Possible solution to the $^7$Li problem by the long lived stau

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dc.creatorJittoh, Toshifumi
dc.creatorKohri, Kazunori
dc.creatorKoike, Masafumi
dc.creatorSato, Joe
dc.creatorShimomura, Takashi
dc.creatorYamanaka, Masato
dc.date2007-04-23
dc.date2007-12-21
dc.date.accessioned2026-07-07T11:20:21Z
dc.date.available2026-07-07T11:20:21Z
dc.descriptionModification of standard big-bang nucleosynthesis is considered in the minimal supersymmetric standard model to resolve the excessive theoretical prediction of the abundance of primordial lithium 7. We focus on the stau as a next-lightest superparticle, which is long lived due to its small mass difference with the lightest superparticle. It provides a number of additional decay processes of $\mathrm{^{7}Li}$ and $\mathrm{^{7}Be}$. A particularly important process is the internal conversion in the stau-nucleus bound state, which destroys the $\mathrm{^{7}Li}$ and $\mathrm{^{7}Be}$ effectively. We show that the modification can lead to a prediction consistent with the observed abundance of $\mathrm{^{7}Li}$.
dc.description6 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0704.2914
dc.identifierhttp://arxiv.org/abs/0704.2914
dc.identifierPhys.Rev.D76:125023,2007
dc.identifierdoi:10.1103/PhysRevD.76.125023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193932
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titlePossible solution to the $^7$Li problem by the long lived stau
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