Probing R-parity violating interactions from top quark polarization at LHC

Abstract

In minimal supersymmetric standard model, the R-parity violating interactions can induce anomalous top pair productions at the LHC through the t-channel process dRdR→tLtL by exchanging a slepton or the u-channel process dRdR→tRtR by exchanging a squark. Such top pair productions with certain chirality cause top quark polarization in the top pair events. We found that at the LHC, due to the large statistics, the statistical significance of the polarization observable and thus the probing ability for the corresponding R-parity violating couplings are much higher than at the Tevatron Upgrade.