Probing the Weak Mixing Angle at high energies at the LHC

28 Mar 2023, 15:00
20m
103AB (MSU Kellogg Center)

103AB

MSU Kellogg Center

Parallel talk WG3: Electroweak Physics and Beyond the Standard Model WG3

Speaker

Clara Del Pio (University of Pavia and INFN)

Description

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 $\overline{MS}$ renormalisation scheme, $\sin^2\theta_W(\mu)$.
Such a measurement can be used to test the Standard Model predictions for the $\overline{MS}$ 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 $\sin^2\theta_W(\mu)$ in the Powheg-Box Monte Carlo event generator, which we use to explore the potential of future analyses with the LHC Run3 and High-Luminosity datasets. In particular, the impact of higher order electroweak corrections and of the uncertainties due the knowledge of parton distribution functions are studied.

Submitted on behalf of a Collaboration? No

Primary authors

Alessandro Vicini (Università degli Studi e INFN Milano (IT)) Clara Del Pio (University of Pavia and INFN) Federico Vazzoler (Deutsches Elektronen-Synchrotron (DE)) Fulvio Piccinini (Pavia University and INFN (IT)) Katerina Lipka (Deutsches Elektronen-Synchrotron (DE)) Mauro Chiesa (INFN Sezione di Pavia) Simone Amoroso (Deutsches Elektronen-Synchrotron (DE))

Presentation materials