rm{eV}^2$ on $\Delta m^2_{32}$ for 100\%(50\%) neutrino beam mode running assuming $\sin^2\theta_{23}=0.5$ and $\Delta m^2_{32} = 2.4\times10^{-3}$ eV$^2$. T2K will have sensitivity to the CP-violating phase $\delta_{\rm{CP}}$ at 90\% C.L. or better over a significant range. For example, if $\sin^22\theta_{23}$ is maximal (i.e $\theta_{23}$=$45^\circ$) the range is $-115^\circ<\delta_{\rm{CP}}<-60^\circ$ for normal hierarchy and $+50^\circ<\delta_{\rm{CP}}<+130^\circ$ for inverted hierarchy. When T2K data is combined with data from the NO$\nu$A experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero $\delta_{CP}$ is substantially increased compared to if each experiment is analyzed alone., Comment: 40 pages, 27 figures, accepted by PTEP
Published: 2014
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26. Measurement of the Inclusive Electron Neutrino Charged Current Cross Section on Carbon with the T2K Near Detector

Author: Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Finch, A. J., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Metelko, C., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Żmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The T2K off-axis near detector, ND280, is used to make the first differential cross-section measurements of electron neutrino charged current interactions at energies ~1 GeV as a function of electron momentum, electron scattering angle and four-momentum transfer of the interaction. The total flux-averaged $\nu_e$ charged current cross-section on carbon is measured to be $1.11\pm0.09~(stat)\pm0.18~(syst)\times10^{-38} cm^2/nucleon$. The differential and total cross-section measurements agree with the predictions of two leading neutrino interaction generators, NEUT and GENIE. The NEUT prediction is $1.23\times10^{-38} cm^2/nucleon$ and the GENIE prediction is $1.08\times10^{-38} cm^2/nucleon$. The total $\nu_e$ charged current cross-section result is also in agreement with data from the Gargamelle experiment., Comment: Submitted to PRL. Please see http://t2k-experiment.org/results/nd280-nue-xs-2014 for the data releated to these results
Published: 2014
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27. Measurement of the inclusive $\nu_{\mu}$ charged current cross section on iron and hydrocarbon in the T2K on-axis neutrino beam

Author: The T2K Collaboration, Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B. E., Berkman, S., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Caravaca, J., Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de, P., De, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di, F., Di, S., Drapier, O., Duboyski, T., Duffy, K., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Finch, A. J., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martynenko, S., Maruyama, T., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Metelko, C., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Missert, A., Miura, M., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Pinzon, E. S., Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Żmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: We report a measurement of the $\nu_\mu$ inclusive charged current cross sections on iron and hydrocarbon in the T2K on-axis neutrino beam. The measured inclusive charged current cross sections on iron and hydrocarbon averaged over the T2K on-axis flux with a mean neutrino energy of 1.51 GeV are $(1.444\pm0.002(stat.)_{-0.157}^{+0.189}(syst.))\times 10^{-38}\mathrm{cm}^2/\mathrm{nucleon}$, and $(1.379\pm0.009(stat.)_{-0.147}^{+0.178}(syst.))\times 10^{-38}\mathrm{cm}^2/\mathrm{nucleon}$, respectively, and their cross section ratio is $1.047\pm0.007(stat.)\pm0.035(syst.)$. These results agree well with the predictions of the neutrino interaction model, and thus we checked the correct treatment of the nuclear effect for iron and hydrocarbon targets in the model within the measurement precisions., Comment: 15 pages, 17 figures
Published: 2014
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28. A compact ultra-clean system for deploying radioactive sources inside the KamLAND detector

Author: Banks, T. I., Freedman, S. J., Wallig, J., Ybarrolaza, N., Gando, A., Gando, Y., Ikeda, H., Inoue, K., Kishimoto, Y., Koga, M., Mitsui, T., Nakamura, K., Shimizu, I., Shirai, J., Suzuki, A., Takemoto, Y., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yoshida, H., Yoshida, S., Kozlov, A., Grant, C., Keefer, G., Piepke, A., Bloxham, T., Fujikawa, B. K., Han, K., Ichimura, K., Murayama, H., O'Donnell, T., Steiner, H. M., Winslow, L. A., Dwyer, D. A., McKeown, R. D., Zhang, C., Berger, B. E., Lane, C. E., Maricic, J., Miletic, T., Batygov, M., Learned, J. G., Matsuno, S., Sakai, M., Horton-Smith, G. A., Downum, K. E., Gratta, G., Efremenko, Y., Perevozchikov, O., Karwowski, H. J., Markoff, D. M., Tornow, W., Heeger, K. M., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract: We describe a compact, ultra-clean device used to deploy radioactive sources along the vertical axis of the KamLAND liquid-scintillator neutrino detector for purposes of calibration. The device worked by paying out and reeling in precise lengths of a hanging, small-gauge wire rope (cable); an assortment of interchangeable radioactive sources could be attached to a weight at the end of the cable. All components exposed to the radiopure liquid scintillator were made of chemically compatible UHV-cleaned materials, primarily stainless steel, in order to avoid contaminating or degrading the scintillator. To prevent radon intrusion, the apparatus was enclosed in a hermetically sealed housing inside a glove box, and both volumes were regularly flushed with purified nitrogen gas. An infrared camera attached to the side of the housing permitted real-time visual monitoring of the cable's motion, and the system was controlled via a graphical user interface., Comment: Revised author affiliations, corrected typos, made minor improvements to text, and revised references
Published: 2014
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29. 7Be Solar Neutrino Measurement with KamLAND

Author: Gando, A., Gando, Y., Hanakago, H., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, H., Kishimoto, Y., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakajima, K., Nakamura, K., Obata, A., Oki, A., Oki, Y., Otani, M., Shimizu, I., Shirai, J., Suzuki, A., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamada, S., Yamauchi, Y., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshida, S., Grant, C., Keefer, G., McKee, D. W., Piepke, A., Banks, T. I., Bloxham, T., Freedman, S. J., Fujikawa, B. K., Han, K., Hsu, L., Ichimura, K., Murayama, H., O'Donnell, T., Steiner, H. M., Winslow, L. A., Dwyer, D., Mauger, C., McKeown, R. D., Zhang, C., Berger, B. E., Lane, C. E., Maricic, J., Miletic, T., Learned, J. G., Sakai, M., Horton-Smith, G. A., Tang, A., Downum, K. E., Tolich, K., Efremenko, Y., Kamyshkov, Y., Perevozchikov, O., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., Heeger, K., and Decowski, M. P.
Subjects: High Energy Physics - Experiment, Astrophysics - Solar and Stellar Astrophysics, Nuclear Experiment
Abstract: We report a measurement of the neutrino-electron elastic scattering rate of 862 keV 7Be solar neutrinos based on a 165.4 kton-day exposure of KamLAND. The observed rate is 582 +/- 90 (kton-day)^-1, which corresponds to a 862 keV 7Be solar neutrino flux of (3.26 +/- 0.50) x 10^9 cm^-2s^-1, assuming a pure electron flavor flux. Comparing this flux with the standard solar model prediction and further assuming three flavor mixing, a nu_e survival probability of 0.66 +/- 0.14 is determined from the KamLAND data. Utilizing a global three flavor oscillation analysis, we obtain a total 7Be solar neutrino flux of (5.82 +/- 0.98) x 10^9 cm^-2s^-1, which is consistent with the standard solar model predictions., Comment: 8 pages, 6 figures, submitted to Phys. Rev. C
Published: 2014
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30. Measurement of the neutrino-oxygen neutral-current interaction cross section by observing nuclear deexcitation $\gamma$ rays

