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16 April 2024 |
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Astrophysical Probes of Unification | | Asimina Arvanitaki
; Savas Dimopoulos
; Sergei Dubovsky
; Peter W. Graham
; Roni Harnik
; Surjeet Rajendran
; | | Date: |
Thu, 11 Dec 2008 18:54:54 GMT (1809kb,D) | | Abstract: | Traditional ideas for testing unification involve searching for the decay of
the proton and its branching modes. We point out that several astrophysical
experiments are now reaching sensitivities that allow them to explore
supersymmetric unified theories. In these theories the electroweak-mass DM
particle can decay, just like the proton, through dimension six operators with
lifetime ~ 10^26 sec. Interestingly, this timescale is now being investigated
in several experiments including ATIC, PAMELA, HESS, and Fermi. Positive
evidence for such decays may be opening our first direct window to physics at
the supersymmetric unification scale of M_GUT ~ 10^16 GeV, as well as the TeV
scale. Moreover, in the same supersymmetric unified theories, dimension five
operators can lead a weak-scale superparticle to decay with a lifetime of ~ 100
sec. Such decays are recorded by a change in the primordial light element
abundances and may well explain the present discord between the measured Li
abundances and standard big bang nucleosynthesis, opening another window to
unification. These theories make concrete predictions for the spectrum and
signatures at the LHC as well as Fermi. | | Source: | arXiv, 0812.2075 | | Services: | Forum | Review | PDF | Favorites | |
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