首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Gravitino dark matter in split supersymmetry with bilinear R-parity violation
Authors:Giovanna Cottin  Marco A Díaz  María José Guzmán  Boris Panes
Institution:1. Cavendish Laboratory, University of Cambridge, J.J. Thomson Ave, Cambridge, CB3 0HE, UK
2. Instituto de Física, Universidad Católica de Chile, Av. Vicu?a Mackenna, 4860, Santiago, Chile
3. Instituto de Astronomía y Física del Espacio, C.C. 67, Suc. 28, 1428, Buenos Aires, Argentina
4. Instituto de Física, Universidade de S?o Paulo, R. do Mat?o 187, S?o Paulo, SP, 05508-900, Brazil
Abstract:In Split-SUSY with BRpV we show that the Gravitino DM solution is consistent with experimental evidence as regards its relic density and life time. We arrive at this conclusion by performing a complete numerical and algebraic study of the parameter space, including constraints from the recently determined Higgs mass, updated neutrino physics, and BBN constraints on NLSP decays. The Higgs mass requires a relatively low Split-SUSY mass scale, which is naturally smaller than usual values for reheating temperature, allowing the use of the standard expression for the relic density. We include restrictions from neutrino physics with three generations, and we notice that the gravitino decay width depends on the atmospheric neutrino mass scale. We calculate the neutralino decay rate and find it consistent with BBN. We mention some implications on indirect DM searches.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号