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

Chakrabarti, Subhendu ; Guchait, Monoranjan ; Mondal, N. K. (2004) Constraining R-parity violating couplings using dimuon data at Tevatron Run-II Physics Letters B, 600 (3-4). pp. 231-238. ISSN 0370-2693

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.physletb.2004.09.009

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 mt1~≲180 GeV we found that the RPV couplings are roughly restricted to be within ∼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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Deposited On:31 Dec 2011 08:16
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