STAR Measurements of Bottom to Charm Ratio and Heavy Quark Interaction with the QCD Medium through Non-Photonic Electron-Hadron Correlations

TL;DR

This paper reports measurements of bottom to charm quark ratios and heavy quark interactions with the QCD medium using non-photonic electron-hadron correlations at RHIC, providing insights into heavy quark production and energy loss.

Contribution

It provides new measurements of bottom and charm contributions to non-photonic electrons and the total bottom production cross section in p+p collisions, along with azimuthal correlations in Au+Au collisions.

Findings

Measured bottom to charm ratio in p+p collisions at 200 and 500 GeV.

Extracted total bottom quark production cross section at 200 GeV.

Analyzed non-photonic electron-hadron correlations in Au+Au collisions.

Abstract

We present STAR measurements of relative charm and bottom contributions to NPE from $p+p$ collisions at $\sqrt{s}$= 200 and 500 GeV energies. We report the total bottom quark production cross section from p+p collisions at $\sqrt{s}= 200$ GeV extracted from NPE spectrum and B to D ratios. We also present the NPE-hadron azimuthal correlations from $Au+Au$ collisions at $\sqrtsNN = 200$ GeV from the 2010 RHIC run where we have collected high statistics data set with low photonic conversion background.