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

Subhendu Chakrabarti·Monoranjan Guchait·N. K. Mondal
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Abstract

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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Subhendu Chakrabarti, Monoranjan Guchait, N. K. Mondal. 2004-09-25. Constraining R-parity violating couplings using dimuon data at Tevatron Run-II. https://doi.org/10.1016/j.physletb.2004.09.009

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