Measurement of the ${\varphi }_{\eta }^{\ast }$ distribution of muon pairs with masses between 30 and 500 GeV in 10.4 fb${}^{-1}$ of $p\bar{p}$ collisions

Abstract

We present a measurement of the distribution of the variable ${\varphi }_{\eta }^{\ast }$ for muon pairs with masses between 30 and 500 GeV, using the complete Run II data set collected by the D0 detector at the Fermilab Tevatron proton-antiproton collider. This corresponds to an integrated luminosity of 10.4 fb${}^{-1}$ at $\sqrt{s}$ = 1.96 TeV. The data are corrected for detector effects and presented in bins of dimuon rapidity and mass. The variable ${\varphi }_{\eta }^{\ast }$ probes the same physical effects as the $Z/{\gamma }^{\ast }$ boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. These are the first measurements at any collider of the ${\varphi }_{\eta }^{\ast }$ distributions for dilepton masses away from the $Z\to {\ell }^{+}{\ell }^{-}$ boson mass peak. The data are compared to QCD predictions based on the resummation of multiple soft gluons.

arXiv commentAccepted for publication in Phys.Rev.D

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