We present the results of the charge ratio (R) and polarization (P0μ) measurements using decay electron events collected between September 2008 and June 2022 with the Super-Kamiokande detector. Because of its underground location and long operation, we are able to perform high-precision measurements by accumulating cosmic-ray muons. We measured the muon charge ratio to be R=1.32±0.02(stat+syst) at EμcosθZenith=0.7-0.2+0.3 TeV, where Eμ is the muon energy and θZenith is the zenith angle of incoming cosmic-ray muons. This result is consistent with the Honda flux model while indicating a tension with the πK model of 1.9σ. We also measured the muon polarization at the production location to be P0μ=0.52±0.02 (stat+syst) at the muon momentum of 0.9-0.1+0.6 TeV/c at the surface of the mountain; this also suggests a tension with the Honda flux model of 1.5σ. This is the most precise measurement ever to experimentally determine the cosmic-ray muon polarization near 1 TeV/c. These measurement results are useful to improve atmospheric neutrino simulations.

Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector / Kitagawa, H.; Tada, T.; Abe, K.; Bronner, C.; Hayato, Y.; Hiraide, K.; Hosokawa, K.; Ieki, K.; Ikeda, M.; Kameda, J.; Kanemura, Y.; Kaneshima, R.; Kashiwagi, Y.; Kataoka, Y.; Miki, S.; Mine, S.; Miura, M.; Moriyama, S.; Nakahata, M.; Nakano, Y.; Nakayama, S.; Noguchi, Y.; Okamoto, K.; Sato, K.; Sekiya, H.; Shiba, H.; Shimizu, K.; Shiozawa, M.; Sonoda, Y.; Suzuki, Y.; Takeda, A.; Takemoto, Y.; Takenaka, A.; Tanaka, H.; Watanabe, S.; Yano, T.; Han, S.; Kajita, T.; Okumura, K.; Tashiro, T.; Tomiya, T.; Wang, X.; Yoshida, S.; Megias, G. D.; Fernandez, P.; Labarga, L.; Ospina, N.; Zaldivar, B.; Kearns, E.; Raaf, J. L.; Wan, L.; Wester, T.; Pointon, B. W.; Bian, J.; Griskevich, N. J.; Locke, S.; Smy, M. B.; Sobel, H. W.; Takhistov, V.; Yankelevich, A.; Hill, J.; Jang, M. C.; Lee, S. H.; Moon, D. H.; Park, R. G.; Bodur, B.; Scholberg, K.; Walter, C. W.; Beauchêne, A.; Drapier, O.; Giampaolo, A.; Mueller, Th. A.; Paganini, P.; Quilain, B.; Rogly, R.; Santos, A. D.; Nakamura, T.; Jang, J. S.; Machado, L. N.; Learned, J. G.; Choi, K.; Iovine, N.; Cao, S.; Anthony, L. H. V.; Marin, D.; Prouse, N. W.; Scott, M.; Sztuc, A. A.; Uchida, Y.; Berardi, V.; Calabria, N. F.; Catanesi, M. G.; Radicioni, E.; Langella, A.; De Rosa, G.; Collazuol, G.; Iacob, F.; Lamoureux, M.; Mattiazzi, M.; Ludovici, L.; Gonin, M.; Perisse, L.; Pronost, G.; Fujisawa, C.; Maekawa, Y.; Nishimura, Y.; Okazaki, R.; Akutsu, R.; Friend, M.; Hasegawa, T.; Ishida, T.; Jakkapu, M.; Kobayashi, T.; Matsubara, T.; Nakadaira, T.; Nakamura, K.; Oyama, Y.; Sakashita, K.; Sekiguchi, T.; Tsukamoto, T.; Bhuiyan, N.; Burton, G. T.; Gao, J.; Goldsack, A.; Katori, T.; Lodovico, F. Di.; Migenda, J.; Ramsden, R. M.; Xie, Z.; Zsoldos, S.; Kotsar, Y.; Ozaki, H.; Suzuki, A. T.; Takagi, Y.; Takeuchi, Y.; Zhong, H.; Feng, J.; Feng, L.; Hu, J. R.; Hu, Z.; Kawaue, M.; Kikawa, T.; Mori, M.; Nakaya, T.; Wendell, R. A.; Yasutome, K.; Jenkins, S. J.; Mccauley, N.; Mehta, P.; Tarrant, A.; Wilking, M. J.; Fukuda, Y.; Itow, Y.; Menjo, H.; Ninomiya, K.; Yoshioka, Y.; Lagoda, J.; Mandal, M.; Mijakowski, P.; Prabhu, Y. S.; Zalipska, J.; Jia, M.; Jiang, J.; Jung, C. K.; Shi, W.; Yanagisawa, C.; Harada, M.; Hino, Y.; Ishino, H.; Koshio, Y.; Nakanishi, F.; Sakai, S.; Tano, T.; Ishizuka, T.; Barr, G.; Barrow, D.; Cook, L.; Samani, S.; Wark, D.; Holin, A. M.; Nova, F.; Jung, S.; Yang, B. S.; Yang, J. Y.; Yoo, J.; Fannon, J. E. P.; Kneale, L.; Malek, M.; Mcelwee, J. M.; Thiesse, M. D.; Thompson, L. F.; Wilson, S. T.; Okazawa, H.; Lakshmi, S. M.; Kim, S. B.; Kwon, E.; Seo, J. W.; Yu, I.; Ichikawa, A. K.; Nakamura, K. D.; Tairafune, S.; Nishijima, K.; Eguchi, A.; Nakagiri, K.; Nakajima, Y.; Shima, S.; Taniuchi, N.; Watanabe, E.; Yokoyama, M.; Fujita, S.; Jesus-Valls, C.; Martens, K.; Tsui, K. M.; de Perio, P.; Vagins, M. R.; Xia, J.; Izumiyama, S.; Kuze, M.; Matsumoto, R.; Terada, K.; Ishitsuka, M.; Ito, H.; Kinoshita, T.; Ommura, Y.; Shigeta, N.; Shinoki, M.; Suganuma, T.; Yamauchi, K.; Yoshida, T.; Martin, J. F.; Tanaka, H. A.; Towstego, T.; Gaur, R.; Gousy-Leblanc, V.; Hartz, M.; Konaka, A.; Li, X.; Chen, S.; Xu, B. D.; Zhang, B.; Posiadala-Zezula, M.; Boyd, S. B.; Edwards, R.; Hadley, D.; Nicholson, M.; O'Flaherty, M.; Richards, B.; Ali, A.; Jamieson, B.; Amanai, S.; Marti, Ll.; Minamino, A.; Pintaudi, G.; Sano, S.; Suzuki, S.; Wada, K.; Null, Null. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 110:8(2024). [10.1103/physrevd.110.082008]

Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector

Berardi, V.;Calabria, N. F.;
2024

Abstract

We present the results of the charge ratio (R) and polarization (P0μ) measurements using decay electron events collected between September 2008 and June 2022 with the Super-Kamiokande detector. Because of its underground location and long operation, we are able to perform high-precision measurements by accumulating cosmic-ray muons. We measured the muon charge ratio to be R=1.32±0.02(stat+syst) at EμcosθZenith=0.7-0.2+0.3 TeV, where Eμ is the muon energy and θZenith is the zenith angle of incoming cosmic-ray muons. This result is consistent with the Honda flux model while indicating a tension with the πK model of 1.9σ. We also measured the muon polarization at the production location to be P0μ=0.52±0.02 (stat+syst) at the muon momentum of 0.9-0.1+0.6 TeV/c at the surface of the mountain; this also suggests a tension with the Honda flux model of 1.5σ. This is the most precise measurement ever to experimentally determine the cosmic-ray muon polarization near 1 TeV/c. These measurement results are useful to improve atmospheric neutrino simulations.
2024
Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector / Kitagawa, H.; Tada, T.; Abe, K.; Bronner, C.; Hayato, Y.; Hiraide, K.; Hosokawa, K.; Ieki, K.; Ikeda, M.; Kameda, J.; Kanemura, Y.; Kaneshima, R.; Kashiwagi, Y.; Kataoka, Y.; Miki, S.; Mine, S.; Miura, M.; Moriyama, S.; Nakahata, M.; Nakano, Y.; Nakayama, S.; Noguchi, Y.; Okamoto, K.; Sato, K.; Sekiya, H.; Shiba, H.; Shimizu, K.; Shiozawa, M.; Sonoda, Y.; Suzuki, Y.; Takeda, A.; Takemoto, Y.; Takenaka, A.; Tanaka, H.; Watanabe, S.; Yano, T.; Han, S.; Kajita, T.; Okumura, K.; Tashiro, T.; Tomiya, T.; Wang, X.; Yoshida, S.; Megias, G. D.; Fernandez, P.; Labarga, L.; Ospina, N.; Zaldivar, B.; Kearns, E.; Raaf, J. L.; Wan, L.; Wester, T.; Pointon, B. W.; Bian, J.; Griskevich, N. J.; Locke, S.; Smy, M. B.; Sobel, H. W.; Takhistov, V.; Yankelevich, A.; Hill, J.; Jang, M. C.; Lee, S. H.; Moon, D. H.; Park, R. G.; Bodur, B.; Scholberg, K.; Walter, C. W.; Beauchêne, A.; Drapier, O.; Giampaolo, A.; Mueller, Th. A.; Paganini, P.; Quilain, B.; Rogly, R.; Santos, A. D.; Nakamura, T.; Jang, J. S.; Machado, L. N.; Learned, J. G.; Choi, K.; Iovine, N.; Cao, S.; Anthony, L. H. V.; Marin, D.; Prouse, N. W.; Scott, M.; Sztuc, A. A.; Uchida, Y.; Berardi, V.; Calabria, N. F.; Catanesi, M. G.; Radicioni, E.; Langella, A.; De