Author: Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Dewhurst, D., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery-Schrenk, S., Ereditato, A., Escudero, L., Finch, A. J., Aguirre, G. A. Fiorentini, Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haegel, L., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Ives, S. J., Iwai, E., Iwamoto, K., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Johnson, S., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., King, S., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Larkin, E., Laveder, M., Lawe, M., Lazos, M., Lee, K. P., Licciardi, C., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Martynenko, S., Maruyama, T., Marzec, J., Mathie, E. L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Mefodiev, A., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nantais, C., Naples, D., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., Nowak, J., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Ovsyannikova, T., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Pearce, G. F., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala-Zezula, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Riccio, C., Retiere, F., Robert, A., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shaker, F., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Taylor, I. J., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Żmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: We report the first measurement of the neutrino-oxygen neutral-current quasielastic (NCQE) cross section. It is obtained by observing nuclear deexcitation $\gamma$-rays which follow neutrino-oxygen interactions at the Super-Kamiokande water Cherenkov detector. We use T2K data corresponding to $3.01 \times 10^{20}$ protons on target. By selecting only events during the T2K beam window and with well-reconstructed vertices in the fiducial volume, the large background rate from natural radioactivity is dramatically reduced. We observe 43 events in the $4-30$ MeV reconstructed energy window, compared with an expectation of 51.0, which includes an estimated 16.2 background events. The background is primarily nonquasielastic neutral-current interactions and has only 1.2 events from natural radioactivity. The flux-averaged NCQE cross section we measure is $1.55 \times 10^{-38}$ cm$^2$ with a 68\% confidence interval of $(1.22, 2.20) \times 10^{-38}$ cm$^2$ at a median neutrino energy of 630 MeV, compared with the theoretical prediction of $2.01 \times 10^{-38}$ cm$^2$., Comment: 10 pages, 6 figures
Published: 2014
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31. Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector

Author: T2K Collaboration, Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A. J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Ives, S. J., Iwai, E., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Laveder, M., Lawe, M., Lazos, M., Lee, K. P., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Mathie, E. L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Owen, R. A., Oyama, Y., Palladino, V., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The T2K experiment has reported the first observation of the appearance of electron neutrinos in a muon neutrino beam. The main and irreducible background to the appearance signal comes from the presence in the neutrino beam of a small intrinsic component of electron neutrinos originating from muon and kaon decays. In T2K, this component is expected to represent 1.2% of the total neutrino flux. A measurement of this component using the near detector (ND280), located 280 m from the target, is presented. The charged current interactions of electron neutrinos are selected by combining the particle identification capabilities of both the time projection chambers and electromagnetic calorimeters of ND280. The measured ratio between the observed electron neutrino beam component and the prediction is 1.01+-0.10 providing a direct confirmation of the neutrino fluxes and neutrino cross section modeling used for T2K neutrino oscillation analyses. Electron neutrinos coming from muons and kaons decay are also separately measured, resulting in a ratio with respect to the prediction of 0.68+-0.30 and 1.10+-0.14, respectively., Comment: 19 pages, 19 figures
Published: 2014
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32. Precise Measurement of the Neutrino Mixing Parameter \theta_{23} from Muon Neutrino Disappearance in an Off-axis Beam

Author: T2K Collaboration, Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A. J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Ives, S. J., Iwai, E., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Jung, C. K., Kabirnezhad, M., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Laveder, M., Lawe, M., Lazos, M., Lee, K. P., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Mathie, E. L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Owen, R. A., Oyama, Y., Palladino, V., Palomino, J., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schoppmann, S., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Yu, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: New data from the T2K neutrino oscillation experiment produce the most precise measurement of the neutrino mixing parameter theta_{23}. Using an off-axis neutrino beam with a peak energy of 0.6 GeV and a data set corresponding to 6.57 x 10^{20} protons on target, T2K has fit the energy-dependent nu_mu oscillation probability to determine oscillation parameters. Marginalizing over the values of other oscillation parameters yields sin^2 (theta_{23}) = 0.514 +0.055/-0.056 (0.511 +- 0.055), assuming normal (inverted) mass hierarchy. The best-fit mass-squared splitting for normal hierarchy is Delta m^2_{32} = (2.51 +- 0.10) x 10^{-3} eV^2/c^4 (inverted hierarchy: Delta m^2_{13} = (2.48 +- 0.10) x 10^{-3} eV^2/c^4). Adding a model of multinucleon interactions that affect neutrino energy reconstruction is found to produce only small biases in neutrino oscillation parameter extraction at current levels of statistical uncertainty., Comment: 8 pages, 4 figures. Final version as published in PRL, with very minor changes from initial version in response to referee comments
Published: 2014

33. CeLAND: search for a 4th light neutrino state with a 3 PBq 144Ce-144Pr electron antineutrino generator in KamLAND

Author: Gando, A., Gando, Y., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, H., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Oki, Y., Otani, M., Shimizu, I., Shirai, J., Suekane, F., Suzuki, A., Takemoto, Y., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamada, S., Yamauchi, Y., Yoshida, H., Cribier, M., Durero, M., Fischer, V., Gaffiot, J., Jonqueres, N., Kouchner, A., Lasserre, T., Leterme, D., Letourneau, A., Lhuillier, D., Mention, G., Rampal, G., Scola, L., Veyssiere, Ch., Vivier, M., Yala, P., Berger, B. E., Kozlov, A., Banks, T., Dwyer, D., Fujikawa, B. K., Han, K., Kolomensky, Yu. G., Mei, Y., O'Donnell, T., Decowski, P., Markoff, D. M., Yoshida, S., Kornoukhov, V. N., Gelis, T. V. M., Tikhomirov, G. V., Learned, J. G., Maricic, J., Matsuno, S., Milincic, R., Karwowski, H. J., Efremenko, Y., Detwiler, A., and Enomoto, S.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: The reactor neutrino and gallium anomalies can be tested with a 3-4 PBq (75-100 kCi scale) 144Ce-144Pr antineutrino beta-source deployed at the center or next to a large low-background liquid scintillator detector. The antineutrino generator will be produced by the Russian reprocessing plant PA Mayak as early as 2014, transported to Japan, and deployed in the Kamioka Liquid Scintillator Anti-Neutrino Detector (KamLAND) as early as 2015. KamLAND's 13 m diameter target volume provides a suitable environment to measure the energy and position dependence of the detected neutrino flux. A characteristic oscillation pattern would be visible for a baseline of about 10 m or less, providing a very clean signal of neutrino disappearance into a yet-unknown, sterile neutrino state. This will provide a comprehensive test of the electron dissaperance neutrino anomalies and could lead to the discovery of a 4th neutrino state for Delta_m^2 > 0.1 eV^2 and sin^2(2theta) > 0.05., Comment: 67 pages, 50 figures. Th. Lasserre thanks the European Research Council for support under the Starting Grant StG-307184
Published: 2013

34. Laboratory Studies on the Removal of Radon-Born Lead from KamLAND's Organic Liquid Scintillator

Author: Keefer, G., Grant, C., Piepke, A., Ebihara, T., Ikeda, H., Kishimoto, Y., Kibe, Y., Koseki, Y., Ogawa, M., Shirai, J., Takeuchi, S., Mauger, C., Zhang, C., Schweitzer, G., Berger, B. E., Dazeley, S., Decowski, M. P., Detwiler, J. A., Djurcic, Z., Dwyer, D. A., Efremenko, Y., Enomoto, S., Freedman, S. J., Fujikawa, B. K., Furuno, K., Gando, A., Gando, Y., Gratta, G., Hatakeyama, S., Heeger, K. M., Hsu, L., Ichimura, K., Inoue, K., Iwamoto, T., Kamyshkov, Y., Karwowski, H. J., Koga, M., Kozlov, A., Lane, C. E., Learned, J. G., Maricic, J., Marko, D. M., Matsuno, S., McKee, D., McKeown, R. D., Miletic, T., Mitsui, T., Motoki, M., Nakajima, K., Nakamura, K., O'Donnell, T., Ogawa, H., Piquemal, F., Ricol, J. -S., Shimizu, I., Suekane, F., Suzuki, A., Svoboda, R., Tajima, O., Takemoto, Y., Tamae, K., Tolich, K., Tornow, W., Watanabe, Hideki, Watanabe, Hiroko, Winslow, L. A., and Yoshida, S.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract: The removal of radioactivity from liquid scintillator has been studied in preparation of a low background phase of KamLAND. This paper describes the methods and techniques developed to measure and efficiently extract radon decay products from liquid scintillator. We report the radio-isotope reduction factors obtained when applying various extraction methods. During this study, distillation was identified as the most efficient method for removing radon daughters from liquid scintillator.
Published: 2013

