Speaker
Mr
Kinkar Saha
(Bose Institute)
Description
Strongly interacting matter at high temperatures and densities is expected to go through a phase transition from hadronic to Quark-Gluon-Plasma phase. It is quite interesting to comprehend signals of the same. From theoretical calculations, it is obvious that fractional charges carried by quarks gives rise to such a viable signal. This leads to construct a quantity, D-measure [1] which is the ratio of the net charge fluctuation to the total charge and is expected to provide a signature of the aforesaid transition.
To perceive the same, the behaviourial pattern of D [2] is studied with variation of temperature and chemical potential. The same is done, normalised by Dfree, which is the free massless but T and μ dependent limit of D. D always remains above its free field limit for all T and μB. With an input of temperature and chemical potential from particle multiplicities at the freeze-out surface in heavy ion collision experiments, one may get a flavour of D for different collision energies. This drives to discuss D vis-a-vis findings from the ALICE collaboration [3].
Our work is carried out within the framework of the Polyakov-Nambu-Jona-Lasinio (PNJL) model [4-7] and the results obtained show an encouraging similarity with that obtained from experiment.
[1] S. Jeon and V. Koch, Phys. Rev. Lett. 85, 2076 (2000)
[2] A. Bhattacharyya, S. Das, S.K.Ghosh, S. Raha, R. Ray, K. Saha and S. Upadhaya
arXiv:1212.6010v1 (2012)
[3] B. Abelev et. al. arXiv : 1207.6068 (2012)
[4] S. K. Ghosh, T. K. Mukherjee, M.G.Mustafa and R. Ray, Phys. Rev. D, 73, 114007 (2006)
[5] S. Mukherjee, M.G.Mustafa and R.Ray, Phys. Rev. D, 75, 094015 (2007)
[6] S.K.Ghosh, T.K.Mukherjee, M.G.Mustafa and R.Ray, Phys. Rev. D, 77, 094024 (2008)
[7] C. Ratti, M.A.Thaler and W.Weise, Phys. Rev. D, 73, 014019 (2006)
Primary author
Mr
Kinkar Saha
(Bose Institute)
Co-authors
Dr
Abhijit Bhattacharyya
(University of Calcutta)
Dr
Rajarshi Ray
(Bose Institute)
Prof.
Sanjay K. Ghosh
(Bose Institute)
Prof.
Sibaji Raha
(Bose Institute)
Ms
Sudipa Upadhaya
(Bose Institute)
Dr
Supriya Das
(Bose Institute)
