Home > Research > Publications & Outputs > Precise study of the Z/gamma* boson transverse ...

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

Research output: Contribution to journalJournal article

Published
Article number 122001 26/03/2011 Physical Review Letters 12 106 7 Published English

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.