TY - JOUR
T1 - Gravitino dark matter in split supersymmetry with bilinear R-parity violation
AU - Cottin, Giovanna
AU - Díaz, Marco A.
AU - Guzmán, María José
AU - Panes, Boris
N1 - Funding Information:
We would like to thank Michael Grefe for his very helpful comments. This work was partly funded by Conicyt grant 1100837, Anillo ACT1102 and the Conicyt Magister and Doctorate Fellowship Becas Chile Programmes. GC also was funded by the postgraduate Conicyt-Chile Cambridge Scholarship. BP also was supported by the State of São Paulo Research Foundation (FAPESP) and the German Research Foundation (DFG). MJG also was supported by a postgraduate fellowship from CONICET.
Publisher Copyright:
© 2014, The Author(s).
PY - 2014/11/15
Y1 - 2014/11/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84919903416&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-014-3138-2
DO - 10.1140/epjc/s10052-014-3138-2
M3 - Article
AN - SCOPUS:84919903416
SN - 1434-6044
VL - 74
SP - 1
EP - 17
JO - European Physical Journal C
JF - European Physical Journal C
IS - 11
M1 - 3138
ER -