Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam

Abe, K.; Akutsu, R.; Ali, Ahmed Farag; Alt, C.; Andreopoulos, C.; Anthony, L. H. V.; Antonova, M.; Aoki, Shigeki; Ariga, A.; Asada, Y.; Ashida, Yosuke; Atkin, E. T.; Awataguchi, Y.; Ban, S.; Barbi, M.; Barker, G. J.; Barr, G.; Barrow, D.; Barry, C.; Batkiewicz-Kwasniak, M.; Beloshapkin, A.; Bench, F.; Berardi, V.; Berkman, S.; Berns, L.; Bhadra, S.; Bienstock, S.; Blondel, A.; Bolognesi, S.; Bourguille, B.; Boyd, S. B.; Brailsford, D.; Bravar, A.; Bravo-Berguño, D.; Bronner, C.; Bubak, A.; Avanzini, M. Buizza; Calcutt, J.; Campbell, T.; Cao, S.; Cartwright, S. L.; Catanesi, M. G.; Cervera, A.; Chappell, A.; Checchia, C.; Cherdack, D.; Chikuma, N.; Christodoulou, G.; Coleman, J. P.; Collazuol, G.; Cook, L.; Coplowe, D.; Cudd, A.; Dąbrowska, A.; Rosa, G.; Dealtry, T.; Denner, P. F.; Dennis, S. R.; Densham, C.; Lodovico, F. Di; Dokania, N.; Dolan, S.; Doyle, Tony; Drapier, O.; Dumarchez, J.; Dunne, P.; Eklund, L.; Emery-Schrenk, S.; Ereditato, A.; Fernández, P.; Feusels, T.; Finch, A. J.; Fiorentini, G. A.; Fiorillo, G.; François, C.; Friend, M.; Fujii, Y.; Fujita, Ryuichi; Fukuda, Daisuke; Fukuda, R.; Fukuda, Y.; Fusshoeller, K.; Gameil, K.; Giganti, C.; Golan, T.; Gonin, M.; Gorin, A.; Guigue, M.; Hadley, D. R.; Haigh, J. T.; Hamacher-Baumann, P.; Hartz, M.; Hasegawa, T.; Hastings, N. C.; Hayashino, T.; Hayato, Y.; Hiramoto, A.; Hogan, M.; Holeczek, J.; Van, N. T. Hong; Iacob, F.; Ichikawa, A. K.; Ikeda, M.; Ishida, Toru; Ishii, T.; Ishitsuka, M.; Iwamoto, K.; Izmaylov, A.; Jakkapu, M.; Jamieson, B.; Jenkins, S. J.; Jesús-Valls, C.; Jiang, M.; Johnson, S.; Jönsson, P.; Jung, C. K.; Kabirnezhad, M.; Kaboth, A. C.; Kajita, T.; Kakuno, H.; Kameda, J.; Karlen, D.; Kasetti, S. P.; Kataoka, Y.; Katori, T.; Kato, Y.; Kearns, E.; Khabibullin, M.; Khotjantsev, A.; Kikawa, T.; Kim, H.; Kim, J.; King, S.; Kisiel, J.; Knight, A.; Knox, A.; Kobayashi, T.; Koch, L.; Koga, T.; Konaka, A.; Kormos, L. L.; Koshio, Y.; Kostin, A.; Kowalik, K.; Kubo, H.; Kudenko, Y.; Kukita, N.; Kuribayashi, S.; Kurjata, R.; Kutter, T.; Kuze, M.; Labarga, L.; Łagoda, J.; Lamoureux, Mathieu; Laveder, M.; Lawe, M.; Licciardi, M.; Lindner, T.; Litchfield, R. P.; Liu, S. L.; Li, X.; Longhin, A.; Ludovici, L.; Lu, Xiaoxu; Lux, T.; Machado, L. N.; Magaletti, L.; Mahn, Kendall; Malek, M.; Manly, S.; Maret, L.; Marino, A. D.; Marti-Magro, L.; Martin, J. F.; Maruyama, T.; Matsubara, T.; Matsushita, K.; Matveev, V.; Mavrokoridis, K.; Mazzucato, E.; McCarthy, M.; McCauley, N.; McFarland, K. S.; McGrew, C.; Mefodiev, A.; Metelko, C.; Mezzetto, M.; Minamino, A.; Mineev, O.; Mine, S.; Miura, Makoto; Molina-Bueno, L.; Moriyama, S.; Morrison, John