Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Probing the Weak Mixing Angle at high energies at the LHC

Jul 7, 2022, 12:05 PM
Room 4 (Rossa)

Room 4 (Rossa)

Parallel Talk Top quark and EW Physics Top quark and EW Physics


Federico Vazzoler (DESY CMS)


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 production at the Large Hadron Collider at large invariant dilepton masses to determine the scale dependence of the weak mixing angle in the MSbar renormalisation scheme, $sin^2\theta_W(\mu)$.
Such a measurement can be used to confirm the Standard Model predictions for the MSbar 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 a Monte Carlo event generator in Powheg-Box, which we use to explore the potential of future dedicated analyses with the LHC Run3 and High-Luminosity datasets.
In particular, we study the impact of higher order electroweak corrections and of uncertainties due the knowledge of parton distribution functions.

In-person participation Yes

Primary authors

Alessandro Vicini (Istituto Nazionale di Fisica Nucleare) Federico Vazzoler (DESY CMS) Simone Amoroso Clara Lavinia Del Pio (Istituto Nazionale di Fisica Nucleare) Fulvio Piccinini (Istituto Nazionale di Fisica Nucleare) Katerina Lipka (DESY) Mauro Chiesa (PV)

Presentation materials