@article{2ccc2332184945ae8fdeb11005b92e80,
title = "Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector",
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.",
author = "{(Super-Kamiokande Collaboration)} and H. Kitagawa and T. Tada and K. Abe and C. Bronner and Y. Hayato and K. Hiraide and K. Hosokawa and K. Ieki and M. Ikeda and J. Kameda and Y. Kanemura and R. Kaneshima and Y. Kashiwagi and Y. Kataoka and S. Miki and S. Mine and M. Miura and S. Moriyama and M. Nakahata and Y. Nakano and S. Nakayama and Y. Noguchi and K. Okamoto and K. Sato and H. Sekiya and H. Shiba and K. Shimizu and M. Shiozawa and Y. Sonoda and Y. Suzuki and A. Takeda and Y. Takemoto and A. Takenaka and H. Tanaka and S. Watanabe and T. Yano and S. Han and T. Kajita and K. Okumura and T. Tashiro and T. Tomiya and X. Wang and S. Yoshida and Megias, {G. D.} and P. Fernandez and L. Labarga and N. Ospina and B. Zaldivar and E. Kearns and Raaf, {J. L.}",
note = "Publisher Copyright: {\textcopyright} 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",
year = "2024",
month = oct,
day = "15",
doi = "10.1103/PhysRevD.110.082008",
language = "英語",
volume = "110",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "8",
}