Speaker
Description
The Standard Model (SM) of particle physics lies at the foundation of our current understanding of all experimental phenomena. Despite the huge success of this theory, it contains poorly understood features. In an attempt to account for these issues, various models beyond the SM (BSM) have been considered. The SM effective field theory (SMEFT) is a useful tool to parametrize BSM effects since there has been no conclusive evidence for new particles beyond the anticipated spectrum. In the SMEFT framework, one builds higher-dimensional operators using the existing SM fields and introduces Wilson coefficients as effective couplings. In this study, we restrict our attention to dimension-6 semi-leptonic four-fermion operators and investigate how neutral-current parity-violating deep-inelastic-scattering asymmetries at the Electron-Ion Collider (EIC) can probe these possible BSM effects. Our analysis shows that the EIC can offer probes competitive with the ones coming from LHC Drell-Yan data, simultaneously resolving degeneracies observed in neutral-current Drell-Yan measurements. Constraints on the semi-leptonic four-fermion Wilson coefficients become significantly stronger with a 10-fold luminosity upgrade. The EIC, designed as a QCD machine, promises strong potential as a probe of BSM physics, complementary to the LHC.
