Hlavná stránka > Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations |
Article | |
Report number | arXiv:1910.03887 |
Title | Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations |
Related title | Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations |
Author(s) |
Abe, K. ; Akutsu, R. (Tokyo U., ICRR) ; Ali, A. (Kyoto U.) ; Alt, C. (Zurich, ETH) ; Andreopoulos, C. (Rutherford ; Liverpool U.) ; Anthony, L. (Liverpool U.) ; Antonova, M. (Valencia U., IFIC) ; Aoki, S. (Kobe U.) ; Ariga, A. (U. Bern, AEC) ; Asada, Y. (Yokohama Natl. U.) ; Ashida, Y. (Kyoto U.) ; Atkin, E.T. (Imperial Coll., London) ; Awataguchi, Y. (Tokyo Metropolitan U.) ; Ban, S. (Kyoto U.) ; Barbi, M. (Regina U.) ; Barker, G.J. (Warwick U.) ; Barr, G. (Oxford U.) ; Barry, C. (Liverpool U.) ; Batkiewicz-Kwasniak, M. (Cracow, INP) ; Beloshapkin, A. (Moscow, INR) ; Bench, F. (Liverpool U.) ; Berardi, V. (Bari Polytechnic ; INFN, Bari) ; Berkman, S. (British Columbia U. ; TRIUMF) ; Berns, L. (Tokyo Inst. Tech.) ; Bhadra, S. (York U., Canada) ; Bienstock, S. (Paris U., VI-VII) ; Blondel, A. (Geneva U.) ; Bolognesi, S. (IRFU, SPhN, Saclay) ; Bourguille, B. (Barcelona, IFAE) ; Boyd, S.B. (Warwick U.) ; Brailsford, D. (Lancaster U.) ; Bravar, A. (Geneva U.) ; Bravo Berguño, D. (Madrid, Autonoma U.) ; Bronner, C. (Kamioka Observ.) ; Bubak, A. (Silesia U.) ; Buizza Avanzini, M. (Ecole Polytechnique) ; Calcutt, J. (Michigan State U.) ; Campbell, T. (Colorado U.) ; Cao, S. (KEK, Tsukuba) ; Cartwright, S.L. (Sheffield U.) ; Catanesi, M.G. (Bari Polytechnic ; INFN, Bari) ; Cervera, A. (Valencia U., IFIC) ; Chappell, A. (Warwick U.) ; Checchia, C. (INFN, Padua ; Padua U.) ; Cherdack, D. (Houston U.) ; Chikuma, N. (Tokyo U.) ; Christodoulou, G. (CERN) ; Coleman, J. (Liverpool U.) ; Collazuol, G. (INFN, Padua ; Padua U.) ; Cook, L. (Oxford U. ; Tokyo U., IPMU) ; Coplowe, D. (Oxford U.) ; Cudd, A. (Michigan State U.) ; Dabrowska, A. (Cracow, INP) ; De Rosa, G. (INFN, Naples ; Naples U.) ; Dealtry, T. (Lancaster U.) ; Denner, P.F. (Warwick U.) ; Dennis, S.R. (Liverpool U.) ; Densham, C. (Rutherford) ; Di Lodovico, F. (King's Coll. London) ; Dokania, N. (SUNY, Stony Brook) ; Dolan, S. (CERN) ; Drapier, O. (Ecole Polytechnique) ; Dumarchez, J. (Paris U., VI-VII) ; Dunne, P. (Imperial Coll., London) ; Eklund, L. (Glasgow U.) ; Emery-Schrenk, S. (IRFU, SPhN, Saclay) ; Ereditato, A. (U. Bern, AEC) ; Fernandez, P. (Valencia U., IFIC) ; Feusels, T. (British Columbia U. ; TRIUMF) ; Finch, A.J. (Lancaster U.) ; Fiorentini, G.A. (York U., Canada) ; Fiorillo, G. (INFN, Naples ; Naples U.) ; Francois, C. (U. Bern, AEC) ; Friend, M. (JAEA, Ibaraki ; KEK, Tsukuba) ; Fujii, Y. (JAEA, Ibaraki ; KEK, Tsukuba) ; Fujita, R. (Tokyo U.) ; Fukuda, D. (Okayama U.) ; Fukuda, R. (Tokyo U. of Sci., Noda