10 GeV dark matter candidates and cosmic-ray antiprotons

被引：40

作者：

Lavalle, Julien ^{[1
,2
]}

机构：

[1] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[2] Ist Nazl Fis Nucl, I-10125 Turin, Italy

来源：

PHYSICAL REVIEW D | 2010年 / 82卷 / 08期

关键词：

DIFFUSION-MODEL; PROPAGATION; CONSTRAINTS; SAMPLE;

D O I：

10.1103/PhysRevD.82.081302

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent measurements performed with some direct dark matter detection experiments, e. g. CDMS-II and CoGENT (after DAMA/LIBRA), have unveiled a few events compatible with weakly interacting massive particles. The preferred mass range is around 10 GeV, with a quite large spin-independent cross section of 10(-43) - 10(-41) cm(2). In this paper, we recall that a light dark matter particle with dominant couplings to quarks should also generate cosmic-ray antiprotons. Taking advantage of recent works constraining the Galactic dark matter mass profile on the one hand and on cosmic-ray propagation on the other hand, we point out that considering a thermal annihilation cross section for such low mass candidates very likely results in an antiproton flux in tension with the current data, which should be taken into account in subsequent studies.

引用

页数：4

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