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SUMMARY:Diffusion of Heavy Quark in a hot and magnetic Quark Gluon Plasma-
 perturbative vs non perturbative
DTSTART;VALUE=DATE-TIME:20221116T093000Z
DTEND;VALUE=DATE-TIME:20221116T095000Z
DTSTAMP;VALUE=DATE-TIME:20261012T033224Z
UID:indico-contribution-725@events.vecc.gov.in
DESCRIPTION:Speakers: Surasree Mazumder (Indian Institute of Technology Ga
 ndhinagar)\nThe recent studies have indicated an existence of a strong mag
 netic field in non central Heavy Ion Collisions(HICs). Though strong to be
 gin with the field decays fast. It is still possible for the magnetic fiel
 d to exist in the thermalised Quark Gluon Plasma(QGP) depending on the ele
 ctrical conductivity of the medium. If a significant amount of magnetic fi
 eld is present in the medium\, it will affect various aspects. We have cal
 culated different diffusion coefficients of Heavy Quark(HQ)\, a very good 
 probe of QGP\, in presence of a strong magnetic field inside a hot QGP in 
 some of our recent works. It is well established that perturbative QCD des
 cription is not enough in order to explain certain experimental observatio
 ns at the low to intermediate $p_T$ region of HQ and at temperatures close
  to the critical temperature. There are various studies approaching the no
 n-perturbative calculation from various vantage points within the framewor
 k of perturbative QCD\, like T-matrix and potential approach. \nIn this pr
 esent work\, we have considered the complex HQ potential in presence of a 
 strong magnetic field in a hot QGP and posed it as effective gluon propaga
 tor. The part of the potential which is Yukawa type is responsible for the
  perturbative and the string part is responsible for the non-perturbative 
 contribution. We calculate the scattering rate of HQ interacting elastical
 ly with the medium light quarks/anti-quarks and gluons.and consequently\, 
 estimate the various diffusion coefficients for two cases: 1) HQ velocity 
 is along the direction of the magnetic field and 2) HQ velocity in the per
 pendicular direction to the magnetic field.\nWe have compared the perturba
 tive diffusion coefficients  with their non-perturbative counterparts in p
 resence of a strong magnetic field for the first time. Though the perturba
 tive contribution is always dominant over that due to non-perturbative\, t
 he difference between those two is lower at lower temperatures rendering t
 he non-perturbative estimation more important at the lower temperatures. A
 t higher temperatures\, the asymptotic freedom enhances perturbative contr
 ibution while the lower value of string tension (taken from finite tempera
 ture lattice calculations) or confinement reduces non-pertubative effect. 
 All these might have profound effect on various experimental observations.
 \n\nhttps://events.vecc.gov.in/event/18/contributions/725/
LOCATION:Ajay Divatia Lecture Hall\, VECC
URL:https://events.vecc.gov.in/event/18/contributions/725/
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