Speaker
Ashik Ikbal Sheikh
(Variable Energy Cyclotron Centre, Department of Atomic Energy)
Description
The main goal of the ongoing relativistic heavy-ion collision experiments is to study the possible hot and dense deconfined state of QCD matter produced in such high energy collisions called Quark-Gluon-Plasma (QGP). In order to study the QGP, we need to probe it. High energy partons are produced in initial partonic subprocesses in the collisions between two heavy nuclei. The 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 study the QGP. Immediately after their production, these heavy quarks will travel through the dense QGP medium and will start loosing energy by elastic collisions and 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. Since the QGP is 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 D and B mesons by considering
the collisional and radiative energy loss of charm and beauty 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.
Teaser (will appear on the printed program)
Is the story of heavy mesons suppression complete without considering the energy gain by heavy quarks due to field fluctuations? We try to explore this issue.
Primary author
Ashik Ikbal Sheikh
(Variable Energy Cyclotron Centre, Department of Atomic Energy)
Co-authors
Prof.
Munshi Golam Mustafa
(Saha Institute of Nuclear Physics)
Dr
Zubayer Ahammed
(Variable Energy Cyclotron Centre, Department of Atomc Energy)