H.; Mueller, T.; Munteanu, L.; Murphy, S.; Nagai, Y.; Nakadaira, T.; Nakahata, M.; Nakajima, Yasuhiro; Nakamura, Akihiko; Nakamura, K.; Nakayama, S.; Nakaya, T.; Nakayoshi, K.; Nantais, C.; Ngoc, Tran Van; Niewczas, K.; Nishikawa, K.; Nishimura, Y.; Nonnenmacher, T. S.; Nova, F.; Novella, P.; Nowak, J.; Nugent, J. C.; O’Keeffe, H. M.; O’Sullivan, L.; Odagawa, T.; Okumura, K.; Okusawa, T.; Oser, S. M.; Owen, R. A.; Oyama, Y.; Palladino, V.; Palomino, J. L.; Paolone, V.; Parker, William C.; Pasternak, J.; Paudyal, P.; Pavin, M.; Payne, D. J.; Penn, G. C.; Pickering, L.; Pidcott, C.; Pintaudi, G.; Guerra, E. S. Pinzon; Pistillo, C.; Popov, Б.; Porwit, K.; Posiadała-Zezula, M.; Pritchard, A.; Quilain, B.; Radermacher, T.; Radicioni, E.; Radics, B.; Ratoff, P. N.; Reinherz‐Aronis, E.; Riccio, C.; Rondio, E.; Roth, Stefan; Rubbia, A.; Ruggeri, A. C.; Ruggles, C. A.; Rychter, A.; Sakashita, K.; Sánchez, F.; Schloesser, C. M.; Scholberg, K.; Schwehr, J.; Scott, M.; Seiya, Y.; Sekiguchi, T.; Sekiya, H.; Sgalaberna, D.; Shah, R.; Shaikhiev, A.; Shaker, F.; Shaykina, A.; Shiozawa, M.; Shorrock, William I.; Shvartsman, A.; Smirnov, A. Yu.; Smy, M. B.; Sobczyk, J.; Sobel, H. W.; Soler, F. J. P.; Sonoda, Y.; Steinmann, J.; Suvorov, S.; Suzuki, A.; Suzuki, S.; Suzuki, Yoshihiro; Sztuc, A. A.; Tada, M.; Tajima, M.; Takeda, Atsushi; Takeuchi, Y.; Tanaka, H.; Tanaka, H. A.; Tanaka, Satoshi; Thompson, L. F.; Toki, W. H.; Touramanis, C.; Towstego, T.; Tsui, K. M.; Tsukamoto, T.; Tzanov, M.; Uchida, Y.; Uno, W.; Vagins, M. R.; Valder, S.; Vallari, Z.; Vargas, D.; Vasseur, G.; Vilela, C.; Vinning, W. G. S.; Vladisavljevic, T.; Volkov, Vadim; Wąchała, T.; Walker, John M.; Walsh, J.; Wang, Y.; Wark, D.; Wascko, M. O.; Weber, A.; Wendell, R.; Wilking, M. J.; Wilkinson, C.; Wilson, J. R.; Wilson, R. J.; Wood, K.; Wret, C.; Yamada, Y.; Yamamoto, K.; Yanagisawa, C.; Yang, G.; Yano, T.; Yasutome, K.; Yen, S.; Yershov, N.; Yokoyama, M.; Yoshida, Tadashi; Yu, M.; Zalewska, A.; Zalipska, J.; Заремба, К.; Zarnecki, George; Ziembicki, M.; Zimmerman, E. D.; Zito, M.; Zsoldos, S.; Zykova, A.