35. solar neutrino measurement with KamLAND

Author: Gando, A., Gando, Y., Hanakago, H., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, H., Kishimoto, Y., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakajima, K., Nakamura, K., Obata, A., Oki, A., Oki, Y., Otani, M., Shimizu, I., Shirai, J., Suzuki, A., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamada, S., Yamauchi, Y., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshida, S., Grant, C., Keefer, G., McKee, D. W., Piepke, A., Banks, T. I., Bloxham, T., Freedman, S. J., Fujikawa, B. K., Han, K., Hsu, L., Ichimura, K., Murayama, H., O'Donnell, T., Steiner, H. M., Winslow, L. A., Dwyer, D., Mauger, C., McKeown, R. D., Zhang, C., Berger, B. E., Lane, C. E., Maricic, J., Miletic, T., Learned, J. G., Sakai, M., Horton-Smith, G. A., Tang, A., Downum, K. E., Tolich, K., Efremenko, Y., Kamyshkov, Y., Perevozchikov, O., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., Heeger, K., and Decowski, M. P.
Published: 2015

36. Search for the proton decay mode with KamLAND

Author: Asakura, K., Gando, A., Gando, Y., Hachiya, T., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, T., Ishio, S., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Obara, S., Oki, Y., Oura, T., Shimizu, I., Shirahata, Y., Shirai, J., Suzuki, A., Tachibana, H., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamauchi, Y., Yoshida, H., Kozlov, A., Takemoto, Y., Yoshida, S., Fushimi, K., Grant, C., Piepke, A., Banks, T. I., Berger, B. E., Freedman, S. J., Fujikawa, B. K., O’Donnell, T., Learned, J. G., Maricic, J., Sakai, M., Dazeley, S., Svoboda, R., Winslow, L. A., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Detwiler, J. A., Enomoto, S., and Decowski, M. P.
Published: 2015

37. Observation of Electron Neutrino Appearance in a Muon Neutrino Beam

Author: Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bordoni, S., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Duffy, K., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A. J., Floetotto, L., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Goeldi, D., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Ives, S. J., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Jung, C. K., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kisiel, J., Kitching, P., Kobayashi, T., Koch, L., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Lamont, I., Laveder, M., Lawe, M., Lazos, M., Lee, K. P., Licciardi, C., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Mathie, E. L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCarthy, M., McCauley, N., McFarland, K. S., McGrew, C., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Owen, R. A., Oyama, Y., Palladino, V., Paolone, V., Payne, D., Pearce, G. F., Perevozchikov, O., Perkin, J. D., Petrov, Y., Pickard, L. J., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P. A., Rojas, P., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sánchez, F., Sato, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. K., Tanaka, H. A., Tanaka, M. M., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Żmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The T2K experiment has observed electron neutrino appearance in a muon neutrino beam produced 295 km from the Super-Kamiokande detector with a peak energy of 0.6 GeV. A total of 28 electron neutrino events were detected with an energy distribution consistent with an appearance signal, corresponding to a significance of 7.3$\sigma$ when compared to 4.92 $\pm$ 0.55 expected background events. In the PMNS mixing model, the electron neutrino appearance signal depends on several parameters including three mixing angles $\theta_{12}$, $\theta_{23}$, $\theta_{13}$, a mass difference $\Delta m^2_{32}$ and a CP violating phase $\delta_{\mathrm{CP}}$. In this neutrino oscillation scenario, assuming $|\Delta m^2_{32}| = 2.4 \times 10^{-3}$ $\rm eV^2$, $\sin^2 \theta_{23} = 0.5$, and $\Delta m^2_{32} >0$ ($\Delta m^2_{32} <0$), a best-fit value of $\sin^2 2 \theta_{13}$ = $0.140^{+0.038}_{-0.032}$ ($0.170^{+0.045}_{-0.037}$) is obtained at $\delta_{\mathrm{CP}}=0$. When combining the result with the current best knowledge of oscillation parameters including the world average value of $\theta_{13}$ from reactor experiments, some values of $\delta_{\mathrm{CP}}$ are disfavored at the 90% CL., Comment: 8 pages, 6 figures
Published: 2013
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38. White paper: CeLAND - Investigation of the reactor antineutrino anomaly with an intense 144Ce-144Pr antineutrino source in KamLAND

Author: Gando, A., Gando, Y., Hayashida, S., Ikeda, H., Inoue, K., Ishidoshiro, K., Ishikawa, H., Koga, M., Matsuda, R., Matsuda, S., Mitsui, T., Motoki, D., Nakamura, K., Oki, Y., Otani, M., Shimizu, I., Shirai, J., Suekane, F., Suzuki, A., Takemoto, Y., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamada, S., Yamauchi, Y., Yoshida, H., Banks, T., Berger, B. E., Cribier, M., Decowski, P., Detwiler, J. A., Durero, M., Dwyer, D., Efremenko, Y., Enomoto, S., Fischer, V., Fujikawa, B. K., Gaffiot, J., Gelis, V. M., Karwowski, H. J., Kolomensky, Yu. G., Kozlov, A., Kornoukhov, V. N., Lasserre, T., Learned, J. G., Letourneau, A., Lhuillier, D., Maricic, J., Markoff, D. M., Matsuno, S., Mention, G., Milincic, R., ODonnell, T., Saldikov, I. S., Scola, L., Tikhomirov, G. V., Veyssiere, Ch., Vivier, M., and Yoshida, S.
Subjects: High Energy Physics - Experiment
Abstract: We propose to test for short baseline neutrino oscillations, implied by the recent reevaluation of the reactor antineutrino flux and by anomalous results from the gallium solar neutrino detectors. The test will consist of producing a 75 kCi 144Ce - 144Pr antineutrino source to be deployed in the Kamioka Liquid Scintillator Anti-Neutrino Detector (KamLAND). KamLAND's 13m diameter target volume provides a suitable environment to measure energy and position dependence of the detected neutrino flux. A characteristic oscillation pattern would be visible for a baseline of about 10 m or less, providing a very clean signal of neutrino disappearance into a yet-unknown, "sterile" state. Such a measurement will be free of any reactor-related uncertainties. After 1.5 years of data taking the Reactor Antineutrino Anomaly parameter space will be tested at > 95% C.L., Comment: White paper prepared for Snowmass-2013; slightly different author list
Published: 2013

39. Measurement of Neutrino Oscillation Parameters from Muon Neutrino Disappearance with an Off-axis Beam

Author: T2K collaboration, Abe, K., Abgrall, N., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S. B., Brailsford, D., Bravar, A., Bronner, C., Buchanan, N., Calland, R. G., Rodriguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Di Lodovico, F., Di Luise, S., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Emery, S., Ereditato, A., Escudero, L., Finch, A. J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Ives, S. J., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Joo, K. K., Jung, C. K., Kaboth, A. C., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J., Kim, S. B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laveder, M., Lawe, M., Lazos, M., Lee, K. P., Licciardi, C., Lim, I. T., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, G. D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E. L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., Metelko, C., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Pac, M. Y., Palladino, V., Paolone, V., Payne, D., Pearce, G. F., Perevozchikov, O., Perkin, J. D., Petrov, Y., Guerra, E. S. Pinzon, Pistillo, C., Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Redij, A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suda, Y., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. A., Tanaka, M. M., Taylor, I. J., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The T2K collaboration reports a precision measurement of muon neutrino disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV. Near detector measurements are used to constrain the neutrino flux and cross section parameters. The Super-Kamiokande far detector, which is 295 km downstream of the neutrino production target, collected data corresponding to $3.01 \times 10^{20}$ protons on target. In the absence of neutrino oscillations, $205 \pm 17$ (syst.) events are expected to be detected and only 58 muon neutrino event candidates are observed. A fit to the neutrino rate and energy spectrum assuming three neutrino flavors, normal mass hierarchy and $\theta_{23}\leq \pi/4$ yields a best-fit mixing angle $\sin^2(2\theta_{23})=1.000$ and mass splitting $|\Delta m^2_{32}| =2.44 \times 10^{-3}$ eV$^2$/c$^4$. If $\theta_{23}\geq \pi/4$ is assumed, the best-fit mixing angle changes to $\sin^2(2\theta_{23})=0.999$ and the mass splitting remains unchanged., Comment: 8 pages, 4 figures, revised version accepted for publication in Physical Review Letters
Published: 2013
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40. Evidence of Electron Neutrino Appearance in a Muon Neutrino Beam

