We study the impact of the recently computed mixed QCD-electroweak corrections to the production of W and Z bosons at the LHC on the value of the W mass extracted from the transverse momentum distribution of charged leptons from W decays. Using the average lepton transverse momenta in W and Z decays as simplified observables for the determination of the W mass, we estimate that mixed QCD-electroweak corrections can shift the extracted value of the W mass by up to O(20) MeV, depending on the kinematic cuts employed to define fiducial cross sections for Z and W production. Since the target precision of the W-mass measurement at the LHC is O(10) MeV, our results emphasize the need for fully differential computations of mixed QCD-electroweak corrections and a careful analysis of their potential impact on the determination of the W mass.

Estimating the impact of mixed QCD-electroweak corrections on the W -mass determination at the LHC / A. Behring, F. Buccioni, F. Caola, M. Delto, M. Jaquier, K. Melnikov, R. Röntsch. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 103:11(2021 Jun 07), pp. 113002.113002-1-113002.113002-6. [10.1103/PhysRevD.103.113002]

Estimating the impact of mixed QCD-electroweak corrections on the W -mass determination at the LHC

R. Röntsch
Ultimo
2021

Abstract

We study the impact of the recently computed mixed QCD-electroweak corrections to the production of W and Z bosons at the LHC on the value of the W mass extracted from the transverse momentum distribution of charged leptons from W decays. Using the average lepton transverse momenta in W and Z decays as simplified observables for the determination of the W mass, we estimate that mixed QCD-electroweak corrections can shift the extracted value of the W mass by up to O(20) MeV, depending on the kinematic cuts employed to define fiducial cross sections for Z and W production. Since the target precision of the W-mass measurement at the LHC is O(10) MeV, our results emphasize the need for fully differential computations of mixed QCD-electroweak corrections and a careful analysis of their potential impact on the determination of the W mass.
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
7-giu-2021
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/903673
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