Abstract
In this contribution we present an overview of recent results concerning the impact of a possible flavour dependence of the intrinsic quark transverse momentum on electroweak observables. In particular, we focus on the qT spectrum of electroweak gauge bosons produced in proton-proton collisions at the LHC and on the direct determination of the W boson mass. We show that these effects are comparable in size to other nonperturbative effects commonly included in phenomenological analyses and should thus be included in precise theoretical predictions for present and future hadron colliders.
Highlights
Electroweak precision observables are interesting benchmarks to test the limits of the Standard Model and to discriminate between different scenarios for new physics
The Standard Model prediction for the W boson mass from the global fit of the electroweak parameters [1] has a very small uncertainty that represents a natural target for the precision of the experimental measurements of mW at hadron colliders
In the region of the peak, instead, the dominant channels involve combinations of uVal, dVal, u, and d. We consider it important to study the impact of flavour-dependent effects on the production of electroweak bosons and on the determination of mW. In this contribution we give an overview of selected studies related to flavour-dependent effects, focusing in particular on the results obtained in [10, 11], showing that they can be nonnegligible compared to other sources of theoretical uncertainty and should be included in precision physics programs at hadron colliders
Summary
Electroweak precision observables are interesting benchmarks to test the limits of the Standard Model and to discriminate between different scenarios for new physics. In the region of the peak, instead, the dominant channels involve combinations of uVal, dVal, u, and d (where a = aVal + asea and a = asea) For this reason, we consider it important to study the impact of flavour-dependent effects on the production of electroweak bosons and on the determination of mW. We consider it important to study the impact of flavour-dependent effects on the production of electroweak bosons and on the determination of mW In this contribution we give an overview of selected studies related to flavour-dependent effects, focusing in particular on the results obtained in [10, 11], showing that they can be nonnegligible compared to other sources of theoretical uncertainty and should be included in precision physics programs at hadron colliders
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