Study of $b\bar{b}$ production in $p+p$ collisions at $\sqrt{s} = 510$ GeV in the PHENIX experiment at RHIC

ORAL

Abstract

Heavy flavor quarks are an important probe of the initial state of the Quark Gluon Plasma formed in heavy-ion collisions. Bottom and charm quarks are produced early in the collision, primarily through hard interactions, and experience the full time evolution of the medium. Understanding bottom quark production in $p+p$ collisions gives a baseline reference for studying larger collision systems. The measurement of the $b\bar{b}$ cross section gives insight into $b$ quark production mechanisms which can directly test pQCD predictions. The $b\bar{b}$ signal can be isolated by taking advantages of $B^{0}$ oscillations in like-sign muon pairs with invariant mass of 5-10 GeV. Measuring like-sign dimuons within this mass range provides an enriched bottom signal with a minimal amount of open charm background and without any contributions from quarkonia or Drell-Yan pairs. $b\bar{b}$ will be measured through the semi-leptonic decay like-sign dimuon signal, in the rapidity range 1.2 $<|y|< $ 2.2 and at $\sqrt{s} = 510$ GeV from data recorded in 2013 at the PHENIX experiment. In this presentation, the status of the $b\bar{b}$ production study will be presented.

Authors

  • Tristan Haseler

    Georgia State Univ