Author: T2K Collaboration, Abe, K., Abgrall, N., Aihara, H., Akiri, T., Albert, J. B., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S., Brailsford, D., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Calland, R. G., Rodriguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., Day, M., de Andre, J. P. A. M., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S., Densham, C., Di Lodovico, F., Di Luise, S., Dobson, J., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Finch, A. J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Hirota, S., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Ives, S. J., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Joo, K. K., Jung, C. K., Kaboth, A., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J. Y., Kim, J., Kim, S. B., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kowalik, K., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lazos, M., Lee, K. P., Licciardi, C., Lim, I. T., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, G. D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E. L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nicholls, T. C., Nielsen, C., Nirkko, M., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Obayashi, Y., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Pac, M. Y., Palladino, V., Paolone, V., Payne, D., Pearce, G. F., Perevozchikov, O., Perkin, J. D., Petrov, Y., Guerra, E. S. Pinzon, Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shibata, M., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. A., Tanaka, M. M., Tanaka, M., Taylor, I. J., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The T2K collaboration: reports evidence for electron neutrino appearance at the atmospheric mass splitting, |\Delta m_{32}^2|=2.4x10^{-3} eV^2. An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy of 0.6 GeV at the Super-Kamiokande (SK) detector 295 km from the beam's origin. Signal and background predictions are constrained by data from near detectors located 280 m from the neutrino production target. We observe 11 electron neutrino candidate events at the SK detector when a background of 3.3\pm0.4(syst.) events is expected. The background-only hypothesis is rejected with a p-value of 0.0009 (3.1\sigma), and a fit assuming \nu_{\mu}->\nu_e oscillations with sin^2(2\theta_{23})=1, \delta_{CP}=0 and |\Delta m_{32}^2|=2.4x10^{-3} eV^2 yields sin^2(2\theta_{13})=0.088^{+0.049}_{-0.039}(stat.+syst.)., Comment: 43 pages, 41 figures
Published: 2013
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41. Measurement of the Inclusive NuMu Charged Current Cross Section on Carbon in the Near Detector of the T2K Experiment

Author: T2K Collaboration, Abe, K., Abgrall, N., Aihara, H., Akiri, T., Albert, J. B., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S., Brailsford, D., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Calland, R. G., Rodríguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Cremonesi, L., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., Day, M., de Andre, J. P. A. M., de Perio, P., De Rosa, G., Dealtry, T., Dennis, S. R., Densham, C., Di Lodovico, F., Di Luise, S., Dobson, J., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Finch, A. J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Furmanski, A. P., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Guzowski, P., Hadley, D. R., Haesler, A., Haigh, M. D., Hamilton, P., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hierholzer, M., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Holeczek, J., Horikawa, S., Huang, K., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Irvine, T. J., Ishida, T., Ishii, T., Ives, S. J., Iyogi, K., Izmaylov, A., Jacob, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Joo, K. K., Jung, C. K., Kaboth, A., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J. Y., Kim, J., Kim, S. B., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Kolaceke, A., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kowalik, K., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lee, K. P., Licciardi, C., Lim, I. T., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, G. D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E. L., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nicholls, T. C., Nielsen, C., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Obayashi, Y., Ohta, R., Okumura, K., Okusawa, T., Oryszczak, W., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Pac, M. Y., Palladino, V., Paolone, V., Payne, D., Pearce, G. F., Perevozchikov, O., Perkin, J. D., Guerra, E. S. Pinzon, Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M. A. M., Reeves, M., Reinherz-Aronis, E., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Sgalaberna, D., Shibata, M., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. A., Tanaka, M. M., Tanaka, M., Taylor, I. J., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wang, J., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: T2K has performed the first measurement of \nu{\mu} inclusive charged current interactions on carbon at neutrino energies of ~1 GeV where the measurement is reported as a flux-averaged double differential cross section in muon momentum and angle. The flux is predicted by the beam Monte Carlo and external data, including the results from the NA61/SHINE experiment. The data used for this measurement were taken in 2010 and 2011, with a total of 10.8 x 10^{19} protons-on-target. The analysis is performed on 4485 inclusive charged current interaction candidates selected in the most upstream fine-grained scintillator detector of the near detector. The flux-averaged total cross section is <\sigma_CC>_\phi =(6.91 +/- 0.13 (stat) +/- 0.84 (syst)) x10^{-39} cm^2/nucleon for a mean neutrino energy of 0.85 GeV.
Published: 2013
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42. The T2K Neutrino Flux Prediction

Author: T2K Collaboration, Abe, K., Abgrall, N., Aihara, H., Akiri, T., Albert, J. B., Andreopoulos, C., Aoki, S., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S. W., Berardi, V., Berger, B. E., Berkman, S., Bertram, I., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Boyd, S., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Calland, R. G., Rodriguez, J. Caravaca, Cartwright, S. L., Castillo, R., Catanesi, M. G., Cervera, A., Cherdack, D., Christodoulou, G., Clifton, A., Coleman, J., Coleman, S. J., Collazuol, G., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davis, S., Day, M., de Andre, J. P. A. M., de Perio, P., De Rosa, G., Dealtry, T., Densham, C., Di Lodovico, F., Di Luise, S., Dobson, J., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Esposito, L. S., Finch, A. J., Frank, E., Friend, M., Fujii, Y., Fukuda, Y., Galymov, V., Gaudin, A., Giffin, S., Giganti, C., Gilje, K., Golan, T., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Gudin, D., Guzowski, P., Hadley, D. R., Haesler, A., Haigh, M. D., Hansen, D., Hara, T., Hartz, M., Hasegawa, T., Hastings, N. C., Hayato, Y., Hearty, C., Helmer, R. L., Hignight, J., Hillairet, A., Himmel, A., Hiraki, T., Holeczek, J., Horikawa, S., Huang, K., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Ikeda, M., Imber, J., Insler, J., Ishida, T., Ishii, T., Ives, S. J., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Jo, J. H., Jonsson, P., Joo, K. K., Jover-Manas, G. V., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kanazawa, Y., Karlen, D., Karpikov, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kilinski, A., Kim, J. Y., Kim, J., Kim, S. B., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kowalik, K., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kumaratunga, S., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lee, K. P., Licciardi, C., Lim, I. T., Lindner, T., Lister, C., Litchfield, R. P., Longhin, A., Lopez, G. D., Ludovici, L., Macaire, M., Magaletti, L., Mahn, K., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A., Miura, M., Monfregola, L., Moriyama, S., Mueller, Th. A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nagasaki, T., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Nicholls, T. C., Nielsen, C., Nishikawa, K., Nishimura, Y., O'Keeffe, H. M., Obayashi, Y., Ohta, R., Okumura, K., Oryszczak, W., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Pac, M. Y., Palladino, V., Paolone, V., Payne, D., Pearce, G. F., Perevozchikov, O., Perkin, J. D., Guerra, E. S. Pinzon, Plonski, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Quilain, B., Radicioni, E., Rato, P. N., Ravonel, M., Rayner, M. A., Reeves, M., Reinherz-Aronis, E., Retiere, F., Rodrigues, P. A., Rondio, E., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sakashita, K., Sanchez, F., Scantamburlo, E., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shiozawa, M., Short, S., Shustrov, Y., Sinclair, P., Smith, B., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Southwell, L., Stamoulis, P., Steinmann, J., Still, B., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takeuchi, Y., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Taylor, I. J., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Tobayama, S., Toki, W., Tomura, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Waldron, A. V., Walter, C. W., Wang, J., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wikstrom, G., Wilkes, R. J., Wilking, M. J., Wilkinson, C., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, Y., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axis muon neutrino beam with a peak energy of about 0.6 GeV that originates at the J-PARC accelerator facility. Interactions of the neutrinos are observed at near detectors placed at 280 m from the production target and at the far detector -- Super-Kamiokande (SK) -- located 295 km away. The flux prediction is an essential part of the successful prediction of neutrino interaction rates at the T2K detectors and is an important input to T2K neutrino oscillation and cross section measurements. A FLUKA and GEANT3 based simulation models the physical processes involved in the neutrino production, from the interaction of primary beam protons in the T2K target, to the decay of hadrons and muons that produce neutrinos. The simulation uses proton beam monitor measurements as inputs. The modeling of hadronic interactions is re-weighted using thin target hadron production data, including recent charged pion and kaon measurements from the NA61/SHINE experiment. For the first T2K analyses the uncertainties on the flux prediction are evaluated to be below 15% near the flux peak. The uncertainty on the ratio of the flux predictions at the far and near detectors is less than 2% near the flux peak., Comment: 36 pages
Published: 2012
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43. Limits on Majoron-emitting double-beta decays of Xe-136 in the KamLAND-Zen experiment

