| Autor: |
Kasuke Takahashi, Y. Fukuda, Nobuaki Sato, Atsumu Suzuki, Toru Tanimori, K. Kaneyuki, M. Takita, H. Takei, Yasunari Suzuki, R. Van Berg, T. Kajita, Y. Yaginuma, K. Nakamura, Teruhiro Suda, Y. Totsuka, K. S. Hirata, A.K. Mann, Miho Yamada, Masayuki Nakahata, Yoshihiko Nagashima, Kazumasa Miyano, F. M. Newcomer, H. Miyata, Soo-Bong Kim, Yuichi Oyama, W. Frati, Weiya Zhang, T. Tajima, Tadashi Kifune, M. Koshiba, S. Ohara, E. W. Beier, Masaki Mori, E. D. Frank, K. Kihara |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Physical review. D, Particles and fields. 44(3) |
| ISSN: |
0556-2821 |
| Popis: |
We measured the charge ratio and the polarization of the high-energy cosmic-ray muons arriving with zenith angles from 0\ifmmode^\circ\else\textdegree\fi{} to 90\ifmmode^\circ\else\textdegree\fi{} in the large underground water Cherenkov detector, Kamiokande II. The charge ratio [$R(\frac{{\ensuremath{\mu}}^{+}}{{\ensuremath{\mu}}^{\ensuremath{-}}})$] and the polarization (${P}_{0}$) are found to be 1.37\ifmmode\pm\else\textpm\fi{}0.06(stat)\ifmmode\pm\else\textpm\fi{}0.01(syst) and 0.26\ifmmode\pm\else\textpm\fi{}0.04(stat)\ifmmode\pm\else\textpm\fi{}0.05(syst), respectively, at the sea-level momentum of 1.2 TeV/c. This result for the charge ratio is in good agreement with those previously obtained in experiments using magnetic spectrometers at sea level and underground. This is the first measurement of the polarization of the cosmicray muons in the TeV region. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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