Precision measurements of W properties at LHC

TL;DR

This paper presents a novel, high-precision, data-driven method for measuring W boson properties at the LHC, enabling more accurate determination of the W mass and production spectrum.

Contribution

It introduces a new approach to measure the W transverse momentum spectrum with unprecedented detail, improving the precision of W property measurements.

Findings

Preliminary results on CMS Run 2 data show promising accuracy.

Method constrains W production directly from data, reducing model dependence.

Enhanced precision in W mass measurement potential.

Abstract

Exploiting the large number of collected events and the symmetries in the W production and decay at LHC, it is possible to measure the W double differential cross section of transverse momentum and rapidity and the angular coefficients. With the proposed method a determination of the integrated spectrum of transverse momentum of W bosons is possible with an unprecedented granularity and increased precision with respect to the state-of-the-art generators. This enables the possibility to perform a theory-agnostic measurement of the W mass with competitive uncertainty by constraining the W production directly on data. This paper shows preliminary results derived on a subset of events collected by CMS during Run 2, for an integrated luminosity of 36 fb-1.