Campus) ; Fukuda, Y. (Miyagi U. of Education) ; Gameil, K. (British Columbia U. ; TRIUMF) ; Giganti, C. (Paris U., VI-VII) ; Golan, T. (Wroclaw U.) ; Gonin, M. (Ecole Polytechnique) ; Gorin, A. (Moscow, INR) ; Guigue, M. (Paris U., VI-VII) ; Hadley, D.R. (Warwick U.) ; Haigh, J.T. (Warwick U.) ; Hamacher-Baumann, P. (Aachen, Tech. Hochsch.) ; Hartz, M. (TRIUMF ; Tokyo U., IPMU) ; Hasegawa, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Hastings, N.C. (KEK, Tsukuba) ; Hayashino, T. (Kyoto U.) ; Hayato, Y. (Kamioka Observ. ; Tokyo U., IPMU) ; Hiramoto, A. (Kyoto U.) ; Hogan, M. (Colorado State U.) ; Holeczek, J. (Silesia U.) ; Hong Van, N.T. (IFIRSE, Quy Nhon ; Hanoi, Inst. Phys.) ; Iacob, F. (INFN, Padua ; Padua U.) ; Ichikawa, A.K. (Kyoto U.) ; Ikeda, M. (Kamioka Observ.) ; Ishida, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Ishii, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Ishitsuka, M. (Tokyo U. of Sci., Noda Campus) ; Iwamoto, K. (Tokyo U.) ; Izmaylov, A. (Valencia U., IFIC ; Moscow, INR) ; Jamieson, B. (Winnipeg U.) ; Jenkins, S.J. (Sheffield U.) ; Jesús-Valls, C. (Barcelona, IFAE) ; Jiang, M. (Kyoto U.) ; Johnson, S. (Colorado U.) ; Jonsson, P. (Imperial Coll., London) ; Jung, C.K. (Tokyo U., IPMU ; SUNY, Stony Brook) ; Kabirnezhad, M. (Oxford U.) ; Kaboth, A.C. (Royal Holloway, U. of London ; Rutherford) ; Kajita, T. (Tokyo U., IPMU ; Tokyo U., ICRR) ; Kakuno, H. (Tokyo Metropolitan U.) ; Kameda, J. (Kamioka Observ.) ; Karlen, D. (Victoria U. ; TRIUMF) ; Kasetti, S.P. (Louisiana State U.) ; Kataoka, Y. (Kamioka Observ.) ; Katori, T. (King's Coll. London) ; Kato, Y. (Kamioka Observ.) ; Kearns, E. (Tokyo U., IPMU ; Boston U.) ; Khabibullin, M. (Moscow, INR) ; Khotjantsev, A. (Moscow, INR) ; Kikawa, T. (Kyoto U.) ; Kim, H. (Osaka City U.) ; Kim, J. (British Columbia U. ; TRIUMF) ; King, S. (Queen Mary, U. of London) ; Kisiel, J. (Silesia U.) ; Knight, A. (Warwick U.) ; Knox, A. (Lancaster U.) ; Kobayashi, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Koch, L. (Rutherford) ; Koga, T. (Tokyo U.) ; Konaka, A. (TRIUMF) ; Kormos, L.L. (Lancaster U.) ; Koshio, Y. (Tokyo U., IPMU ; Okayama U.) ; Kowalik, K. (NCBJ, Swierk) ; Kubo, H. (Kyoto U.) ; Kudenko, Y. (Moscow, MIPT ; Moscow Phys. Eng. Inst. ; Moscow, INR) ; Kukita, N. (Osaka City U.) ; Kuribayashi, S. (Kyoto U.) ; Kurjata, R. (Warsaw U. of Tech.) ; Kutter, T. (Louisiana State U.) ; Kuze, M. (Tokyo Inst. Tech.) ; Labarga, L. (Madrid, Autonoma U.) ; Lagoda, J. (NCBJ, Swierk) ; Lamoureux, M. (INFN, Padua ; Padua U.) ; Laveder, M. (INFN, Padua ; Padua U.) ; Lawe, M. (Lancaster U.) ; Licciardi, M. (Ecole Polytechnique) ; Lindner, T. (TRIUMF) ; Litchfield, R.P. (Glasgow U.) ; Liu, S.L. (SUNY, Stony Brook) ; Li, X. (SUNY, Stony Brook) ; Longhin, A. (INFN, Padua ; Padua U.) ; Ludovici, L. (INFN, Rome ; Rome U.) ; Lu, X. (Oxford U.) ; Lux, T. (Barcelona, IFAE) ; Machado, L.N. (INFN, Naples ; Naples U.) ; Magaletti, L. (Bari Polytechnic ; INFN, Bari) ; Mahn, K. (Michigan State U.) ; Malek, M. (Sheffield U.) ; Manly, S. (Rochester U.) ; Maret, L. (Geneva U.) ; Marino, A.D. (Colorado U.) ; Martin, J.F. (Toronto U.) ; Maruyama, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Matsubara, T. (KEK, Tsukuba) ; Matsushita, K. (Tokyo U.) ; Matveev, V. (Moscow, INR) ; Mavrokoridis, K. (Liverpool U.) ; Mazzucato, E. (IRFU, SPhN, Saclay) ; McCarthy, M. (York U., Canada) ; McCauley, N. (Liverpool U.) ; McFarland, K.S. (Rochester U.) ; McGrew, C. (SUNY, Stony Brook) ; Mefodiev, A. (Moscow, INR) ; Metelko, C. (Liverpool U.) ; Mezzetto, M. (INFN, Padua ; Padua U.) ; Minamino, A. (Yokohama Natl. U.) ; Mineev, O. (Moscow, INR) ; Mine, S. (UC, Irvine) ; Miura, M. (Tokyo U., IPMU ; Kamioka Observ.) ; Molina Bueno, L. (Zurich, ETH) ; Moriyama, S. (Tokyo U., IPMU ; Kamioka Observ.) ; Morrison, J. (Michigan State U.) ; Mueller, Th.A. (Ecole Polytechnique) ; Munteanu, L. (IRFU, SPhN, Saclay) ; Murphy, S. (Zurich, ETH) ; Nagai, Y. (Colorado U.) ; Nakadaira, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Nakahata, M. (Kamioka Observ. ; Tokyo U., IPMU) ; Nakajima, Y. (Kamioka Observ.) ; Nakamura, A. (Okayama U.) ; Nakamura, K.G. (Kyoto U.) ; Nakamura, K. (JAEA, Ibaraki ; Tokyo U., IPMU ; KEK, Tsukuba) ; Nakayama, S. (Kamioka Observ. ; Tokyo U., IPMU) ; Nakaya, T. (Kyoto U. ; Tokyo U., IPMU) ; Nakayoshi, K. (JAEA, Ibaraki ; KEK, Tsukuba) ; Nantais, C. (Toronto U.) ; Ngoc, T.V. (GUST, Hanoi ; IFIRSE, Quy Nhon) ; Niewczas, K. (Wroclaw U.) ; Nishikawa, K. (KEK, Tsukuba) ; Nishimura, Y. (Keio U.) ; Nonnenmacher, T.S. (Imperial Coll., London) ; Nova, F. (Rutherford) ; Novella, P. (Valencia U., IFIC) ; Nowak, J. (Lancaster U.) ; Nugent, J.C. (Glasgow U.) ; O'Keeffe, H.M. (Lancaster U.) ; O'Sullivan, L. (Sheffield U.) ; Odagawa, T. (Kyoto U.) ; Okumura, K. (Tokyo U., ICRR ; Tokyo U., IPMU) ; Okusawa, T. (Osaka City U.) ; Oser, S.M. (British Columbia U. ; TRIUMF) ; Owen, R.A. (Queen Mary, U. of London) ; Oyama, Y. (JAEA, Ibaraki ; KEK, Tsukuba) ; Palladino, V. (INFN, Naples ; Naples U.) ; Palomino, J.L. (SUNY, Stony Brook) ; Paolone, V. (Pittsburgh U.) ; Parker, W.C. (Royal Holloway, U. of London) ; Paudyal, P. (Liverpool U.) ; Pavin, M. (TRIUMF) ; Payne, D. (Liverpool U.) ; Penn, G.C. (Liverpool U.) ; Pickering, L. (Michigan State U.) ; Pidcott, C. (Sheffield U.) ; Pintaudi, G. (Yokohama Natl. U.) ; Pinzon Guerra, E.S. (York U., Canada) ; Pistillo, C. (U. Bern, AEC) ; Popov, B. (Dubna, JINR ; Paris U., VI-VII) ; Porwit, K. (Silesia U.) ; Posiadala-Zezula, M. (Warsaw U.) ; Pritchard, A. (Liverpool U.) ; Quilain, B. (Tokyo U., IPMU) ; Radermacher, T. (Aachen, Tech. Hochsch.) ; Radicioni, E. (Bari