Within the framework of transverse-momentum-dependent factorization, we investigate for the first time the impact of a flavor-dependent intrinsic transverse momentum of quarks on the production of W± bosons in proton–proton collisions at s=7TeV . We estimate the shift in the extracted value of the W boson mass MW induced by different choices of flavor-dependent parameters for the intrinsic quark transverse momentum by means of a template fit to the transverse-mass and the lepton transverse-momentum distributions of the W -decay products. We obtain −6≤ΔMW+≤9MeV and −4≤ΔMW−≤3 MeV with a statistical uncertainty of ±2.5 MeV. Our findings call for more detailed investigations of flavor-dependent nonperturbative effects linked to the proton structure at hadron colliders.

Effect of flavor-dependent partonic transverse momentum on the determination of the W boson mass in hadronic collisions

Signori, Andrea
2019-01-01

Abstract

Within the framework of transverse-momentum-dependent factorization, we investigate for the first time the impact of a flavor-dependent intrinsic transverse momentum of quarks on the production of W± bosons in proton–proton collisions at s=7TeV . We estimate the shift in the extracted value of the W boson mass MW induced by different choices of flavor-dependent parameters for the intrinsic quark transverse momentum by means of a template fit to the transverse-mass and the lepton transverse-momentum distributions of the W -decay products. We obtain −6≤ΔMW+≤9MeV and −4≤ΔMW−≤3 MeV with a statistical uncertainty of ±2.5 MeV. Our findings call for more detailed investigations of flavor-dependent nonperturbative effects linked to the proton structure at hadron colliders.
2019
788
542
545
http://www.sciencedirect.com/science/journal/03702693
Nuclear and High Energy Physics
Bacchetta, Alessandro; Bozzi, Giuseppe; Radici, Marco; Ritzmann, Mathias; Signori, Andrea
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1869478
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