Author: Collaboration, KamLAND-Zen, Gando, A., Gando, Y., Hanakago, H., Ikeda, H., Inoue, K., Kato, R., Koga, M., Matsuda, S., Mitsui, T., Nakada, T., Nakamura, K., Obata, A., Oki, A., Ono, Y., Shimizu, I., Shirai, J., Suzuki, A., Takemoto, Y., Tamae, K., Ueshima, K., Watanabe, H., Xu, B. D., Yamada, S., Yoshida, H., Kozlov, A., Yoshida, S., Banks, T. I., Detwiler, J. A., Freedman, S. J., Fujikawa, B. K., Han, K., O'Donnell, T., Berger, B. E., Efremenko, Y., Karwowski, H. J., Markoff, D. M., Tornow, W., Enomoto, S., and Decowski, M. P.
Subjects: High Energy Physics - Experiment, Nuclear Experiment
Abstract: We present limits on Majoron-emitting neutrinoless double-beta decay modes based on an exposure of 112.3 days with 125 kg of Xe-136. In particular, a lower limit on the ordinary (spectral index n = 1) Majoron-emitting decay half-life of Xe-136 is obtained as T_{1/2}^{0\nu\chi^{0}} > 2.6 x 10^{24} yr at 90% C.L., a factor of five more stringent than previous limits. The corresponding upper limit on the effective Majoron-neutrino coupling, using a range of available nuclear matrix calculations, is < (0.8 - 1.6) x 10^{-5}. This excludes a previously unconstrained region of parameter space and strongly limits the possible contribution of ordinary Majoron emission modes to 0\nu\beta\beta decay for neutrino masses in the inverted hierarchy scheme., Comment: 4 pages, 3 figures (1 figure added). Published version in PRC rapid communication
Published: 2012
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44. First Muon-Neutrino Disappearance Study with an Off-Axis Beam

Author: T2K Collaboration, Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J. B., Andreopoulos, C., Andrieu, B., Anerella, M. D., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blocki, J., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S. B., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Budd, H., Calland, R., Calvet, D., Rodriguez, J. Caravaca, Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Collazuol, G., Coleman, W., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G. S., Davis, S., Day, M., De Rosa, G., de André, J. P. A. M., de Perio, P., Dealtry, T., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P. Dinh, Dobson, J., Dore, U., Drapier, O., Duboyski, T., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escallier, J. E., Escudero, L., Esposito, L. S., Fechner, M., Ferrero, A., Finch, A. J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Ganetis, G. L., Gannaway, F. C., Gaudin, A., Gendotti, A., George, M. A., Giffin, S., Giganti, C., Gilje, K., Ghosh, A. K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gomi, S., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Hadley, D. R., Haesler, A., Haigh, M. D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N. C., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R. L., Henderson, R., Higashi, N., Hignight, J., Hillairet, A., Hiraki, T., Hirose, E., Holeczek, J., Horikawa, S., Huang, K., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G. V., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kawamuko, H., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J. Y., Kim, S. B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurimoto, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laing, A., Laveder, M., Lawe, M., Lee, K. P., Le, P. T., Levy, J. M., Licciardi, C., Lim, I. T., Lindner, T., Lister, C., Litchfield, R. P., Litos, M., Longhin, A., Lopez, G. D., Loverre, P. F., Ludovici, L., Lux, T., Macaire, M., Magaletti, L., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marone, A. J., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A. D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Muratore, J. F., Murdoch, M., Murphy, S., Myslik, J., Nagai, N., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Nakayoshi, K., Naples, D., Navin, M. L., Nicholls, T. C., Nielsen, B., Nielsen, C., Nishikawa, K., Nishino, H., Nitta, K., Nobuhara, T., Nowak, J. A., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Perkin, J. D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ratoff, P. N., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roney, J. M., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sabouri, S., Sacco, R., Sakashita, K., Sánchez, F., Sarrat, A., Sasaki, K., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Sinclair, P. D., Siyad, M., Smith, B. M., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Stodulski, M., Strabel, C., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Toki, W., Tobayama, S., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Veledar, O., Wachala, T., Walding, J. J., Waldron, A. V., Walter, C. W., Wanderer, P. J., Wang, J., Ward, M. A., Ward, G. P., Wark, D., Wascko, M. O., Weber, A., Wendell, R., West, N., Whitehead, L. H., Wikström, G., Wilkes, R. J., Wilking, M. J., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yamauchi, T., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43 10**20 protons on target, we observe 31 fully-contained single muon-like ring events in Super-Kamiokande, compared with an expectation of 104 +- 14 (syst) events without neutrino oscillations. The best-fit point for two-flavor nu_mu -> nu_tau oscillations is sin**2(2 theta_23) = 0.98 and |\Delta m**2_32| = 2.65 10**-3 eV**2. The boundary of the 90 % confidence region includes the points (sin**2(2 theta_23),|\Delta m**2_32|) = (1.0, 3.1 10**-3 eV**2), (0.84, 2.65 10**-3 eV**2) and (1.0, 2.2 10**-3 eV**2)., Comment: 7 pages, 4 figures
Published: 2012
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45. The T2K ND280 Off-Axis Pi-Zero Detector

Author: Assylbekov, S., Berger, B. E., Berns, H., Beznosko, D., Bodek, A., Bradford, R., Buchanan, N., Budd, H., Caffari, Y., Connolly, K., Danko, I., Das, R., Davis, S., Day, M., Dytman, S., Dziomba, M., Flight, R., Forbush, D., Gilje, K., Hansen, D., Hignight, J., Imber, J., Johnson, R. A., Jung, C. K., Kravtsov, V., Le, P. T., Lopez, G. D., Malafis, C. J., Manly, S., Marino, A. D., McFarland, K. S., McGrew, C., Metelko, C., Nagashima, G., Naples, D., Nielsen, B., Paolone, V., Paul, P., Qian, W., Ramos, K., Rodrigues, P. A., Ruterbories, D., Schmidt, J., Schwehr, J., Siyad, M., Steffens, J., Tadepalli, A. S., Taylor, I. J., Toki, W., Vanek, C., Warner, D., Weber, A., Wilkes, R. J., Wilson, R. J., Yanagisawa, C., and Yuan, T.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: The Pi-Zero detector (P{\O}D) is one of the subdetectors that makes up the off-axis near detector for the Tokai-to-Kamioka (T2K) long baseline neutrino experiment. The primary goal for the P{\O}D is to measure the relevant cross sections for neutrino interactions that generate pi-zero's, especially the cross section for neutral current pi-zero interactions, which are one of the dominant sources of background to the electron neutrino appearance signal in T2K. The P{\O}D is composed of layers of plastic scintillator alternating with water bags and brass sheets or lead sheets and is one of the first detectors to use Multi-Pixel Photon Counters (MPPCs) on a large scale., Comment: 17 pages, submitted to NIM A
Published: 2011
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46. Measurements of the T2K neutrino beam properties using the INGRID on-axis near detector

