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

Journal Article · Thu Aug 15 00:00:00 EDT 2013 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776113100129· OSTI ID:22210513

Adriani, O. ^[1]; Barbarino, G. C. ^[2]; Bazilevskaya, G. A. ^[3]; Bellotti, R. ^[4]; Boezio, M. ^[5]; Bogomolov, E. A. ^[6]; Bonechi, L.; Bongi, M. ^[1]; Bonvicini, V. ^[5]; Bottai, S. ^[1]; Bruno, A. ^[4]; Vacchi, A. ^[5]; Vannuccini, E. ^[1]; Vasilyev, G. I. ^[6]; Voronov, S. A.; Galper, A. M.; Danilchenko, I. A. ^[7]; Donato, C. De; Santis, C. De ^[8]; others, and

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1. Structure of Florence and Physics Department of University of Florence, INFN (Italy)
2. Structure of Naples and Physics Department of University of Naples, INFN (Italy)
3. Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)
4. Structure of Bari and Physics Department of University of Bari, INFN (Italy)
5. Structure of Trieste and Physics Department of University of Trieste, INFN (Italy)
6. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
7. 'MEPhI' National Research Nuclear University (Russian Federation)
8. Structure of Rome Tor Vergata and Physics Department of University of Rome Tor Vergata, INFN (Italy)

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.

• OSTI ID: 22210513
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 117, Issue 2; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

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