doi:10.1103/physrevlett.124.161802

Cited by 21 publications

(12 citation statements)

References 27 publications

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“…In addition, 14 electron events where also a pion is produced were recorded. These results improve their former ones [71][72][73], allowing them now to exclude CP-conserving values of δ at close to 3σ confidence level.…”

Section: Jhep02(2021)071supporting

confidence: 60%

2020 global reassessment of the neutrino oscillation picture

Salas

Forero

Gariazzo

et al. 2021

J. High Energ. Phys.

601

632

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We present an updated global fit of neutrino oscillation data in the simplest three-neutrino framework. In the present study we include up-to-date analyses from a number of experiments. Concerning the atmospheric and solar sectors, besides the data considered previously, we give updated analyses of IceCube DeepCore and Sudbury Neutrino Observatory data, respectively. We have also included the latest electron antineutrino data collected by the Daya Bay and RENO reactor experiments, and the long-baseline T2K and NOνA measurements, as reported in the Neutrino 2020 conference. All in all, these new analyses result in more accurate measurements of θ13, θ12, $$ \Delta {m}_{21}^2 $$ Δ m 21 2 and $$ \left|\Delta {m}_{31}^2\right| $$ Δ m 31 2 . The best fit value for the atmospheric angle θ23 lies in the second octant, but first octant solutions remain allowed at ∼ 2.4σ. Regarding CP violation measurements, the preferred value of δ we obtain is 1.08π (1.58π) for normal (inverted) neutrino mass ordering. The global analysis still prefers normal neutrino mass ordering with 2.5σ statistical significance. This preference is milder than the one found in previous global analyses. These new results should be regarded as robust due to the agreement found between our Bayesian and frequentist approaches. Taking into account only oscillation data, there is a weak/moderate preference for the normal neutrino mass ordering of 2.00σ. While adding neutrinoless double beta decay from the latest Gerda, CUORE and KamLAND-Zen results barely modifies this picture, cosmological measurements raise the preference to 2.68σ within a conservative approach. A more aggressive data set combination of cosmological observations leads to a similar preference for normal with respect to inverted mass ordering, namely 2.70σ. This very same cosmological data set provides 2σ upper limits on the total neutrino mass corresponding to Σmν< 0.12 (0.15) eV in the normal (inverted) neutrino mass ordering scenario. The bounds on the neutrino mixing parameters and masses presented in this up-to-date global fit analysis include all currently available neutrino physics inputs.

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Section: Jhep02(2021)071supporting

confidence: 60%

2020 global reassessment of the neutrino oscillation picture

Salas

Forero

Gariazzo

et al. 2021

J. High Energ. Phys.

601

632

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“…We have also updated our analysis of T2K and NOνA. In the case of T2K, the updated data sample corresponds to an exposure at Super-Kamiokande of 1.49×10 21 POT in neutrino mode and 1.63×10 21 POT in antineutrino mode and has been collected from January 2010 until June 2018 [331,332]. T2K observed 243 (140) muon (anti-muon) events and 75 (15) electron (positron) events.…”

Section: Long-baseline Acceleratorsmentioning

confidence: 99%

Neutrino oscillation phenomenology in the standard model and beyond

Ternes

2020

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“…2 Analysis of T2K and NOνA data T2K collected a large data sample, corresponding to an exposure at Super-Kamiokande of 1.49×10 21 protons on target (POT) in neutrino mode and 1.63×10 21 POT in antineutrino mode [4,12] observing 243 (140) muon (anti-muon) events and 75 (15) electron (positron) events. In addition, there are 15 electron events where also a pion is produced.…”

Section: Introductionmentioning

confidence: 99%

“…All necessary information on the experimental details is extracted from the corresponding references for each experiment, refs. [4,5,12,14] for the accelerators and refs. [10,11,[15][16][17][18] for the reactors, to be discussed in the next section.…”

Section: Introductionmentioning

confidence: 99%

CPT and CP, an entangled couple

Barenboim

Ternes

Tórtola

2020

J. High Energ. Phys.

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Even though it is undoubtedly very appealing to interpret the latest T2K results as evidence of CP violation, this claim assumes CPT conservation in the neutrino sector to an extent that has not been tested yet. As we will show, T2K results are not robust against a CPT-violating explanation. On the contrary, a CPT-violating CP-conserving scenario is in perfect agreement with current neutrino oscillation data. Therefore, to elucidate whether T2K results imply CP or CPT violation is of utter importance. We show that, even after combining with data from NOνA and from reactor experiments, no claims about CP violation can be made. Finally, we update the bounds on CPT violation in the neutrino sector.

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Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam

Cited by 21 publications

References 27 publications

2020 global reassessment of the neutrino oscillation picture

2020 global reassessment of the neutrino oscillation picture

Neutrino oscillation phenomenology in the standard model and beyond

CPT and CP, an entangled couple

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