We investigate the lepton flavor violation processes p(p) → eμ + X induced by R-parity violating interactions at the Tevatron hadron collider. The theoretical calculation and Monte Carlo simulation demonstrate that ...We investigate the lepton flavor violation processes p(p) → eμ + X induced by R-parity violating interactions at the Tevatron hadron collider. The theoretical calculation and Monte Carlo simulation demonstrate that with a set of suitable cuts on experimental observables, one might be capable to reduce the standard model physical background to a controllable level so that the signals of R-parity violating interactions could be detected distinctively. Furthermore, clear sneutrino information can be abstracted from the purified event sample where other SUSY scalar quark "pollution" is heavily suppressed. We conclude that with a reasonable assumption of 10 fb-1 integrated luminosity, the experiments at the Tevatron machine would have potential to discover sneutrino in the region of mv(v) ≤ 400 GeV via lepton flavor violation eμ production channels, or extend the mass scale constraint up to mv(v) ≥ 550 GeV at 95% CL.展开更多
We investigate in detail the effects of R-parity lepton number violation on the decay ~↑b1→b~↑x1^0 in the R-parity violating minimal supersymmetric standard model (Rp-MSSM) under the present experimental constraint...We investigate in detail the effects of R-parity lepton number violation on the decay ~↑b1→b~↑x1^0 in the R-parity violating minimal supersymmetric standard model (Rp-MSSM) under the present experimental constraints on Rp parameters. In our numerical calculations we consider two cases of input parameters of the squark and slepton sectors, Msquark<Mslepton and Msquark>Mslepton, for comparison. The results show that the relative R-parity violating correction is not very sensitive to the mass of the lightest neutralino -0↑x1 and the degenerate R-parity violating coupling parameter λ2′, but strongly depends on Msquark, Mslepton, tan β and the degenerate R-parity violating coupling parameter λ1′. The relative correction is about -4～3% and can exceed -6% in some region of parameter space. Therefore, precise experiment analyses on the decay ~↑b1→b~↑x1^0 may provide a probe of the R-parity violation.展开更多
文摘We investigate the lepton flavor violation processes p(p) → eμ + X induced by R-parity violating interactions at the Tevatron hadron collider. The theoretical calculation and Monte Carlo simulation demonstrate that with a set of suitable cuts on experimental observables, one might be capable to reduce the standard model physical background to a controllable level so that the signals of R-parity violating interactions could be detected distinctively. Furthermore, clear sneutrino information can be abstracted from the purified event sample where other SUSY scalar quark "pollution" is heavily suppressed. We conclude that with a reasonable assumption of 10 fb-1 integrated luminosity, the experiments at the Tevatron machine would have potential to discover sneutrino in the region of mv(v) ≤ 400 GeV via lepton flavor violation eμ production channels, or extend the mass scale constraint up to mv(v) ≥ 550 GeV at 95% CL.
文摘We investigate in detail the effects of R-parity lepton number violation on the decay ~↑b1→b~↑x1^0 in the R-parity violating minimal supersymmetric standard model (Rp-MSSM) under the present experimental constraints on Rp parameters. In our numerical calculations we consider two cases of input parameters of the squark and slepton sectors, Msquark<Mslepton and Msquark>Mslepton, for comparison. The results show that the relative R-parity violating correction is not very sensitive to the mass of the lightest neutralino -0↑x1 and the degenerate R-parity violating coupling parameter λ2′, but strongly depends on Msquark, Mslepton, tan β and the degenerate R-parity violating coupling parameter λ1′. The relative correction is about -4～3% and can exceed -6% in some region of parameter space. Therefore, precise experiment analyses on the decay ~↑b1→b~↑x1^0 may provide a probe of the R-parity violation.