Polytechnic ; INFN, Bari) ; Radics, B. (Zurich, ETH) ; Ratoff, P.N. (Lancaster U.) ; Reinherz-Aronis, E. (Colorado State U.) ; Riccio, C. (INFN, Naples ; Naples U.) ; Rondio, E. (NCBJ, Swierk) ; Roth, S. (Aachen, Tech. Hochsch.) ; Rubbia, A. (Zurich, ETH) ; Ruggeri, A.C. (INFN, Naples ; Naples U.) ; Rychter, A. (Warsaw U. of Tech.) ; Sakashita, K. (JAEA, Ibaraki ; KEK, Tsukuba) ; Sánchez, F. (Geneva U.) ; Schloesser, C.M. (Zurich, ETH) ; Scholberg, K. (Tokyo U., IPMU ; Duke U.) ; Schwehr, J. (Colorado State U.) ; Scott, M. (Imperial Coll., London) ; Seiya, Y. (Dubna, JINR ; Osaka City U.) ; Sekiguchi, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Sekiya, H. (Tokyo U., IPMU ; Kamioka Observ.) ; Sgalaberna, D. (CERN) ; Shah, R. (Rutherford ; Oxford U.) ; Shaikhiev, A. (Moscow, INR) ; Shaker, F. (Winnipeg U.) ; Shaykina, A. (Moscow, INR) ; Shiozawa, M. (Kamioka Observ. ; Tokyo U., IPMU) ; Shorrock, W. (Imperial Coll., London) ; Shvartsman, A. (Moscow, INR) ; Smirnov, A. (Moscow, INR) ; Smy, M. (UC, Irvine) ; Sobczyk, J.T. (Wroclaw U.) ; Sobel, H. (UC, Irvine ; Tokyo U., IPMU) ; Soler, F.J.P. (Glasgow U.) ; Sonoda, Y. (Kamioka Observ.) ; Steinmann, J. (Aachen, Tech. Hochsch.) ; Suvorov, S. (Moscow, INR ; IRFU, SPhN, Saclay) ; Suzuki, A. (Kobe U.) ; Suzuki, S.Y. (JAEA, Ibaraki ; KEK, Tsukuba) ; Suzuki, Y. (Tokyo U., IPMU) ; Sztuc, A.A. (Imperial Coll., London) ; Tada, M. (JAEA, Ibaraki ; KEK, Tsukuba) ; Tajima, M. (Kyoto U.) ; Takeda, A. (Kamioka Observ.) ; Takeuchi, Y. (Kobe U. ; Tokyo U., IPMU) ; Tanaka, H.K. (Tokyo U., IPMU ; Kamioka Observ.) ; Tanaka, H.A. (SLAC ; Toronto U.) ; Tanaka, S. (Osaka City U.) ; Thompson, L.F. (Sheffield U.) ; Toki, W. (Colorado State U.) ; Touramanis, C. (Liverpool U.) ; Tsui, K.M. (Liverpool U.) ; Tsukamoto, T. (JAEA, Ibaraki ; KEK, Tsukuba) ; Tzanov, M. (Louisiana State U.) ; Uchida, Y. (Imperial Coll., London) ; Uno, W. (Kyoto U.) ; Vagins, M. (Tokyo U., IPMU ; UC, Irvine) ; Valder, S. (Warwick U.) ; Vallari, Z. (SUNY, Stony Brook) ; Vargas, D. (Barcelona, IFAE) ; Vasseur, G. (IRFU, SPhN, Saclay) ; Vilela, C. (SUNY, Stony Brook) ; Vinning, W.G.S. (Warwick U.) ; Vladisavljevic, T. (Oxford U. ; Tokyo U., IPMU) ; Volkov, V.V. (Moscow, INR) ; Wachala, T. (Cracow, INP) ; Walker, J. (Winnipeg U.) ; Walsh, J.G. (Lancaster U.) ; Wang, Y. (SUNY, Stony Brook) ; Wark, D. (Rutherford ; Oxford U.) ; Wascko, M.O. (Imperial Coll., London) ; Weber, A. (Rutherford ; Oxford U.) ; Wendell, R. (Tokyo U., IPMU ; Kyoto U.) ; Wilking, M.J. (SUNY, Stony Brook) ; Wilkinson, C. (U. Bern, AEC) ; Wilson, J.R. (King's Coll. London) ; Wilson, R.J. (Colorado State U.) ; Wood, K. (SUNY, Stony Brook) ; Wret, C. (Rochester U.) ; Yamada, Y. (KEK, Tsukuba) ; Yamamoto, K. (Dubna, JINR ; Osaka City U.) ; Yanagisawa, C. (BMCC, New