Experimental study of muon bundles observed in the Fréjus detector

Phys. Rev. D 40, 2163 – Published 1 October 1989
Ch. Berger et al. (Fréjus Collaboration)


The present study is based on a sample of 407 775 single muons and 12 559 muon bundles with zenith angles smaller than 60°, observed in the 12.3m×6m×6m Fréjus proton-decay detector, at a depth of 4850 hg/cm2. The variation of the vertical muon intensity with depth is given. Using a maximum-likelihood method, the muon lateral distribution of underground bundles is investigated as a function of muon multiplicity and zenith angle. The same method yields the true multiplicity distribution at the site depth, corrected for all detection effects.

DOI: http://dx.doi.org/10.1103/PhysRevD.40.2163

  • Received 5 May 1989
  • Published in the issue dated 1 October 1989

© 1989 The American Physical Society

Authors & Affiliations

Ch. Berger, M. Fröhlich, H. Mönch, R. Nisius, F. Raupach, and P. Schleper

  • I. Physikalisches Institut der Rheinisch-Westfälische Technische Hochschule Aachen, D-5100 Aachen, Federal Republic of Germany

Y. Benadjal, D. Blum, C. Bourdarious, B. Dudelzak, P. Eschstruth, S. Jullian, D. Lalanne, F. Laplanche, C. Longuemare, C. Paulot, O. Perdereau, Ph. Roy, and G. Szklarz

  • Laboratoire de l'Accélérateur Linéaire, Centre d'Orsay, Bâtiment 200, F-91405 Orsay, France

L. Behr, B. Degrange, Y. Minet, U. Nguyen-Khac, P. Serri, S. Tisserant, and R. D. Tripp*

  • Laboratoire de Physique Nucléaire des Hautes Energies, Ecole Polytechnique, Route de Saclay, F-91128 Palaiseau, France

C. Arpesella, P. Bareyre, R. Barloutaud, A. Borg, G. Chardin, J. Ernwein, J. F. Glicenstein, L. Mosca, and L. Moscoso

  • Département de Physique des Particules Élémentaires, Saclay, Boîte Postale No. 2, F-91191 Gif-sur-Yvette, France

J. Becker, K. H. Becker, H. J. Daum, S. Demski, B. Jacobi, B. Kuznik, R. Mayer, H. Meyer, R. Möller, M. Schubnell, B. Seyffert, Y. Wei, and P. Wintgen§

  • Universität-Gesamthochschule Wuppertal, D-5600 Wuppertal 1, Federal Republic of Germany

((Fréjus Collaboration))

  • *Permanent address: Lawrence Berkeley Laboratory, Berkeley, CA 94720.
  • Present address: Istituto di Fisica, Universita di Milano, Milano, Italy.
  • Present address: Dornier GmbH, Friedrichshafen, Federal Republic of Germany.
  • §Present address: Fisher Controls GmbH, Solingen, Federal Republic of Germany.

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