Rosa, G.; Collazuol, G.; Iacob, F.; Lamoureux, M.; Mattiazzi, M.; Ludovici, L.; Gonin, M.; Perisse, L.; Pronost, G.; Fujisawa, C.; Maekawa, Y.; Nishimura, Y.; Okazaki, R.; Akutsu, R.; Friend, M.; Hasegawa, T.; Ishida, T.; Jakkapu, M.; Kobayashi, T.; Matsubara, T.; Nakadaira, T.; Nakamura, K.; Oyama, Y.; Sakashita, K.; Sekiguchi, T.; Tsukamoto, T.; Bhuiyan, N.; Burton, G. T.; Gao, J.; Goldsack, A.; Katori, T.; Lodovico, F. Di.; Migenda, J.; Ramsden, R. M.; Xie, Z.; Zsoldos, S.; Kotsar, Y.; Ozaki, H.; Suzuki, A. T.; Takagi, Y.; Takeuchi, Y.; Zhong, H.; Feng, J.; Feng, L.; Hu, J. R.; Hu, Z.; Kawaue, M.; Kikawa, T.; Mori, M.; Nakaya, T.; Wendell, R. A.; Yasutome, K.; Jenkins, S. J.; Mccauley, N.; Mehta, P.; Tarrant, A.; Wilking, M. J.; Fukuda, Y.; Itow, Y.; Menjo, H.; Ninomiya, K.; Yoshioka, Y.; Lagoda, J.; Mandal, M.; Mijakowski, P.; Prabhu, Y. S.; Zalipska, J.; Jia, M.; Jiang, J.; Jung, C. K.; Shi, W.; Yanagisawa, C.; Harada, M.; Hino, Y.; Ishino, H.; Koshio, Y.; Nakanishi, F.; Sakai, S.; Tano, T.; Ishizuka, T.; Barr, G.; Barrow, D.; Cook, L.; Samani, S.; Wark, D.; Holin, A. M.; Nova, F.; Jung, S.; Yang, B. S.; Yang, J. Y.; Yoo, J.; Fannon, J. E. P.; Kneale, L.; Malek, M.; Mcelwee, J. M.; Thiesse, M. D.; Thompson, L. F.; Wilson, S. T.; Okazawa, H.; Lakshmi, S. M.; Kim, S. B.; Kwon, E.; Seo, J. W.; Yu, I.; Ichikawa, A. K.; Nakamura, K. D.; Tairafune, S.; Nishijima, K.; Eguchi, A.; Nakagiri, K.; Nakajima, Y.; Shima, S.; Taniuchi, N.; Watanabe, E.; Yokoyama, M.; Fujita, S.; Jesus-Valls, C.; Martens, K.; Tsui, K. M.; de Perio, P.; Vagins, M. R.; Xia, J.; Izumiyama, S.; Kuze, M.; Matsumoto, R.; Terada, K.; Ishitsuka, M.; Ito, H.; Kinoshita, T.; Ommura, Y.; Shigeta, N.; Shinoki, M.; Suganuma, T.; Yamauchi, K.; Yoshida, T.; Martin, J. F.; Tanaka, H. A.; Towstego, T.; Gaur, R.; Gousy-Leblanc, V.; Hartz, M.; Konaka, A.; Li, X.; Chen, S.; Xu, B. D.; Zhang, B.; Posiadala-Zezula, M.; Boyd, S. B.; Edwards, R.; Hadley, D.; Nicholson, M.; O'Flaherty, M.; Richards, B.; Ali, A.; Jamieson, B.; Amanai, S.; Marti, Ll.; Minamino, A.; Pintaudi, G.; Sano, S.; Suzuki, S.; Wada, K.; Null, Null. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 110:8(2024). [10.1103/physrevd.110.082008]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/287021
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