Precise study of the Z/gamma* boson transverse momentum distribution in ppbar collisions using a novel technique

Abstract

Using 7.3 pb-1 of ppbar collisions collected by the D0 detector at the Fermilab Tevatron, we measure the distribution of the variable \phistar, which probes the same physical effects as the Z/gamma* boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. A QCD prediction is found to describe the general features of the \phistar distribution, but is unable to describe its detailed shape or dependence on boson rapidity. A prediction that includes a broadening of transverse momentum for small values of the parton momentum fraction is strongly disfavored.

12 pages, 3 figures

References in corpus (4)

• Implications of CTEQ global analysis for collider observables
• Measurement of the shape of the boson transverse momentum distribution in ppbar -> Z/gamma* -> ee+X events produced at sqrt{s}=1.96 TeV
• Optimisation of variables for studying dilepton transverse momentum distributions at hadron colliders
• A Novel Technique for Studying the Z Boson Transverse Momentum Distribution at Hadron Colliders

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