Published September 15, 2009 | Version v1
Journal article Metadata-only

Is the PAMELA anomaly caused by supernova explosions near the Earth?

Creators

  • 1. Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
  • 2. Physics Department, Lancaster University, Lancaster LA1 4YB (United Kingdom)
  • 3. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
  • 4. Department of Physical Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan)
  • 5. KEK Theory Center and the Graduate University for Advanced Studies (Sokendai), 1-1 Oho, Tsukuba 305-0801 (Japan)

Description

We show that the anomaly of the positron fraction observed by the PAMELA experiment can be attributed to recent supernova explosion(s) in a dense gas cloud near the Earth. Protons are accelerated around the supernova remnant. Electrons and positrons are created through hadronic interactions inside the dense gas cloud. Their spectrum is harder than that of the background because the supernova remnant spends much time in a radiative phase. Our scenario predicts that the antiproton flux dominates that of the background for > or approx. 100 GeV. We compare the results with observations (Fermi, HESS, PPB-BETS, and ATIC).

Additional details

Identifiers

DOI
10.1103/PhysRevD.80.063003;
arXiv
arXiv:0903.5298v3;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
80
Journal Issue
6
Journal Page Range
p. 063003-063003.5
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41063790
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
ANTIPROTONS; COMPARATIVE EVALUATIONS; ELECTRONS; EXPLOSIONS; GEV RANGE 100-1000; INTERACTIONS; POSITRONS; SPECTRA; SUPERNOVA REMNANTS
Descriptors DEC
ANTIBARYONS; ANTILEPTONS; ANTIMATTER; ANTINUCLEI; ANTINUCLEONS; ANTIPARTICLES; BARYONS; COSMIC RADIO SOURCES; ELEMENTARY PARTICLES; ENERGY RANGE; EVALUATION; FERMIONS; GEV RANGE; HADRONS; LEPTONS; MATTER; NUCLEI; NUCLEONS; PROTONS

Optional Information

Notes
(c) 2009 The American Physical Society