Prompt D0 meson vn harmonics in PbPb collisions at 5.02 TeV

Jian Sun

doi:10.1016/j.nuclphysbps.2017.05.047

Abstract

Due to large mass, heavy quarks are produced primarily at early stages of heavy-ion collisions, and therefore experience the full evolution of the system and carry information about the extent of thermalization of the QGP. Azimuthal anisotropy parameters (vn) of charm and bottom hadrons provide unique information about the path length dependent interactions between heavy quarks and the medium. To what extent heavy quarks at low pT flow with the medium is a good measure of the interaction strength. At high pT, v2 and v3 from path length dependent energy loss provide a powerful tool to study heavy quark energy loss mechanisms. With the large statistics PbPb samples at 5.02 TeV collected by the CMS detector during the 2015 LHC run, azimuthal anisotropy v2 and v3 of D0 meson is measured over a wide pT range and at different centralities. In this paper, the most recent results of prompt D0 meson vn parameters are presented, and compared to the charged hadron vn at the same energy and the latest theoretical calculations.

Highlights

Introduction the mediumWith 2011 PbPb data at 2.76 TeV, CMS has showed good performance in D0 reconstruction and measured prompt D0 RAA [4]
5.02 TeV collected by the CMS detector during the 2015 LHC run, azimuthal anisotropy v2 and v3 of D0 meson is measured over a wide pT range and at different centralities
Azimuthal anisotropy v2 and v3 of prompt D0 are measured as function of pT for centrality classes 010%, 10-30% and 30-50% with uncertainties from nonprompt D0 evaluated in a data-driven method

Summary

Introduction

Introduction the mediumWith 2011 PbPb data at 2.76 TeV, CMS has showed good performance in D0 reconstruction and measured prompt D0 RAA [4]. Azimuthal anisotropy parameters (vn ) of charm and bottom hadrons provide unique information about the path length dependent interactions between heavy quarks and the medium. 5.02 TeV collected by the CMS detector during the 2015 LHC run, azimuthal anisotropy v2 and v3 of D0 meson is measured over a wide pT range and at different centralities.

Results

Conclusion