Signatures of long-lived gluinos in split supersymmetry

By J. Hewett, B. Lillie, M. Masip, T. Rizzo. 2004

147 citations recorded by the source corpus.

The authors examine the experimental signatures for the production of gluinos at colliders and in cosmic rays within the split supersymmetry scenario. Unlike in the MSSM, the gluinos in this model are relatively long-lived due to the large value of the squark masses which mediate their decay. Searches at colliders are found to be sensitive to the nature of gluino fragmentation as well as the gluino-hadron interactions with nuclei and energy deposition as it traverses the detector. They find that the worst-case scenario, where a neutral gluino-hadron passes through the detector with little energy deposition, is well described by a monojet signature. For this case, using Run I data they obtain a bound of m{sub {bar g}} > 170 GeV; this will increase to 210(1100) GeV at Run II(LHC) if no excess events are observed. In the opposite case, where a charged gluino-hadron travels through the detector, a significantly greater reach is obtained via stable charged particle search techniques. The authors also examine the production of gluino pairs in the atmosphere by cosmic rays and show they are potentially observable at IceCube; this would provide a cross-check for observations at hadron colliders.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4b69d2f5049fc34c4ada8466536ef77703e203c7

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Citations in the corpus

Natural Dark Matter from an unnatural Higgs boson and new colored particles at the TeV scale (2007, background): “Examples like the one presented in this paper emphasize that the hierarchy problem is not the only motivation for Standard Model partners, and it is therefore important not only to ascertain the quantum numbers of TeV scale particles at the LHC but also to glean their purpose.”
A review of the mass measurement techniques proposed for the Large Hadron Collider (2010, background): “[90] J.”
Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector (2015, unknown): “supersymmetry [5,6], gluino (~ g) decay is suppressed by the high mass of the squarks.”
Mini-Split (2012, background): “The collider signals for such a decay have been studied extensively [39, 40] and there are already bounds for gluinos in Split [41–44] which place their mass above 1 TeV.”