A Measurement of the Tau Neutrino Cross Section in Atmospheric Neutrino Oscillations with Super-Kamiokande

Super-Kamiokande Collaboration: Z. Li , K. Abe , C. Bronner , Y. Hayato , M. Ikeda , K. Iyogi , J. Kameda , Y. Kato

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Y. Kishimoto Ll. Marti M. Miura S. Moriyama M. Nakahata Y. Nakajima Y. Nakano S. Nakayama A. Orii G. Pronost H. Sekiya M. Shiozawa Y. Sonoda A. Takeda A. Takenaka H. Tanaka S. Tasaka T. Tomura R. Akutsu T. Kajita Y. Nishimura K. Okumura K. M. Tsui P. Fernandez L. Labarga F. d. M. Blaszczyk J. Gustafson C. Kachulis E. Kearns J. L. Raaf J. L. Stone L. R. Sulak S. Berkman S. Tobayama M. Elnimr W. R. Kropp S. Locke S. Mine P. Weatherly M. B. Smy H. W. Sobel V. Takhistov K. S. Ganezer J. Hill J. Y. Kim I. T. Lim R. G. Park A. Himmel E. O'Sullivan K. Scholberg C. W. Walter T. Ishizuka T. Nakamura J. S. Jang K. Choi J. G. Learned S. Matsuno S. N. Smith J. Amey R. P. Litchfield W. Y. Ma Y. Uchida M. O. Wascko S. Cao M. Friend T. Hasegawa T. Ishida T. Ishii T. Kobayashi T. Nakadaira K. Nakamura Y. Oyama K. Sakashita T. Sekiguchi T. Tsukamoto KE. Abe M. Hasegawa A. T. Suzuki Y. Takeuchi T. Yano T. Hayashino T. Hiraki S. Hirota K. Huang M. Jiang M. Mori KE. Nakamura T. Nakaya N. D. Patel R. A. Wendell L. H. V. Anthony N. McCauley A. Pritchard Y. Fukuda Y. Itow M. Murase F. Muto P. Mijakowski K. Frankiewicz C. K. Jung X. Li J. L. Palomino G. Santucci C. Vilela M. J. Wilking C. Yanagisawa G. Yang S. Ito D. Fukuda H. Ishino A. Kibayashi Y. Koshio H. Nagata M. Sakuda C. Xu Y. Kuno D. Wark F. Di Lodovico B. Richards S. M. Sedgwick R. Tacik S. B. Kim A. Cole L. Thompson H. Okazawa Y. Choi K. Ito K. Nishijima M. Koshiba Y. Suda M. Yokoyama R. G. Calland M. Hartz K. Martens M. Murdoch B. Quilain C. Simpson Y. Suzuki M. R. Vagins D. Hamabe M. Kuze Y. Okajima T. Yoshida M. Ishitsuka J. F. Martin C. M. Nantais H. A. Tanaka T. Towstego A. Konaka S. Chen L. Wan Y. Zhang A. Minamino R. J. Wilkes

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classification ✦ hep-ex

keywords neutrinosuper-kamiokandeatmosphericcrossmeasurementsectionsigmaagreeing

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Using 5,326 days of atmospheric neutrino data, a search for atmospheric tau neutrino appearance has been performed in the Super-Kamiokande experiment. Super-Kamiokande measures the tau normalization to be 1.47$\pm$0.32 under the assumption of normal neutrino hierarchy, relative to the expectation of unity with neutrino oscillation. The result excludes the hypothesis of no-tau-appearance with a significance level of 4.6$\sigma$. The inclusive charged-current tau neutrino cross section averaged by the tau neutrino flux at Super-Kamiokande is measured to be $(0.94\pm0.20)\times 10^{-38}$ cm$^{2}$. The measurement is consistent with the Standard Model prediction, agreeing to within 1.5$\sigma$.

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A Measurement of the Tau Neutrino Cross Section in Atmospheric Neutrino Oscillations with Super-Kamiokande

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