Probing the weak mixing angle at high energy

2023/07/20 by Del Pio, Clara Lavinia, Amoroso, Simone, Chiesa, Mauro +4
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2307.10737

Abstract

The weak mixing angle is a probe of the vector-axial coupling structure of electroweak interactions. It has been measured precisely at the Z-pole by experiments at the LEP and SLD colliders, but its energy dependence above M_Z remains unconstrained. In this contribution we propose to exploit measurements of Neutral-Current Drell Yan at large invariant dilepton masses at the Large Hadron Collider, to determine the scale dependence of the weak mixing angle in the MS renormalisation scheme, sin² θ_w^MS(μ). Such a measurement can be used to test the Standard Model predictions for the MS running at TeV scales, and to set model-independent constraints on new states with electroweak quantum numbers. To this end, we present an implementation of sin² θ_w^MS(μ) in the POWHEG-BOX Monte Carlo event generator, which we use to explore the potential of future analyses with the LHC Run~3 and High-Luminosity datasets. In particular, the impact of the higher order corrections and of the uncertainties due to the knowledge of parton distribution functions are studied.

Related

• Probing the Weak Mixing Angle at high energies at the LHC
• Matching the Weak Mixing Angle at Low Energies
• Theory Driven Evolution of the Weak Mixing Angle
• Measurement of the effective weak mixing angle at the CEPC
• Determining Weak-Mixing Angle at μTRISTAN