Prompt atmospheric neutrinos and muons: Dependence on the gluon distribution function

Phys. Rev. D 61, 056011 – Published 11 February 2000
Graciela Gelmini, Paolo Gondolo, and Gabriele Varieschi

Abstract

We compute the next-to-leading order QCD predictions for the vertical flux of atmospheric muons and neutrinos from decays of charmed particles, for different PDF’s (MRS-R1, MRS-R2, CTEQ-4M and MRST) and different extrapolations of these at a small partonic momentum fraction x. We find that the predicted fluxes vary up to almost two orders of magnitude at the largest energies studied, depending on the chosen extrapolation of the PDF’s. We show that the spectral index of the atmospheric leptonic fluxes depends linearly on the slope of the gluon distribution function at very small x. This suggests the possibility of obtaining some bounds on this slope in “neutrino telescopes,” at values of x not reachable at colliders, provided the spectral index of atmospheric leptonic fluxes could be determined.

DOI: http://dx.doi.org/10.1103/PhysRevD.61.056011

  • Received 18 May 1999
  • Published 11 February 2000

© 2000 The American Physical Society

Authors & Affiliations

Graciela Gelmini*

  • Department of Physics and Astronomy, UCLA (University of California, Los Angeles), 405 Hilgard Avenue, Los Angeles, California 90095

Paolo Gondolo

  • Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany

Gabriele Varieschi

  • Department of Physics and Astronomy, UCLA (University of California, Los Angeles), 405 Hilgard Avenue, Los Angeles, California 90095

  • *Email address: gelmini@physics.ucla.edu
  • Email address: gondolo@mppmu.mpg.de
  • Email address: variesch@physics.ucla.edu

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