Abstract

In these proceedings, we present measurements of open bottom hadron production through multiple decay channels in Au + Au collisions at s NN = 200 GeV by the STAR experiment. Specifically, measurements of nuclear modification factors for electrons, J / ψ , and D 0 from open bottom hadron decays, enabled by the Heavy Flavor Tracker, are shown. A large suppression for non-prompt J / ψ and non-prompt D 0 are observed at high transverse momenta. On the other hand, there seems to be less suppression for electrons from bottom hadron decays than for those from charm hadron decays at ∼ 2 σ significance level.

Highlights

  • Heavy quarks are dominantly produced at early stages of relativistic heavy-ion collisions before the creation of the Quark-Gluon Plasma (QGP)

  • By comparing the yields of electrons from decays of heavy-flavor hadrons at large transverse momenta (p T ) in Au + Au collisions with those in p + p collisions at sNN = 200 GeV, a significant suppression has been observed [1]. This suppression is believed to be caused by the energy loss of heavy flavor quarks through interactions with the QGP, which is expected to be different for bottom and charm quarks because of their different masses [2]

  • Separate measurements of open bottom and charm hadron production in Au + Au collisions are crucial to test the mass hierarchy of parton energy loss in the QGP

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Summary

Introduction

Heavy quarks are dominantly produced at early stages of relativistic heavy-ion collisions before the creation of the Quark-Gluon Plasma (QGP). By comparing the yields of electrons from decays of heavy-flavor hadrons at large transverse momenta (p T ) in Au + Au collisions with those in p + p collisions at sNN = 200 GeV, a significant suppression has been observed [1]. This suppression is believed to be caused by the energy loss of heavy flavor quarks through interactions with the QGP, which is expected to be different for bottom and charm quarks because of their different masses [2]. Separate measurements of open bottom and charm hadron production in Au + Au collisions are crucial to test the mass hierarchy of parton energy loss in the QGP

Measurements of Bottom Production at STAR
Bottom Hadron Decay Electrons
Non-Prompt D0
Summary and Outlook
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