Constraining R-parity violating couplings using dimuon data at Tevatron Run-II

Details Constraining R-parity violating couplings using dimuon data at Tevatron Run-II Constraining R-parity violating couplings using dimuon data at Tevatron Run-II

2004-04-29

arxiv.org/abs/hep-ph/0404261v2

Phys.Lett. B600 (2004) 231-238

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures,added minor clarifications,version to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2004.09.009

The dimuon plus dijet signal is analyzed in the top squark pair production at Tevatron Run-II experiment and the total event rate is compared with the existing dimuon data. This comparison rules out top squark mass upto 188(104) GeV for the branching fraction 100%(50%) of top squark decay into the muon plus quark via lepton number violating coupling. Interpretation of this limit in the framework of R-parity violating(RPV) SUSY model puts limit on relevant RPV coupling for a given top squark mass and other supersymmetric model parameters. If $\MST \lsim 180$ GeV we found that the RPV couplings are roughly restricted to be within $\sim 10^{-4}$ which is at the same ballpark value obtained from the neutrino data. The limits are very stringent for a scenario where top squarks appear to be the next lightest supersymmetric particles.

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