Neutron-antineutron oscillation search using a 0.37 megaton-years exposure of Super-Kamiokande

Autor: Collaboration, Super-Kamiokande, Abe, K., Bronner, C., Hayato, Y., Ikeda, M., Imaizumi, S., Ito, H., Kameda, J., Kataoka, Y., Miura, M., Moriyama, S., Nagao, Y., Nakahata, M., Nakajima, Y., Nakayama, S., Okada, T., Okamoto, K., Orii, A., Pronost, G., Sekiya, H., Shiozawa, M., Sonoda, Y., Suzuki, Y., Takeda, A., Takemoto, Y., Takenaka, A., Tanaka, H., Yano, T., Akutsu, R., Han, S., Kajita, T., Okumura, K., Tashiro, T., Wang, R., Xia, J., Bravo-Berguño, D., Labarga, L., Marti, Ll., Zaldivar, B., Blaszczyk, F. d. M., Kearns, E., Gustafson, J. D., Raaf, J. L., Stone, J. L., Wan, L., Wester, T., Bian, J., Griskevich, N. J., Kropp, W. R., Locke, S., Mine, S., Smy, M. B., Sobel, H. W., Takhistov, V., Weatherly, P., Hill, J., Kim, J. Y., Lim, I. T., Park, R. G., Bodur, B., Scholberg, K., Walter, C. W., Coffani, A., Drapier, O., Hedri, S. El, Giampaolo, A., Gonin, M., Mueller, Th. A., Paganini, P., Quilain, B., Ishizuka, T., Nakamura, T., Jang, J. S., Learned, J. G., Anthony, L. H. V., Sztuc, A. A., Uchida, Y., Berardi, V., Catanesi, M. G., Radicioni, E., Calabria, N. F., Machado, L. N., De Rosa, G., Collazuol, G., Iacob, F., Lamoureux, M., Ospina, N., Ludovici, L., Nishimura, Y., Cao, S., Friend, M., Hasegawa, T., Ishida, T., Kobayashi, T., Matsubara, T., Nakadaira, T., Jakkapu, M., Nakamura, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Nakano, Y., Shiozawa, T., Suzuki, A. T., Takeuchi, Y., Yamamoto, S., Ali, A., Ashida, Y., Feng, J., Hirota, S., Ichikawa, A. K., Kikawa, T., Mori, M., Nakaya, T., Wendell, R. A., Yasutome, K., Fernandez, P., McCauley, N., Mehta, P., Pritchard, A., Tsui, K. M., Fukuda, Y., Itow, Y., Menjo, H., Niwa, T., Sato, K., Tsukada, M., Mijakowski, P., Posiadala-Zezula, M., Jung, C. K., Vilela, C., Wilking, M. J., Yanagisawa, C., Harada, M., Hagiwara, K., Horai, T., Ishino, H., Ito, S., Koshio, Y., Ma, W., Piplani, N., Sakai, S., Kuno, Y., Barr, G., Barrow, D., Cook, L., Goldsack, A., Samani, S., Simpson, C., Wark, D., Nova, F., Boschi, T., Di Lodovico, F., Sedgwick, S. Molina, Taani, M., Zsoldos, S., Yang, J. Y., Jenkins, S. J., McElwee, J. M., Thiesse, M. D., Thompson, L. F., Malek, M., Stone, O., Okazawa, H., Kim, S. B., Yu, I., Nishijima, K., Koshiba, M., Ogawa, N., Iwamoto, K., Yokoyama, M., Martens, K., Vagins, M. R., Kuze, M., Izumiyama, S., Tanaka, M., Yoshida, T., Inomoto, M., Ishitsuka, M., Matsumoto, R., Ohta, K., Shinoki, M., Martin, J. F., Tanaka, H. A., Towstego, T., Hartz, M., Konaka, A., de Perio, P., Prouse, N. W., Pointon, B. W., Chen, S., Xu, B. D., Richards, B., Jamieson, B., Walker, J., Minamino, A., Pintaudi, G., Sasaki, R.
