# Quark Matter 2018

May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Effect of field fluctuations on heavy mesons nuclear modification factor at LHC energies

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Open heavy flavour

### Speaker

Ashik Ikbal Sheikh (Department of Atomic Energy (IN))

### Description

The aim of the ongoing relativistic heavy-ion collision experiments is to explore the possible hot and dense deconfined state of QCD matter produced in such high energy collisions, the so called Quark-Gluon-Plasma (QGP). High energy partons (gluons, light quarks as well as heavy quarks) are produced in initial partonic sub-processes in the collisions between two heavy nuclei. Heavy quarks are mostly produced at the early stage of the collisions from the initial fusion of the partons which makes them a good probe to characterize the QGP. Immediately after their production, these heavy quarks will travel through the dense QGP medium and will start loosing energy during their path of travel. They lose energy in two different manners,one is by elastic collisions and another is by bremsstrahlung gluon radiations. These energy loss calculations are usually obtained by considering the QGP medium in an average manner and statistical field fluctuations of the QGP medium are ignored. The QGP being a statistical system of mobile color charge particles, one could characterize it by stochastic electromagnetic field fluctuations. The effect of this field fluctuations in the QGP leads to an energy gain of the travelling heavy quarks of all momenta and significant at the lower ones.

We have calculated the nuclear modification factor ($R_{AA}$ ) of heavy mesons by considering the collisional and radiative energy loss of heavy quarks along with the energy gain due to field fluctuations. Our results are in good agreement with the experimentally measured $R_{AA}$ of D and B mesons by ALICE and CMS experiments at $\sqrt{s_{NN}} = 2.76$ TeV and $\sqrt{s_{NN}} = 5.02$ TeV.

Centralised submission by Collaboration Presenter name will be specified later Theory

### Primary author

Ashik Ikbal Sheikh (Department of Atomic Energy (IN))

### Co-authors

Dr Zubayer Ahammed (Variable Energy Cyclotron Centre, Department of Atomic Energy,1/AF BidhanNagar, Kolkata-700064, India) Dr Munshi Golam Mustafa (Saha Institute of Nuclear Physics, 1/AF BidhanNagar, Kolkata-700064, India)