Journal Articles Journal of High Energy Physics Year : 2009

A Re-analysis of Gravitino Dark Matter in the Constrained MSSM

Abstract

We re-consider the gravitino as dark matter in the framework of theConstrained MSSM. We include several recently suggested improvements on: (i)the thermal production of gravitinos, (ii) the calculation of the hadronicspectrum from NLSP decay and (iii) the BBN calculation including staubound-state effects. In most cases we find an upper bound on the reheatingtemperature $\treh\lsim {\rm a few}\times 10^7\gev$ from over-production of$^6{\rm Li}$ from bound state effects. We also find an upper limit on the staulifetime of $3\times10^4 \sec$, which is nearly an order of magnitude largerthan the simple limit $5\times 10^3 \sec$ often used to avoid the effect ofbound-state catalysis. The bound on $\treh$ is relaxed to $\lsim {\rm afew}\times 10^8\gev$ when we use a more conservative bound on ${^6}{\rmLi}/{^7}{\rm Li}$, in which case a new region at small stau mass at $\sim100\gev$ and much longer lifetimes opens up. Such a low stau mass region can beeasily tested at the LHC.

Dates and versions

hal-00378193 , version 1 (23-04-2009)

Identifiers

Cite

Sean Bailly, Ki-Young Choi, Karsten Jedamzik, Leszek Roszkowski. A Re-analysis of Gravitino Dark Matter in the Constrained MSSM. Journal of High Energy Physics, 2009, 05, pp.103. ⟨10.1088/1126-6708/2009/05/103⟩. ⟨hal-00378193⟩
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