Open Bottom Production in Au+Au Collisions at s NN = 200 GeV with the STAR Experiment

Shenghui Zhang

doi:10.1142/s2010194518600145

Abstract

In these proceedings, we present measurements of open bottom hadron production through multiple decay channels in Au+Au collisions at [Formula: see text] = 200 GeV by the STAR experiment. Namely, measurements of nuclear modification factors for electrons, [Formula: see text], and [Formula: see text] from open bottom hadron decays are shown. The decay products are topologically identified utilizing the Heavy Flavor Tracker, a silicon vertex detector installed at STAR during the period of 2014 - 2016. It enables precise reconstruction of displaced decay vertices. The results show large suppression for non-prompt [Formula: see text] and non-prompt [Formula: see text] at high transverse momenta, and indicate less suppression for electrons from bottom hadron decays than for those from charm hadron decays at [Formula: see text] significance level.

Highlights

Heavy quarks are predominantly produced at early stages of the relativistic heavyion collisions before the creation of the deconfined Quantum Chromodynamics (QCD) medium, known as the Quark-Gluon Plasma (QGP)
Transverse momenta in Au+Au = 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]
We present the STAR results of measurements of bottom hadron production via electron, J/ψ, and D0 decay channels in Au+Au collisions at √sNN = 200 GeV

Summary

Introduction

Heavy quarks are predominantly produced at early stages of the relativistic heavyion collisions before the creation of the deconfined Quantum Chromodynamics (QCD) medium, known as the Quark-Gluon Plasma (QGP). They subsequently traverse the created system throughout its evolution, and are suggested as an excellent probe for studying the properties of the QGP. This is an Open Access article published by World Scientific Publishing Company.

Experiment

Bottom decay electrons

Non-prompt D0

Summary and Outlook