TY - JOUR
T1 - Expected enhancement of the primary antiproton flux at the solar minimum
AU - Mitsui, T.
AU - Maki, K.
AU - Orito, S.
N1 - Funding Information:
We are grateful to all the members collaborating on the BESS experiment.S incere thanks are due to M. Drees and M.M. Nojiri for allowing us to use their routines to calculate the neutralino relic density. The data of the CLIMAX neutron monitor were provided by University of Chicago, National Science Foundation Grant ATM-9420790. All the calculations were performedo n the RS/6000 workstations of the International Center for Elementary Particle Physics (ICEPP). K.M. acknowledgesa fellowship from the Japan Society for the Promotion of Science.
PY - 1996/12/5
Y1 - 1996/12/5
N2 - We calculate the solar-modulated energy spectra of cosmic-ray antiprotons (p̄'s) from two candidate primary sources, i.e., evaporating primordial black holes and the annihilation of neutralino dark matter, as well as for the secondary p̄'s produced by cosmic-ray interactions with interstellar gas. A large enhancement toward the solar minimum phase emerges in the low-energy flux of p̄'s from the primary sources, whereas the flux of the secondary p̄'s, falling steeply below 2 GeV, does not significantly vary. This enables us to conduct a very sensitive search for primary p̄ components by precisely measuring the p̄ spectrum, especially at low energies, throughout the forthcoming solar minimum phase.
AB - We calculate the solar-modulated energy spectra of cosmic-ray antiprotons (p̄'s) from two candidate primary sources, i.e., evaporating primordial black holes and the annihilation of neutralino dark matter, as well as for the secondary p̄'s produced by cosmic-ray interactions with interstellar gas. A large enhancement toward the solar minimum phase emerges in the low-energy flux of p̄'s from the primary sources, whereas the flux of the secondary p̄'s, falling steeply below 2 GeV, does not significantly vary. This enables us to conduct a very sensitive search for primary p̄ components by precisely measuring the p̄ spectrum, especially at low energies, throughout the forthcoming solar minimum phase.
KW - Cosmic-ray antiprotons
KW - Dark matter
KW - Hawking radiation
KW - Primordial black holes
KW - Solar modulation
KW - Supersymmetric models
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U2 - 10.1016/S0370-2693(96)01363-9
DO - 10.1016/S0370-2693(96)01363-9
M3 - Article
AN - SCOPUS:0000803520
VL - 389
SP - 169
EP - 175
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1
ER -