Search for anomalous WWγ and WWZ couplings with polarized E-beam at the LHeC

Abstract

We examine the possibility of constraining the anomalous WWγ and WWZ couplings by measuring total cross sections of the ep → νeqγX and ep → νeqZX processes at the LHeC collider with the electron beam energy Ee = 60 GeV and Ee = 140 GeV. We consider the cases of unpolarized and polarized electron beams. The difference of the upper and lower bounds on the anomalous couplings, (δ Δκγ,δλγ) and (δ Δκz,δλz) are obtained as (0:990, 0:122) and (0:362, 0:012) without electron beam polarization at the beam energy of Ee = 140 GeV for an integrated luminosity of Lint = 100 fb-1, respectively. With the possibility of e-beam polarization, we obtain more improved results as (0:975, 0:118) and (0:285, 0:009) for (δ Δκγ,δλγ) and (δ Δκz,δλz), respectively. The results are found to be comparable with the current experimental limits obtained from two-parameter fits to the data collected in the lepton and hadron colliders. It is found that the limits on the anomalous couplings (Δκz,δλz) through the process ep → νeqZX at the LHeC can further improve the current experimental limits.