Search for spontaneous R-parity violation at GeV and 189 GeV

Parity Violation in DIS at 12 GeV at JLab

In 1978, Prescott et al. [1] showed that parity-violating could be observed in neutral currents by measuring the asymmetry APV = (σR − σL)(σR + σL) in the deep inelastic scattering (DIS) of polarized electrons from deuterium. By extending the kinematic range, the same group later published results that were able to exclude alternative theories to the Standard Model that were considered reasonab...

Search for R-parity violation at LEP

Abstract. We discuss the present status of the searches for R-parity violation at LEP. The following topics are considered: pair-production of supersymmetric particles via λ , λ ′ or λ ′′ couplings, sneutrino single production and spontaneous Rparity breaking. No evidence of signal is found in the total data sample at centre-ofmass energies up to √ s = 208 GeV, with an integrated luminosity of ...

Searches for GMSB at √ s = 189 GeV at LEP

Searches for Gauge Mediated Supersymmetry Breaking topologies are performed on 170 pb−1 of data collected at a centre of mass energy of 188.6 GeV by each of the four LEP experiments. No evidence for such processes is found, allowing 95% C.L. lower limits to be set on the masses of various particles in the context of GMSB. In particular, it is found that the lightest neutralino must be heavier t...

Spontaneous R - Parity violation bounds

We investigate bounds from tree-level and one-loop processes in generic supersymmetric models with spontaneous R-parity breaking in the superpotential. We analyse the bounds from a general point of view. The bounds are applicable both for all models with spontaneous R-parity violation and for explicit bilinear R-parity violation based on general lepton-chargino and neutrino-neutralino mixings. ...

Sear h for supersymmetry with R { parity violation atps = 202 to 208 GeV