Sneutrino dark matter and the observed anomalies in cosmic rays

被引：30

作者：

Allahverdi, Rouzbeh ^{[2
]}

Dutta, Bhaskar ^{[3
]}

Richardson-McDaniel, Katherine ^{[2
]}

Santoso, Yudi ^{[1
]}

机构：

[1] Univ Durham, Dept Phys, Inst Particle Phys Phenomenol, Durham DH1 3LE, England

[2] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[3] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

来源：

PHYSICS LETTERS B | 2009年 / 677卷 / 3-4期

关键词：

B-L SYMMETRY; BREAKING;

D O I：

10.1016/j.physletb.2009.05.034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We revisit sneutrino dark matter in light of the recent results from the PAMELA and ATIC experiments. In the U(1)(B-L) extension of the minimal supersymmetric standard model the right-handed sneutrino is a natural candidate for thermal dark matter. Sneutrino annihilation at the present time can be considerably enhanced due to the exchange of the lightest field in the Higgs sector that breaks U(1)(B-L). The annihilation mainly produces taus (or muons) by the virtue of B - L charges. A sneutrino mass in the 1-2 TeV range provides a good fit to the PAMELA data and a reasonable fit to the ATIC data. Within this mass range the sneutrino-nucleon elastic scattering cross section is 10(-11)-10(-9) pb, which might be probed by upcoming and future direct detection experiments. In addition, if (at least) one of the neutrinos is dominantly a Dirac fermion, the sneutrino can provide a unified Picture of dark matter and inflation. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：172 / 178

页数：7

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