Non-Perturbative Effect on Dark Matter Annihilation and Gamma Ray Signature from Galactic Center
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Accession number;05A0202252
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| Title;Non-Perturbative Effect on Dark Matter Annihilation and Gamma Ray Signature from Galactic Center |
| Author;
HISANO J
(Univ. Tokyo, Kashiwa, Jpn)
MATSUMOTO S
(Univ. Tokyo, Kashiwa, Jpn)
NOJIRI M M
(Kyoto Univ., Kyoto, Jpn)
SAITO O
(Univ. Tokyo, Kashiwa, Jpn)
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Journal Title;YITP
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Journal Code:L0911B
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ISSN:
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VOL.;NO.04-73;PAGE.44P(2005)
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| Figure&Table&Reference;FIG.15, TBL.1, REF.61 |
| Pub. Country;Japan |
| Language;English |
| Abstract;When the dark matter is realised in the minimal supersymmetric standard model (MSSM) and has an electroweak SU(2)L charge, the gamma ray fluxes from the galactic center due to dark matter annihilation are evaluated. In the case that the dark matter is heavy compared with the weak gauge boson, the perturbative calculation of the annihilation cross section is not valid due to the threshold singularity. The non-perturbative effect is taken into account by using the non-relativistic effective theory. It is found that, due to the resonance effect, the annihilation cross section can be enhanced by several orders of magnitude, when the dark matter is heavier than 1 TeV. Even when it's mass is around 500 GeV, the cross section can be changed by factors. |
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