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Measurement of the cosmic-ray muon spectrum and charge ratio at large zenith angles in the momentum range 100 GeV/c to 10 TeV/c using a magnet spectrometer

Y. Muraki, Y. Kawashima, T. Kitamura, S. Matsuno, K. Mitsui, S. Miyake, Y. Ohashi, A. Okada, T. Suda et al.

S. Higashi, K. Honda†, S. Ozaki, T. Takahashi, and Y. Teramoto‡

Y. Kamiya and I. Nakamura

K. Kobayakawa

H. Shibata

Y. Minorikawa

S. Mikamo

P. V. Ramana Murthy*

  • Institute for Cosmic Rays, University of Tokyo, Tanashi, Tokyo 188, Japan

  • Department of Physics, Osaka City University, Osaka, Japan

  • Department of Physics, Nagoya University, Nagoya, Japan

  • Department of Physics, Kobe University, Kobe, Japan

  • Department of Physics, Okayama University, Okayama, Japan

  • Department of Physics, Kinki University, Higashi Osaka, Japan

  • High Energy Laboratory, Tsukuba-Ohocho, Ibaragi, Japan

  • *Present address: Tata Institute for Fundamental Research, Bombay, India.
  • †Present address: Department of Physics, Yamanashi University, Kofu, Japan.
  • ‡Present address: Brookhaven National Laboratory, Upton, NY 11973.
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Phys. Rev. D 28, 40 – Published 1 July, 1983

DOI: https://doi.org/10.1103/PhysRevD.28.40

Abstract

The cosmic-ray muon momentum spectrum and charge ratio up to momenta ≃ 10 TeV/c have been measured with high accuracy. The power index of the differential spectrum of parent mesons at production gradually increases with momentum and becomes 2.84±0.03 in the momentum range 0.8 to 10 TeV/c. The charge ratio is almost constant at a value of 1.27±0.02 from 0.1 to 10 TeV/c.

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Phys. Rev. D 28, 40– Published 1 July, 1983
  • Received 16 September 1981

© 1983 American Physical Society

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