PAMELA/ATIC anomaly from exotic mediated dark matter decay

被引：24

作者：

Bae, Kyu Jung ^{[1
]}

Kyae, Bumseok

机构：

[1] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 05期

基金：

新加坡国家研究基金会;

关键词：

Cosmology of Theories beyond the SM; Supergravity Models; Supersymmetric Standard Model; FLIPPED SU(5); ENERGIES;

D O I：

10.1088/1126-6708/2009/05/102

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：

We discuss dark matter decay mediated by exotically charged particles ("exotics") in a supersymmetric model with two dark matter (DM) components: one is the (bino-like) lightest supersymmetric particle (LSP) chi, and the other is a newly introduced meta-stable neutral singlet N. N decays to chi(e+)e(-) via a dimension 6 operator induced by a penguin-type one loop diagram with the life time of 10(26) sec., explaining energetic cosmic e(+/-) excess observed recently by PAMELA and ATIC/PPB-BETS. The superheavy masses of exotics (similar to 10(15-16) GeV) are responsible for the longevity of N. The superpartner of N develops the vacuum expectation value (VEV) of order TeV so that the DM N achieves the desired mass of 2TeV. By the VEV, the U(1)(R) symmetry is broken to the discrete Z(2) symmetry, which is identified with the matter parity in the minimal supersymmetric standard model (MSSM). Since we have the two DM components, even extremely small amount of N [O(10(-10)) less than or similar to (n(N)/n(chi))] could account for the observed positron flux with relatively light exotics' masses [10(12) GeV less than or similar to M-exo less than or similar to 10(16) GeV].

引用

页数：9

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