Publicação: Precise study of the Z/γ* boson transverse momentum distribution in pp̄ collisions using a novel technique
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Using 7.3fb-1 of pp̄ collisions collected by the D0 detector at the Fermilab Tevatron, we measure the distribution of the variable φη*, which probes the same physical effects as the Z/γ* 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 φη* 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. © 2011 American Physical Society.
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Physical Review Letters, v. 106, n. 12, 2011.
