Cosmic-ray antiproton constraints on light singlino-like dark matter candidates

被引：28

作者：

Cerdeno, David G. ^{[1
,2
]}

Delahaye, Timur ^{[1
]}

Lavalle, Julien ^{[1
,2
]}

机构：

[1] Univ Autonoma Madrid, Inst Fis Teor UAM CSIC, E-28049 Madrid, Spain

[2] Univ Autonoma Madrid, Dept Fis Teor UAM, E-28049 Madrid, Spain

来源：

NUCLEAR PHYSICS B | 2012年 / 854卷 / 03期

关键词：

Dark matter; Supersymmetry; Singlet extended MSSM; Direct detection; Indirect detection; Antimatter cosmic rays; SOLAR MODULATION; RELIC DENSITY; PROPAGATION; MODELS; PROBE; PARTICLES; NUCLEONS; SPECTRA; SEARCH; DRIVEN;

D O I：

10.1016/j.nuclphysb.2011.09.020

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The CoGeNT experiment, dedicated to direct detection of dark matter, has recently released excess events that could be interpreted as elastic collisions of similar to 10 GeV dark matter particles, which might simultaneously explain the still mysterious DAMA/LIBRA modulation signals, while in conflict with results from other experiments such as CDMS, XENON-100 and SIMPLE. It was shown that 5-15 GeV singlino-like dark matter candidates arising in singlet extensions of minimal supersymmetric scenarios can fit these data; annihilation then mostly proceeds into light singlet-dominated Higgs (pseudo-)scalar fields. We develop an effective Lagrangian approach to confront these models with the existing data on cosmic-ray antiprotons, including the latest PAMELA data. Focusing on a parameter space consistent with the CoGeNT region, we show that the predicted antiproton flux is generically in tension with the data whenever the produced (pseudo-)scalars can decay into quarks energetic enough to produce antiprotons, provided the annihilation S-wave is significant at freeze out in the early universe. In this regime, a bound on the singlino annihilation cross section is obtained, <sigma upsilon > less than or similar to 10(-26) cm(3)/s, assuming a dynamically constrained halo density profile with a local value of rho(circle dot) = 0.4 GeV/cm(3). Finally, we provide indications on how PAMELA or AMS-02 could further constrain or detect those configurations producing antiprotons which are not yet excluded. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：738 / 779

页数：42

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