CHAMP cosmic rays
CHAMP cosmic rays
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CHAMP宇宙射线
DOI:
10.1088/1475-7516/2019/07/015
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发表时间:
2019
影响因子:
6.4
通讯作者:
Harigaya, Keisuke
中科院分区:
文献类型:
--
作者:
Dunsky, David;Hall, Lawrence J.;Harigaya, Keisuke
We study interactions of cosmological relics, X, of mass m and electric charge qe in the galaxy, including thermalization with the interstellar medium, diffusion through inhomogeneous magnetic fields and Fermi acceleration by supernova shock waves. We find that for m≲ 10 10 q GeV, there is a large flux of accelerated X in the disk today, with a momentum distribution∝ 1/p 2.5 extending to (β p) max∼ 5× 10 4 q GeV. Even though acceleration in supernova shocks is efficient, ejecting X from the galaxy, X are continually replenished by diffusion into the disk from the halo or confinement region. For m≳ 10 10 q GeV, X cannot be accelerated above the escape velocity within the lifetime of the shock. The accelerated X form a component of cosmic rays that can easily reach underground detectors, as well as deposit energies above thresholds, enhancing signals in various experiments. We find that nuclear/electron recoil experiments place very stringent bounds on X at low q; for example, X as dark matter is excluded for q> 10− 9 and m< 10 5 GeV. For larger q or m, stringent bounds on the fraction of dark matter that can be X are set by Cherenkov and ionization detectors. Nevertheless, very small q is highly motivated by the kinetic mixing portal, and we identify regions of (m, q) that can be probed by future experiments.
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DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
D. Weinberg;L. Hernquist;N. Katz
通讯作者:
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DOI:
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发表时间:
1986
期刊:
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作者:
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通讯作者:
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DOI:
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1985
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DOI:
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发表时间:
2019
期刊:
Springer Reference Medizin
影响因子:
--
作者:
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通讯作者:
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影响因子:
8.6
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