Author: Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J. B., Andreopoulos, C., Andrieu, B., Anerella, M. D., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G. J., Barr, G., Bass, M., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blocki, J., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S. B., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Budd, H., Calvet, D., Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Collazuol, G., Coleman, W., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G. S., Davis, S., Day, M., De Rosa, G., de André, J. P. A. M., de Perio, P., Dealtry, T., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P. Dinh, Dobson, J., Dore, U., Drapier, O., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escallier, J. E., Escudero, L., Esposito, L. S., Fechner, M., Ferrero, A., Finch, A. J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Ganetis, G. L., Gannaway, F. C., Gaudin, A., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Ghosh, A. K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gomi, S., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Haesler, A., Haigh, M. D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N. C., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R. L., Henderson, R., Higashi, N., Hignight, J., Hillairet, A., Hirose, E., Holeczek, J., Horikawa, S., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G. V., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kawamuko, H., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J. Y., Kim, S. B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurimoto, Y., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laveder, M., Lee, K. P., Le, P. T., Levy, J. M., Licciardi, C., Lim, I. T., Lindner, T., Litchfield, R. P., Litos, M., Longhin, A., Lopez, G. D., Loverre, P. F., Ludovici, L., Lux, T., Macaire, M., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marone, A. J., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A. D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Muratore, J. F., Murdoch, M., Murphy, S., Myslik, J., Nagai, N., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Navin, M. L., Nelson, B., Nicholls, T. C., Nielsen, C., Nishikawa, K., Nishino, H., Nitta, K., Nobuhara, T., Nowak, J. A., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Perkin, J. D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ratoff, P. N., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roney, J. M., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sabouri, S., Sacco, R., Sakashita, K., Sánchez, F., Sarrat, A., Sasaki, K., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Siyad, M., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Stodulski, M., Strabel, C., Sulej, R., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Toki, W., Tobayama, S., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Walding, J. J., Waldron, A. V., Walter, C. W., Wanderer, P. J., Wang, J., Ward, M. A., Ward, G. P., Wark, D., Wascko, M. O., Weber, A., Wendell, R., West, N., Whitehead, L. H., Wikström, G., Wilkes, R. J., Wilking, M. J., Williamson, Z., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yamauchi, T., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Yuan, T., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: Physics - Instrumentation and Detectors
Abstract: Precise measurement of neutrino beam direction and intensity was achieved based on a new concept with modularized neutrino detectors. INGRID (Interactive Neutrino GRID) is an on-axis near detector for the T2K long baseline neutrino oscillation experiment. INGRID consists of 16 identical modules arranged in horizontal and vertical arrays around the beam center. The module has a sandwich structure of iron target plates and scintillator trackers. INGRID directly monitors the muon neutrino beam profile center and intensity using the number of observed neutrino events in each module. The neutrino beam direction is measured with accuracy better than 0.4 mrad from the measured profile center. The normalized event rate is measured with 4% precision., Comment: 32 pages, 27 figures, submitted to Nucl. Instr. and Meth. A
Published: 2011
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47. Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam

Author: T2K Collaboration, Abe, K., Abgrall, N., Ajima, Y., Aihara, H., Albert, J. B., Andreopoulos, C., Andrieu, B., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., Autiero, D., Badertscher, A., Barbi, M., Barker, G. J., Barr, G., Bass, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Blaszczyk, F. d. M., Blondel, A., Bojechko, C., Bouchez, J., Boyd, S. B., Bravar, A., Bronner, C., Brook-Roberge, D. G., Buchanan, N., Budd, H., Calvet, D., Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., Cazes, A., Cervera, A., Chavez, C., Choi, S., Christodoulou, G., Coleman, J., Coleman, W., Collazuol, G., Connolly, K., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G. S., Davis, S., Day, M., DeRosa, G., de Andre, J. P. A. M., dePerio, P., Delbart, A., Densham, C., DiLodovico, F., DiLuise, S., Tran, P. Dinh, Dobson, J., Dore, U., Drapier, O., Dufour, F., Dumarchez, J., Dytman, S., Dziewiecki, M., Dziomba, M., Emery, S., Ereditato, A., Escudero, L., Esposito, L. S., Fechner, M., Ferrero, A., Finch, A. J., Frank, E., Fujii, Y., Fukuda, Y., Galymov, V., Gannaway, F. C., Gaudin, A., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gonin, M., Grant, N., Grant, A., Gumplinger, P., Guzowski, P., Haesler, A., Haigh, M. D., Hamano, K., Hansen, C., Hansen, D., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasegawa, T., Hastings, N. C., Hastings, S., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Hearty, C., Helmer, R. L., Henderson, R., Higashi, N., Hignight, J., Hirose, E., Holeczek, J., Horikawa, S., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G. V., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kato, I., Kearns, E., Khabibullin, M., Khanam, F., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J., Kim, J. Y., Kim, S. B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kudenko, Y., Kulkarni, N., Kurjata, R., Kutter, T., Lagoda, J., Laihem, K., Laveder, M., Lee, K. P., Le, P. T., Levy, J. M., Licciardi, C., Lim, I. T., Lindner, T., Litchfield, R. P., Litos, M., Longhin, A., Lopez, G. D., Loverre, P. F., Ludovici, L., Lux, T., Macaire, M., Mahn, K., Makida, Y., Malek, M., Manly, S., Marchionni, A., Marino, A. D., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Missert, A. D., Mituka, G., Miura, M., Mizouchi, K., Monfregola, L., Moreau, F., Morgan, B., Moriyama, S., Muir, A., Murakami, A., Murdoch, M., Murphy, S., Myslik, J., Nakadaira, T., Nakahata, M., Nakai, T., Nakajima, K., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Navin, M. L., Nelson, B., Nicholls, T. C., Nishikawa, K., Nishino, H., Nowak, J. A., Noy, M., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Perkin, J. D., Pettinacci, V., Pierre, F., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ratoff, P. N., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Robert, A., Rodrigues, P. A., Rondio, E., Roney, J. M., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sabouri, S., Sacco, R., Sakashita, K., Sanchez, F., Sarrat, A., Sasaki, K., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Syiad, M., Smith, R. J., Smy, M., Sobczyk, J. T., Sobel, H., Sorel, M., Stahl, A., Stamoulis, P., Steinmann, J., Still, B., Stone, J., Strabel, C., Sulak, L. R., Sulej, R., Sutcliffe, P., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, K., Tanaka, H. A., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Toki, W., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Ueno, K., Vacheret, A., Vagins, M., Vasseur, G., Wachala, T., Walding, J. J., Waldron, A. V., Walter, C. W., Wanderer, P. J., Wang, J., Ward, M. A., Ward, G. P., Wark, D., Wascko, M. O., Weber, A., Wendell, R., West, N., Whitehead, L. H., Wikstrom, G., Wilkes, R. J., Wilking, M. J., Wilson, J. R., Wilson, R. J., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Zalewska, A., Zalipska, J., Zambelli, L., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: High Energy Physics - Experiment
Abstract: The T2K experiment observes indications of $\nu_\mu\rightarrow \nu_e$ appearance in data accumulated with $1.43\times10^{20}$ protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with $|\Delta m_{23}^2|=2.4\times10^{-3}$ eV$^2$, $\sin^2 2\theta_{23}=1$ and $\sin^2 2\theta_{13}=0$, the expected number of such events is 1.5$\pm$0.3(syst.). Under this hypothesis, the probability to observe six or more candidate events is 7$\times10^{-3}$, equivalent to 2.5$\sigma$ significance. At 90% C.L., the data are consistent with 0.03(0.04)$<\sin^2 2\theta_{13}<$ 0.28(0.34) for $\delta_{\rm CP}=0$ and a normal (inverted) hierarchy., Comment: 20 pages, 6 figures, version published in PRL
Published: 2011
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48. The T2K Experiment

