Beam Energy Scan of Specific Heat Through Temperature Fluctuations in Heavy Ion Collisions
Basu, S., Nandi, B. K., Chatterjee, S., Chatterjee, R., & Nayak, T. (2016). Beam Energy Scan of Specific Heat Through Temperature Fluctuations in Heavy Ion Collisions. In D. Alvarez-Castillo, D. Blaschke, V. Kekelidze, V. Matveev, & A. Sorin (Eds.), SQM 2015 : Proceedings of the 15th International Conference on Strangeness in Quark Matter. Journal of Physics: Conference Series, 668 (012043). Institute of Physics Publishing Ltd.. doi:10.1088/1742-6596/668/1/012043
Published inJournal of Physics: Conference Series;668
© the Authors, 2016. Published under licence by IOP Publishing Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY) licence.
Temperature fluctuations may have two distinct origins, first, quantum fluctuations that are initial state fluctuations, and second, thermodynamical fluctuations. We discuss a method of extracting the thermodynamic temperature from the mean transverse momentum of pions, by using controllable parameters such as centrality of the system, and range of the transverse momenta. Event-by-event fluctuations in global temperature over a large phase space provide the specific heat of the system. We present Beam Energy Scan of specific heat from data, AMPT and HRG model prediction. Experimental results from NA49, STAR, PHENIX, PHOBOS and ALICE are combined to obtain the specific heat as a function of beam energy. These results are compared to calculations from AMPT event generator, HRG model and lattice calculations, respectively.