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Title: North-south asymmetry for high-energy cosmic-ray electrons measured with the PAMELA experiment

The north-south asymmetry for cosmic-ray particles was measured with one instrument of the PAMELA satellite-borne experiment in the period June 2006-May 2009. The analysis has been performed by two independent methods: by comparing the count rates in regions with identical geomagnetic conditions and by comparing the experimental distribution of particle directions with the simulated distribution that would be in the case of an isotropic particle flux. The dependences of the asymmetry on energy release in the PAMELA calorimeter and on time have been constructed. The asymmetry (N{sub n} - N{sub s})/(N{sub n} + N{sub s}) is 0.06 {+-} 0.004 at the threshold energy release in the calorimeter and gradually decreases with increasing energy release. The observed effect is shown to be produced by electrons in the energy range 10-100 GeV.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ; ;  [2] ;  [6] ;  [2] ;  [5] ;  [6] ;  [2] ;  [7] ; ; ;  [1] ; ;  [8] more »; « less
  1. 'MEPhI' National Research Nuclear University (Russian Federation)
  2. Structure of Florence and Physics Department of University of Florence, INFN (Italy)
  3. Structure of Naples and Physics Department of University of Naples, INFN (Italy)
  4. Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)
  5. Structure of Bari and Physics Department of University of Bari, INFN (Italy)
  6. Structure of Trieste and Physics Department of University of Trieste, INFN (Italy)
  7. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
  8. Structure of Rome Tor Vergata and Physics Department of University of Rome Tor Vergata, INFN (Italy)
Publication Date:
OSTI Identifier:
22210513
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 117; Journal Issue: 2; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AUGMENTATION; CALORIMETERS; COMPARATIVE EVALUATIONS; COSMIC RADIATION; COUNTING RATES; DISTRIBUTION; ELECTRONS; GEV RANGE; NORTH-SOUTH ASYMMETRY; PARTICLES; SATELLITES; SIMULATION; THRESHOLD ENERGY