Electroweak symmetry breaking and singlino dark matter with deflected anomaly mediation

被引：2

作者：

Yokozaki, Norimi ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Sci, Hiroshima 7398526, Japan

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2009年 / 05期

关键词：

Supersymmetry Breaking; Supergravity Models; NMSSM; PROGRAM; MASSES; MODEL;

D O I：

10.1088/1126-6708/2009/05/095

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 investigate the phenomenology of the Nearly Minimal Supersymmetric Standard Model (nMSSM) in the deflected anomaly mediation scenario. We also include the Fayet-Iliopoulos D-term of the standard model gauge group. In the nMSSM, the mu term is replaced by the vacuum expectation value of the gauge singlet; therefore, there is no difficulty in generating the B-term of the SUSY breaking scale. Although the messenger sector is introduced, direct couplings between nMSSM fields and messenger sector fields are forbidden by the discrete symmetry. Therefore, the phenomenology at the weak scale does not depend on the detail of the messenger sector. We show that there are regions of parameter space in which electroweak symmetry breaking occurs successfully and the lightest Higgs is heavier than the LEP bound. We show that the gluino is light in this scenario. The lightest neutralino, which is mainly composed of a singlino, is a candidate for dark matter. The relic density explains the observed abundance of dark matter. The dark matter-nucleon scattering cross section satisfies the current limit from CDMS and XENON10 with a small value for the strange quark content of a nucleon.

引用

页数：23

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