Search for Neutrinos from Annihilation of Captured Low-Mass Dark Matter Particles in the Sun by Super-Kamiokande
K. Choi(Nagoya University), K. Abe(The University of Tokyo), Y. Haga(The University of Tokyo), Y. Hayato(The University of Tokyo), K. Iyogi(The University of Tokyo), J. Kameda(Kavli Institute for the Physics and Mathematics of the Universe), Y. Kishimoto(The University of Tokyo), M. Miura(The University of Tokyo), S. Moriyama(The University of Tokyo), M. Nakahata(Kavli Institute for the Physics and Mathematics of the Universe), Y. Nakano(The University of Tokyo), S. Nakayama(The University of Tokyo), H. Sekiya(Kavli Institute for the Physics and Mathematics of the Universe), M. Shiozawa(The University of Tokyo), Y. Suzuki(The University of Tokyo), A. Takeda(Kavli Institute for the Physics and Mathematics of the Universe), T. Tomura(The University of Tokyo), R. A. Wendell(Kavli Institute for the Physics and Mathematics of the Universe), T. J. Irvine(Institute for Cosmic Ray Research), T. Kajita(Kavli Institute for the Physics and Mathematics of the Universe), I. Kametani(The University of Tokyo), K. Kaneyuki(Kavli Institute for the Physics and Mathematics of the Universe), K. P. Lee(Institute for Cosmic Ray Research), Y. Nishimura(The University of Tokyo), K. Okumura(Institute for Cosmic Ray Research), T. C. Mclachlan(The University of Tokyo), L. Labarga(Universidad Autónoma de Madrid), E. Kearns(Kavli Institute for the Physics and Mathematics of the Universe), J. L. Raaf(Boston University), J. L. Stone(Kavli Institute for the Physics and Mathematics of the Universe), L. Sulak(Boston University), S. Berkman(University of British Columbia), H. A. Tanaka(University of British Columbia), S. Tobayama(University of British Columbia), M. Goldhaber(Brookhaven National Laboratory), G. Carminati(University of California, Irvine), W. R. Kropp(University of California, Irvine), S. Mine(University of California, Irvine), A. Renshaw(University of California, Irvine), M. Smy(The University of Tokyo), H. W. Sobel(The University of Tokyo), K. S. Ganezer(California State University, Dominguez Hills), J. Hill(California State University, Dominguez Hills), Nguyễn Thị Hồng(Chonnam National University), J. Y. Kim(Chonnam National University), I. T. Lim(Chonnam National University), T. Akiri(Duke University), A. Himmel(Duke University), K. Scholberg(Duke University), C. W. Walter(Kavli Institute for the Physics and Mathematics of the Universe), T. Wongjirad(Duke University), T. Ishizuka(Fukuoka Institute of Technology Junior College), S. Tasaka(Gifu University), J. S. Jang(Gwangju Institute of Science and Technology), J. G. Learned(University of Hawaii System), S. Matsuno(University of Hawaii System), S. N. Smith(University of Hawaii System), T. Hasegawa(High Energy Accelerator Research Organization), Toru Ishida(High Energy Accelerator Research Organization), T. Ishii(High Energy Accelerator Research Organization), T. Kobayashi(High Energy Accelerator Research Organization), T. Nakadaira(High Energy Accelerator Research Organization), K. Nakamura(High Energy Accelerator Research Organization), Y. Oyama(High Energy Accelerator Research Organization), K. Sakashita(High Energy Accelerator Research Organization), T. Sekiguchi(High Energy Accelerator Research Organization), T. Tsukamoto(High Energy Accelerator Research Organization), Y. Suzuki(Kobe University), Y. Takeuchi(Kobe University), C. Bronner(Kyoto University), S. Hirota(Kyoto University), K. Huang(Kyoto University), K. Ieki(Kyoto University), M. Ikeda(Kyoto University), T. Kikawa(Kyoto University), A. Minamino(Kyoto University), T. Nakaya(Kavli Institute for the Physics and Mathematics of the Universe), K. Suzuki(Kyoto University), Sentaro Takahashi(Kyoto University), Y. Fukuda(Miyagi University of Education), Y. Itow(Nagoya University), G. Mitsuka(Nagoya University), P. Mijakowski(National Centre for Nuclear Research), J. Hignight(State University of New York), J. Imber(State University of New York), C. K. Jung(Stony Brook University), C. Yanagisawa(Stony Brook University), H. Ishino(Okayama University of Science), A. Kibayashi(Okayama University of Science), Y. Koshio(Okayama University of Science), T. Mori(Okayama University of Science), M. Sakuda(Okayama University of Science), T. Yano(Okayama University of Science), Y. Kuno(The University of Osaka), R. Tacik(University of Regina), S. B. Kim(Seoul National University), H. Okazawa(Shizuoka University of Welfare), Y. Choi(Sungkyunkwan University), K. Nishijima(Tokai University), M. Koshiba(Bunkyo University), Y. Totsuka(The University of Tokyo), M. Yokoyama(Kavli Institute for the Physics and Mathematics of the Universe), K. Martens(The University of Tokyo), Ll. Marti(The University of Tokyo), M. R. Vagins(University of California, Irvine), J. F. Martin(University of Toronto), P. de Perio(University of Toronto), A. Konaka(TRIUMF), M. J. Wilking(TRIUMF), S. Chen(Tsinghua University), Y. Zhang(Tsinghua University), R. J. Wilkes(University of Washington)
Cited by 253Open Access
Abstract
Super-Kamiokande (SK) can search for weakly interacting massive particles (WIMPs) by detecting neutrinos produced from WIMP annihilations occurring inside the Sun. In this analysis, we include neutrino events with interaction vertices in the detector in addition to upward-going muons produced in the surrounding rock. Compared to the previous result, which used the upward-going muons only, the signal acceptances for light (few-GeV/c^{2}-200-GeV/c^{2}) WIMPs are significantly increased. We fit 3903 days of SK data to search for the contribution of neutrinos from WIMP annihilation in the Sun. We found no significant excess over expected atmospheric-neutrino background and the result is interpreted in terms of upper limits on WIMP-nucleon elastic scattering cross sections under different assumptions about the annihilation channel. We set the current best limits on the spin-dependent WIMP-proton cross section for WIMP masses below 200 GeV/c^{2} (at 10 GeV/c^{2}, 1.49×10^{-39} cm^{2} for χχ→bb[over ¯] and 1.31×10^{-40} cm^{2} for χχ→τ^{+}τ^{-} annihilation channels), also ruling out some fraction of WIMP candidates with spin-independent coupling in the few-GeV/c^{2} mass range.
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