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Hide and Seek With Natural Supersymmetry at the LHC | | B. C. Allanach
; Ben Gripaios
; | | Date: |
29 Feb 2012 | | Abstract: | Gluinos that result in classic large missing transverse momentum signatures
at the LHC have been excluded by 2011 searches if they are lighter than around
800 GeV. This adds to the tension between experiment and supersymmetric
solutions of the naturalness problem, since the gluino is required to be light
if the electroweak scale is to be natural. Here, we examine natural scenarios
where supersymmetry is present, but was hidden from 2011 searches due to
violation of R-parity and the absence of a large missing transverse momentum
signature. Naturalness suggests that third generation states should dominate
gluino decays and we argue that this leads to a generic signature in the form
of same-sign, flavour-ambivalent leptons, without large missing transverse
momentum. As a result, searches in this channel are able to cover a broad range
of scenarios with some generality and one should seek gluinos that decay in
this way with masses below a TeV. We encourage the LHC experiments to tailor a
search for supersymmetry in this form. We consider a specific case that is good
at hiding: baryon number violation, and estimate that the most constraining
existing search from 2011 data implies a lower bound on the gluino mass of 550
GeV. | | Source: | arXiv, 1202.6616 | | Services: | Forum | Review | PDF | Favorites | |
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