Author: T2K Collaboration, Abe, K., Abgrall, N., Aihara, H., Ajima, Y., Albert, J. B., Allan, D., Amaudruz, P. -A., Andreopoulos, C., Andrieu, B., Anerella, M. D., Angelsen, C., Aoki, S., Araoka, O., Argyriades, J., Ariga, A., Ariga, T., Assylbekov, S., de André, J. P. A. M., Autiero, D., Badertscher, A., Ballester, O., Barbi, M., Barker, G. J., Baron, P., Barr, G., Bartoszek, L., Batkiewicz, M., Bay, F., Bentham, S., Berardi, V., Berger, B. E., Berns, H., Bertram, I., Besnier, M., Beucher, J., Beznosko, D., Bhadra, S., Birney, P., Bishop, D., Blackmore, E., Blaszczyk, F. d. M., Blocki, J., Blondel, A., Bodek, A., Bojechko, C., Bouchez, J., Boussuge, T., Boyd, S. B., Boyer, M., Braam, N., Bradford, R., Bravar, A., Briggs, K., Brinson, J. D., Bronner, C., Brook-Roberge, D. G., Bryant, M., Buchanan, N., Budd, H., Cadabeschi, M., Calland, R. G., Calvet, D., Rodríguez, J. Caravaca, Carroll, J., Cartwright, S. L., Carver, A., Castillo, R., Catanesi, M. G., Cavata, C., Cazes, A., Cervera, A., Charrier, J. P., Chavez, C., Choi, S., Chollet, S., Christodoulou, G., Colas, P., Coleman, J., Coleman, W., Collazuol, G., Connolly, K., Cooke, P., Curioni, A., Dabrowska, A., Danko, I., Das, R., Davies, G. S., Davis, S., Day, M., De La Broise, X., de Perio, P., De Rosa, G., Dealtry, T., Debraine, A., Delagnes, E., Delbart, A., Densham, C., Di Lodovico, F., Di Luise, S., Tran, P. Dinh, Dobson, J., Doornbos, J., Dore, U., Drapier, O., Druillole, F., Dufour, F., Dumarchez, J., Durkin, T., Dytman, S., Dziewiecki, M., Dziomba, M., Ellison, B., Emery, S., Ereditato, A., Escallier, J. E., Escudero, L., Esposito, L. S., Faszer, W., Fechner, M., Ferrero, A., Finch, A., Fisher, C., Fitton, M., Flight, R., Forbush, D., Frank, E., Fransham, K., Fujii, Y., Fukuda, Y., Gallop, M., Galymov, V., Ganetis, G. L., Gannaway, F. C., Gaudin, A., Gaweda, J., Gendotti, A., George, M., Giffin, S., Giganti, C., Gilje, K., Giomataris, I., Giraud, J., Ghosh, A. K., Golan, T., Goldhaber, M., Gomez-Cadenas, J. J., Gomi, S., Gonin, M., Goyette, M., Grant, A., Grant, N., Grañena, F., Greenwood, S., Gumplinger, P., Guzowski, P., Haigh, M. D., Hamano, K., Hansen, C., Hara, T., Harrison, P. F., Hartfiel, B., Hartz, M., Haruyama, T., Hasanen, R., Hasegawa, T., Hastings, N. C., Hastings, S., Hatzikoutelis, A., Hayashi, K., Hayato, Y., Haycock, T. D. J., Hearty, C., Helmer, R. L., Henderson, R., Herlant, S., Higashi, N., Hignight, J., Hiraide, K., Hirose, E., Holeczek, J., Honkanen, N., Horikawa, S., Hyndman, A., Ichikawa, A. K., Ieki, K., Ieva, M., Iida, M., Ikeda, M., Ilic, J., Imber, J., Ishida, T., Ishihara, C., Ishii, T., Ives, S. J., Iwasaki, M., Iyogi, K., Izmaylov, A., Jamieson, B., Johnson, R. A., Joo, K. K., Jover-Manas, G., Jung, C. K., Kaji, H., Kajita, T., Kakuno, H., Kameda, J., Kaneyuki, K., Karlen, D., Kasami, K., Kasey, V., Kato, I., Kawamuko, H., Kearns, E., Kellet, L., Khabibullin, M., Khaleeq, M., Khan, N., Khotjantsev, A., Kielczewska, D., Kikawa, T., Kim, J. Y., Kim, S. -B., Kimura, N., Kirby, B., Kisiel, J., Kitching, P., Kobayashi, T., Kogan, G., Koike, S., Komorowski, T., Konaka, A., Kormos, L. L., Korzenev, A., Koseki, K., Koshio, Y., Kouzuma, Y., Kowalik, K., Kravtsov, V., Kreslo, I., Kropp, W., Kubo, H., Kubota, J., Kudenko, Y., Kulkarni, N., Kurchaninov, L., Kurimoto, Y., Kurjata, R., Kurosawa, Y., Kutter, T., Lagoda, J., Laihem, K., Langstaff, R., Laveder, M., Lawson, T. B., Le, P. T., Coguie, A. Le, Ross, M. Le, Lee, K. P., Lenckowski, M., Licciardi, C., Lim, I. T., Lindner, T., Litchfield, R. P., Longhin, A., Lopez, G. D., Lu, P., Ludovici, L., Lux, T., Macaire, M., Magaletti, L., Mahn, K., Makida, Y., Malafis, C. J., Malek, M., Manly, S., Marchionni, A., Mark, C., Marino, A. D., Marone, A. J., Marteau, J., Martin, J. F., Maruyama, T., Maryon, T., Marzec, J., Masliah, P., Mathie, E. L., Matsumura, C., Matsuoka, K., Matveev, V., Mavrokoridis, K., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., McLachlan, T., Mercer, I., Messina, M., Metcalf, W., Metelko, C., Mezzetto, M., Mijakowski, P., Miller, C. A., Minamino, A., Mineev, O., Mine, S., Minvielle, R. E., Mituka, G., Miura, M., Mizouchi, K., Mols, J. -P., Monfregola, L., Monmarthe, E., Moreau, F., Morgan, B., Moriyama, S., Morris, D., Muir, A., Murakami, A., Muratore, J. F., Murdoch, M., Murphy, S., Myslik, J., Nagashima, G., Nakadaira, T., Nakahata, M., Nakamoto, T., Nakamura, K., Nakayama, S., Nakaya, T., Naples, D., Nelson, B., Nicholls, T. C., Nishikawa, K., Nishino, H., Nitta, K., Nizery, F., Nowak, J. A., Noy, M., Obayashi, Y., Ogitsu, T., Ohhata, H., Okamura, T., Okumura, K., Okusawa, T., Ohlmann, C., Olchanski, K., Openshaw, R., Oser, S. M., Otani, M., Owen, R. A., Oyama, Y., Ozaki, T., Pac, M. Y., Palladino, V., Paolone, V., Paul, P., Payne, D., Pearce, G. F., Pearson, C., Perkin, J. D., Pfleger, M., Pierre, F., Pierrepont, D., Plonski, P., Poffenberger, P., Poplawska, E., Popov, B., Posiadala, M., Poutissou, J. -M., Poutissou, R., Preece, R., Przewlocki, P., Qian, W., Raaf, J. L., Radicioni, E., Ramos, K., Ratoff, P., Raufer, T. M., Ravonel, M., Raymond, M., Retiere, F., Richards, D., Ritou, J. -L., Robert, A., Rodrigues, P. A., Rondio, E., Roney, M., Rooney, M., Ross, D., Rossi, B., Roth, S., Rubbia, A., Ruterbories, D., Sacco, R., Sadler, S., Sakashita, K., Sanchez, F., Sarrat, A., Sasaki, K., Schaack, P., Schmidt, J., Scholberg, K., Schwehr, J., Scott, M., Scully, D. I., Seiya, Y., Sekiguchi, T., Sekiya, H., Sheffer, G., Shibata, M., Shimizu, Y., Shiozawa, M., Short, S., Siyad, M., Smith, D., Smith, R. J., Smy, M., Sobczyk, J., Sobel, H., Sooriyakumaran, S., Sorel, M., Spitz, J., Stahl, A., Stamoulis, P., Star, O., Statter, J., Stawnyczy, L., Steinmann, J., Steffens, J., Still, B., Stodulski, M., Stone, J., Strabel, C., Strauss, T., Sulej, R., Sutcliffe, P., Suzuki, A., Suzuki, K., Suzuki, S., Suzuki, S. Y., Suzuki, Y., Swierblewski, J., Szeglowski, T., Szeptycka, M., Tacik, R., Tada, M., Tadepalli, A. S., Taguchi, M., Takahashi, S., Takeda, A., Takenaga, Y., Takeuchi, Y., Tanaka, H. A., Tanaka, K., Tanaka, M., Tanaka, M. M., Tanimoto, N., Tashiro, K., Taylor, I. J., Terashima, A., Terhorst, D., Terri, R., Thompson, L. F., Thorley, A., Thorpe, M., Toki, W., Tomaru, T., Totsuka, Y., Touramanis, C., Tsukamoto, T., Tvaskis, V., Tzanov, M., Uchida, Y., Ueno, K., Usseglio, M., Vacheret, A., Vagins, M., Van Schalkwyk, J. F., Vanel, J. -C., Vasseur, G., Veledar, O., Vincent, P., Wachala, T., Waldron, A. V., Walter, C. W., Wanderer, P. J., Ward, M. A., Ward, G. P., Wark, D., Warner, D., Wascko, M. O., Weber, A., Wendell, R., Wendland, J., West, N., Whitehead, L. H., Wikström, G., Wilkes, R. J., Wilking, M. J., Williamson, Z., Wilson, J. R., Wilson, R. J., Wong, K., Wongjirad, T., Yamada, S., Yamada, Y., Yamamoto, A., Yamamoto, K., Yamanoi, Y., Yamaoka, H., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M., Zalewska, A., Zalipska, J., Zaremba, K., Ziembicki, M., Zimmerman, E. D., Zito, M., and Zmuda, J.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: The T2K experiment is a long-baseline neutrino oscillation experiment. Its main goal is to measure the last unknown lepton sector mixing angle {\theta}_{13} by observing {\nu}_e appearance in a {\nu}_{\mu} beam. It also aims to make a precision measurement of the known oscillation parameters, {\Delta}m^{2}_{23} and sin^{2} 2{\theta}_{23}, via {\nu}_{\mu} disappearance studies. Other goals of the experiment include various neutrino cross section measurements and sterile neutrino searches. The experiment uses an intense proton beam generated by the J-PARC accelerator in Tokai, Japan, and is composed of a neutrino beamline, a near detector complex (ND280), and a far detector (Super-Kamiokande) located 295 km away from J-PARC. This paper provides a comprehensive review of the instrumentation aspect of the T2K experiment and a summary of the vital information for each subsystem., Comment: 33 pages, 32 figures, Submitted and accepted by NIM A. Editor: Prof. Chang Kee Jung, Department of Physics and Astronomy, SUNY Stony Brook, chang.jung@sunysb.edu, 631-632-8108 Submit Edited to remove line numbers
Published: 2011
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49. Measurement of the 8B Solar Neutrino Flux with the KamLAND Liquid Scintillator Detector