York ; SUNY, Stony Brook) ; Yang, G. (SUNY, Stony Brook) ; Yano, T. (Kamioka Observ.) ; Yasutome, K. (Kyoto U.) ; Yen, S. (TRIUMF) ; Yershov, N. (Moscow, INR) ; Yokoyama, M. (Tokyo U., IPMU ; Tokyo U.) ; Yoshida, T. (Tokyo Inst. Tech.) ; Yu, M. (York U., Canada) ; Zalewska, A. (Cracow, INP) ; Zalipska, J. (NCBJ, Swierk) ; Zaremba, K. (Warsaw U. of Tech.) ; Zarnecki, G. (NCBJ, Swierk) ; Ziembicki, M. (Warsaw U. of Tech.) ; Zimmerman, E.D. (Colorado U.) ; Zito, M. (IRFU, SPhN, Saclay) ; Zsoldos, S. (Queen Mary, U. of London) ; Zykova, A. (Moscow, INR) |
Publication | 2020-06-18 |
Imprint | 2019-10-09 |
Number of pages | 10 |
In: | Nature 580 (2020) pp.339-344 |
DOI | 10.1038/s41586-020-2177-0 10.1038/s41586-020-2415-5 |
Subject category | hep-ex ; Particle Physics - Experiment |
Accelerator/Facility, Experiment | T2K |
Abstract | The current laws of physics do not explain the observed imbalance of matter and antimatter in the universe. Sakharov proposed that an explanation would require the violation of CP symmetry between matter and antimatter. The only CP violation observed so far is in the weak interactions of quarks, and it is too small to explain the matter-antimatter imbalance of the universe. It has been shown that CP violation in the lepton sector could generate the matter-antimatter disparity through the process called leptogenesis. The quantum mixing of neutrinos, the neutral leptons in the Standard Model, provides a potential source of CP violation through a complex phase dCP, which may have consequences for theoretical models of leptogenesis. This CP violation can be measured in muon neutrino to electron neutrino oscillations and the corresponding antineutrino oscillations, which are experimentally accessible with accelerator-produced beams as established by the T2K experiment. Until now, the value of dCP has not been significantly constrained by neutrino oscillation experiments. Here the T2K collaboration reports a measurement that favors large enhancement of the neutrino oscillation probability, excluding values of dCP which result in a large enhancement of the observed anti-neutrino oscillation probability at three standard deviations (3 sigma). The 3 sigma confidence level interval for dCP, which is cyclic and repeats every 2pi, is [-3.41,-0.03] for the so-called normal mass ordering, and [-2.54,-0.32] for the inverted mass ordering. Our results show an indication of CP violation in the lepton sector. Herein we establish methods for sensitive searches for matter-antimatter asymmetry in neutrino oscillations using accelerator-produced neutrino beams. Future measurements with larger data samples will determine whether the leptonic CP violation is larger than the quark sector CP violation. |
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