Přispěvatelé: Abe, K., Bronner, C., Hayato, Y., Ikeda, M., Imaizumi, S., Ito, H., Kameda, J., Kataoka, Y., Miura, M., Moriyama, S., Nagao, Y., Nakahata, M., Nakajima, Y., Nakayama, S., Okada, T., Okamoto, K., Orii, A., Pronost, G., Sekiya, H., Shiozawa, M., Sonoda, Y., Suzuki, Y., Takeda, A., Takemoto, Y., Takenaka, A., Tanaka, H., Yano, T., Akutsu, R., Han, S., Kajita, T., Okumura, K., Tashiro, T., Wang, R., Xia, J., Bravo-Bergu??o, D., Labarga, L., Marti, Ll., Zaldivar, B., Blaszczyk, F. ???d. ???M., Kearns, E., Gustafson, J. ???D., Raaf, J. ???L., Stone, J. ???L., Wan, L., Wester, T., Bian, J., Griskevich, N. ???J., Kropp, W. ???R., Locke, S., Mine, S., Smy, M. ???B., Sobel, H. ???W., Takhistov, V., Weatherly, P., Hill, J., Kim, J. ???Y., Lim, I. ???T., Park, R. ???G., Bodur, B., Scholberg, K., Walter, C. ???W., Coffani, A., Drapier, O., El Hedri, S., Giampaolo, A., Gonin, M., Mueller, Th. ???A., Paganini, P., Quilain, B., Ishizuka, T., Nakamura, T., Jang, J. ???S., Learned, J. ???G., Anthony, L. ???H. ???V., Sztuc, A. ???A., Uchida, Y., Berardi, V., Catanesi, M. ???G., Radicioni, E., Calabria, N. F., Nascimento Machado, L., De Rosa, G., Collazuol, G., Iacob, F., Lamoureux, M., Ospina, N., Ludovici, L., Nishimura, Y., Cao, S., Friend, M., Hasegawa, T., Ishida, T., Kobayashi, T., Matsubara, T., Nakadaira, T., Jakkapu, M., Nakamura, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Nakano, Y., Shiozawa, T., Suzuki, A. ???T., Takeuchi, Y., Yamamoto, S., Ali, A., Ashida, Y., Feng, J., Hirota, S., Ichikawa, A. ???K., Kikawa, T., Mori, M., Nakaya, T., Wendell, R. ???A., Yasutome, K., Fernandez, P., Mccauley, N., Mehta, P., Pritchard, A., Tsui, K. ???M., Fukuda, Y., Itow, Y., Menjo, H., Niwa, T., Sato, K., Tsukada, M., Mijakowski, P., Posiadala-Zezula, M., Jung, C. ???K., Vilela, C., Wilking, M. ???J., Yanagisawa, C., Harada, M., Hagiwara, K., Horai, T., Ishino, H., Ito, S., Koshio, Y., Ma, W., Piplani, N., Sakai, S., Kuno, Y., Barr, G., Barrow, D., Cook, L., Goldsack, A., Samani, S., Simpson, C., Wark, D., Nova, F., Boschi, T., Di Lodovico, F., Molina Sedgwick, S., Taani, M., Zsoldos, S., Yang, J. ???Y., Jenkins, S. ???J., Mcelwee, J. ???M., Thiesse, M. ???D., Thompson, L. ???F., Malek, M., Stone, O., Okazawa, H., Kim, S. ???B., Yu, I., Nishijima, K., Koshiba, M., Ogawa, N., Iwamoto, K., Yokoyama, M., Martens, K., Vagins, M. ???R., Kuze, M., Izumiyama, S., Tanaka, M., Yoshida, T., Inomoto, M., Ishitsuka, M., Matsumoto, R., Ohta, K., Shinoki, M., Martin, J. ???F., Tanaka, H. ???A., Towstego, T., Hartz, M., Konaka, A., de Perio, P., Prouse, N. ???W., Pointon, B. ???W., Chen, S., Xu, B. ???D., Richards, B., Jamieson, B., Walker, J., Minamino, A., Pintaudi, G., Sasaki, R., Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Super-Kamiokande, UAM. Departamento de Física Teórica
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Baryogenesis and Leptogenesis Hadron mixing Neutrons C-symmetry Artificial neural networks Cherenkov detectors
Particle physics
data analysis method
Limits
Rest
Annihilation
FOS: Physical sciences
KAMIOKANDE
Antineutron
01 natural sciences
7. Clean energy
High Energy Physics - Experiment
High Energy Physics - Experiment (hep-ex)
Baryon asymmetry
statistical analysis
neutrino: atmosphere
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Particle Physics Experiments
Neutron
010306 general physics
n anti-n: oscillation
baryon number: violation
oscillation: time
Physics
lifetime
010308 nuclear & particles physics
Oscillation
High Energy Physics::Phenomenology
nucleus
Física
neutrino: background
baryon number: conservation law
Full data
baryon: asymmetry
High Energy Physics::Experiment
Baryon number
Super-Kamiokande
Simulation
Model
Bar (unit)
experimental results
Zdroj: Phys.Rev.D
Phys.Rev.D, 2021, 103 (1), pp.012008. ⟨10.1103/PhysRevD.103.012008⟩
Biblos-e Archivo. Repositorio Institucional de la UAM
instname
Physical Review
ISSN: 0370-274X
0587-4254
0550-3213
2470-0010
DOI: 10.1103/PhysRevD.103.012008⟩
Popis: As a baryon number violating process with ΔB=2, neutron-antineutron oscillation (n→n¯) provides a unique test of baryon number conservation. We have performed a search for n→n¯ oscillation with bound neutrons in Super-Kamiokande, with the full dataset from its first four run periods, representing an exposure of 0.37 Mton−years. The search used a multivariate analysis trained on simulated n→n¯ events and atmospheric neutrino backgrounds and resulted in 11 candidate events with an expected background of 9.3 events. In the absence of statistically significant excess, we derived a lower limit on n¯ appearance lifetime in O16 nuclei of 3.6×1032 years and on the neutron-antineutron oscillation time of τn→n¯>4.7×108 s at 90% C.L.
Databáze: OpenAIRE
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