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Published on: November 15, 2013
Determination of the W-boson mass at hadron colliders
Luca Rottoli1, Paolo Torrielli2, Alessandro Vicini3
1Physik Institut, Universität Zürich, 8057 Zurich, Switzerland.
Abstract:
We introduce an observable relevant for the determination of the W-boson mass at hadron colliders. This observable is defined as an asymmetry around the jacobian peak of the charged-lepton transverse-momentum distribution in the charged-current Drell-Yan process. We discuss the observable's theoretical prediction, presenting results at different orders in QCD, and showing its perturbative stability. Its definition as a single scalar number and its linear sensitivity to allow a clean extraction of the latter and a straightforward discussion of the associated theoretical systematics: a perturbative QCD uncertainty of MeV on can be established by means of this observable, relying solely on charged-current Drell-Yan information. Owing to its relatively inclusive nature, the observable displays desirable properties also from the experimental viewpoint, especially for the unfolding of detector effects. We show that a measurement of this observable can lead to a competitive experimental error on at the LHC.
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