A Novel Technique for Studying the Z Boson Transverse Momentum Distribution at Hadron Colliders

Details A Novel Technique for Studying the Z Boson Transverse Momentum Distribution at Hadron Colliders A Novel Technique for Studying the Z Boson Transverse Momentum Distribution at Hadron Colliders

2008-07-30

arxiv.org/abs/0807.4956v1

Nucl.Instrum.Meth.A602:432-437,2009

Physics

High Energy Physics

High Energy Physics - Experiment

13 pages, 12 figures

Scientific paper

10.1016/j.nima.2009.01.203

We present a novel method for studying the shape of the Z boson transverse momentum distribution, Q_T, at hadron colliders in ppbar/pp -> Z/gamma* -> l^+l^-. The Q_T is decomposed into two orthogonal components; one transverse and the other parallel to the di-lepton thrust axis. We show that the transverse component is almost insensitive to the momentum resolution of the individual leptons and is thus more precisely determined on an event-by-event basis than the Q_T. Furthermore, we demonstrate that a measurement of the distribution of this transverse component is substantially less sensitive to the dominant experimental systematics (resolution unfolding and Q_T dependence of event selection efficiencies) reported in previous measurements of the Q_T distribution.

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