Author: KamLAND Collaboration, Abe, S., Furuno, K., Gando, A., Gando, Y., Ichimura, K., Ikeda, H., Inoue, K., Kibe, Y., Kimura, W., Kishimoto, Y., Koga, M., Minekawa, Y., Mitsui, T., Morikawa, T., Nagai, N., Nakajima, K., Nakamura, K., Nakamura, M., Narita, K., Shimizu, I., Shimizu, Y., Shirai, J., Suekane, F., Suzuki, A., Takahashi, H., Takahashi, N., Takemoto, Y., Tamae, K., Watanabe, H., Xu, B. D., Yabumoto, H., Yonezawa, E., Yoshida, H., Yoshida, S., Enomoto, S., Kozlov, A., Murayama, H., Grant, C., Keefer, G., McKee, D., Piepke, A., Banks, T. I., Bloxham, T., Detwiler, J. A., Freedman, S. J., Fujikawa, B. K., Han, K., Kadel, R., O'Donnell, T., Steiner, H. M., Winslow, L. A., Dwyer, D. A., Mauger, C., McKeown, R. D., Zhang, C., Berger, B. E., Lane, C. E., Maricic, J., Miletic, T., Batygov, M., Learned, J. G., Matsuno, S., Pakvasa, S., Sakai, M., Horton-Smith, G. A., Tang, A., Downum, K. E., Gratta, G., Tolich, K., Efremenko, Y., Kamyshkov, Y., Perevozchikov, O., Karwowski, H. J., Markoff, D. M., Tornow, W., Heeger, K. M., Piquemal, F., Ricol, J. -S., and Decowski, M. P.
Subjects: High Energy Physics - Experiment, Astrophysics - Solar and Stellar Astrophysics, Nuclear Experiment
Abstract: We report a measurement of the neutrino-electron elastic scattering rate from 8B solar neutrinos based on a 123 kton-day exposure of KamLAND. The background-subtracted electron recoil rate, above a 5.5 MeV analysis threshold is 1.49+/-0.14(stat)+/-0.17(syst) events per kton-day. Interpreted as due to a pure electron flavor flux with a 8B neutrino spectrum, this corresponds to a spectrum integrated flux of 2.77+/-0.26(stat)+/-0.32(syst) x 10^6 cm^-2s^-1. The analysis threshold is driven by 208Tl present in the liquid scintillator, and the main source of systematic uncertainty is due to background from cosmogenic 11Be. The measured rate is consistent with existing measurements and with Standard Solar Model predictions which include matter enhanced neutrino oscillation., Comment: 6 pages, 3 figures
Published: 2011
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50. Enhanced Constraints on theta13 from A Three-Flavor Oscillation Analysis of Reactor Antineutrinos at KamLAND

Author: Gando, A., Gando, Y., Ichimura, K., Ikeda, H., Inoue, K., Kibe, Y., Kishimoto, Y., Koga, M., Minekawa, Y., Mitsui, T., Morikawa, T., Nagai, N., Nakajima, K., Nakamura, K., Narita, K., Shimizu, I., Shimizu, Y., Shirai, J., Suekane, F., Suzuki, A., Takahashi, H., Takahashi, N., Takemoto, Y., Tamae, K., Watanabe, H., Xu, B. D., Yabumoto, H., Yoshida, H., Yoshida, S., Enomoto, S., Kozlov, A., Murayama, H., Grant, C., Keefer, G., Piepke, A., Banks, T. I., Bloxham, T., Detwiler, J. A., Freedman, S. J., Fujikawa, B. K., Han, K., Kadel, R., O'Donnell, T., Steiner, H. M., Dwyer, D. A., McKeown, R. D., Zhang, C., Berger, B. E., Lane, C. E., Maricic, J., Miletic, T., Batygov, M., Learned, J. G., Matsuno, S., Sakai, M., Horton-Smith, G. A., Downum, K. E., Gratta, G., Efremenko, Y., Perevozchikov, O., Karwowski, H. J., Markoff, D. M., Tornow, W., Heeger, K. M., and Decowski, M. P.
Published: 2011

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