Constraint on the matter–antimatter symmetry-violating phase in neutrino oscillations

Abe, K.; Akutsu, R.; Ali, Ahmed Farag; Alt, C.; Andreopoulos, C.; Anthony, L. H. V.; Antonova, M.; Aoki, Shigeki; Ariga, A.; Arihara, T.; 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.; Berguño, D. Bravo; Bronner, C.; Bubak, A.; Avanzini, M. Buizza; Calcutt, J.; Campbell, T.; Cao, S.; Cartwright, S.; Catanesi, M. G.; Cervera, A.; Chappell, A.; Checchia, C.; Cherdack, D.; Chikuma, N.; Cicerchia, M.; Christodoulou, G.; Coleman, J. P.; Collazuol, G.; Cook, L.; Coplowe, D.; Cudd, A.; Dąbrowska, A.; Rosa, G.; Dealtry, T.; Denner, P. F.; Dennis, Steve; Densham, C.; Lodovico, F. Di; Dokania, N.; Dolan, S.; Doyle, Tony; Drapier, O.; Dumarchez, J.; Dunne, P.; Eguchi, Akihiro; 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.; Hassani, S.; 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.; Junjie, X.; Jurj, P. B.; 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.; Kikutani, H.; Kim, H.; Kim, J.; King, S.; Kisiel, J.; Knight, A.; Knox, A.; Kobayashi, Toshio; 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.; McElwee, J.; McFarland, K. S.; McGrew, C.; Mefodiev, A.; Metelko, C.; Mezzetto, M.; Minamino, A.; Mineev, O.; Mine, S.; Miura, Makoto; Bueno, L. Molina; 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.; Naseby, C. E. R.; Ngoc, Tran Van; Niewczas, K.; Nishikawa, K.; Nishimura, Y.; Noah, E.; 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.; Pari, M.; Parker, William C.; Parsa, S.; 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.; Santucci, G.; 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, Richard; 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:10.1038/s41586-020-2177-0

Cited by 388 publications

(288 citation statements)

References 57 publications

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“…is used to calculate the rate þ shape p value, where the χ 2 values are calculated by marginalizing over all systematic and oscillation parameters, including the mass ordering. In both analyses, other data samples-ν μ -like and ν e -like in neutrino beam mode andν μ -like in antineutrino beam mode-are used to constrain other PMNS oscillation parameters, as in other T2K analyses [11]. A complementary analysis allows β to be a continuous free parameter with limits between 0 and infinity.…”

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confidence: 99%

“…The model used is described in Refs. [8] and [11]. The most relevant contributions for this analysis are highlighted here.…”

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confidence: 99%

“…The samples-unchanged from Ref. [11]-are selected from events that begin in one of two fine-grained detectors (FGDs) and produce tracks that enter the time-projection chambers, which are interleaved with the FGDs. Both FGDs are composed of layers of bars of plastic scintillator, and the more downstream FGD additionally has panels of water interleaved between layers of scintillator.…”

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confidence: 99%

See 2 more Smart Citations

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

Abe¹,

Akutsu²,

Ali³

et al. 2020

Phys. Rev. Lett.

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mentioning

confidence: 99%

“…The model used is described in Refs. [8] and [11]. The most relevant contributions for this analysis are highlighted here.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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

Abe¹,

Akutsu²,

Ali³

et al. 2020

Phys. Rev. Lett.

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“…One of the major goals of the global neutrino physics programme is to explore fundamental symmetries of nature linked to why we live in a matter-dominated universe. Charge-parity symmetry violation (CPV) in the neutrino sector is one possibility remaining to be explored further experimentally, and neutrino experiments strive to improve current measurements of CPV in the leptonic sector [1]. CPV is obtained from the simultaneous fit of the ν µ disappearance and ν e appearance oscillation channels separately for neutrinos and anti-neutrinos.…”

Section: Introductionmentioning

confidence: 99%

“…The proton final state modelling is a key ingredient for neutrino oscillation measurements because it affects the event selection and neutrino energy reconstruction in charged-current (CC) interactions, which is the channel used to measure oscillation parameters and is therefore central to the search for CPV [13]. For these reasons, FSI contribute substantially to the total neutrino interaction systematic uncertainty [1]. Data [14] are compared to a semi-empirical model [11].…”

Section: Introductionmentioning

confidence: 99%

Off-Axis Characterisation of the CERN T10 Beam for low Momentum Proton Measurements with a High Pressure Gas Time Projection Chamber

et al. 2020

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We present studies of proton fluxes in the T10 beamline at CERN. A prototype high pressure gas time projection chamber (TPC) was exposed to the beam of protons and other particles, using the 0.8 GeV/c momentum setting in T10, in order to make cross section measurements of low energy protons in argon. To explore the energy region comparable to hadrons produced by GeV-scale neutrino interactions at oscillation experiments, i.e., near 0.1 GeV of kinetic energy, methods of moderating the T10 beam were employed: the dual technique of moderating the beam with acrylic blocks and measuring scattered protons off the beam axis was used to decrease the kinetic energy of incident protons, as well as change the proton/minimum ionising particle (MIP) composition of the incident flux. Measurements of the beam properties were made using time of flight systems upstream and downstream of the TPC. The kinetic energy of protons reaching the TPC was successfully changed from ∼0.3 GeV without moderator blocks to less than 0.1 GeV with four moderator blocks (40 cm path length). The flux of both protons and MIPs off the beam axis was increased. The ratio of protons to MIPs vary as a function of the off-axis angle allowing for possible optimisation of the detector to select the type of required particles. Simulation informed by the time of flight measurements show that with four moderator blocks placed in the beamline, (5.6 ± 0.1) protons with energies below 0.1 GeV per spill traversed the active TPC region. Measurements of the beam composition and energy are presented.

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Neutrino physics: Experimental and theoretical challenges

Felipe

2023

Astron Nachr

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The existence of massive neutrinos is the first solid evidence of physics beyond the standard model of particle physics. A remarkable progress has been achieved in solar, atmospheric, reactor, and accelerator neutrino experiments during the last decades. On the theoretical side, several questions are being addressed, namely the Dirac or Majorana nature of neutrinos, the mechanisms for neutrino mass generation, and the relation between neutrinos and the matter–antimatter asymmetry observed in the Universe, among others. This article provides a brief overview on some of the current experimental and theoretical aspects in neutrino physics.

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Constraint on the matter–antimatter symmetry-violating phase in neutrino oscillations

Cited by 388 publications

References 57 publications

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

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

Off-Axis Characterisation of the CERN T10 Beam for low Momentum Proton Measurements with a High Pressure Gas Time Projection Chamber

Neutrino physics: Experimental and theoretical challenges

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