Speaker
Sumit Basu
(Department of Atomic Energy (IN))
Description
We report the excitation energy dependence of specific heat ($c_{\rm v}$)
of hadronic matter at freeze-out in Au+Au and Cu+Cu collisions
at the Relativistic Heavy Ion Collider energies by
analyzing the published data on event-by-event mean transverse
momentum ($\langle p_{\rm{T}} \rangle$) distributions. The $\langle p_{\rm{T}} \rangle$~distributions in
finite $p_{\rm{T}}$~ranges are converted to distributions of effective
temperatures, and dynamical fluctuations in temperature are extracted by subtracting
widths of the corresponding mixed event distributions. The heat capacity
per particle at the kinetic freezeout surface is presented as a
function of collision energy, which
shows a sharp rise in $c_{\rm v}$~below \sNN~=~62.4~GeV.
We employ the Hadron Resonance Gas
(HRG) model to estimate $c_{\rm v}$~at the chemical and kinetic freezeout
surfaces. The experimental results are compared to the HRG and other
theoretical model calculations. HRG results show good agreement with
data. Model predictions for $c_{\rm v}$~at the Large Hadron Collider energy
are presented.
Primary author
Sumit Basu
(Department of Atomic Energy (IN))
Co-authors
Basanta Kumar Nandi
(IIT- Indian Institute of Technology (IN))
Sandeep Chatterjee
(Variable Energy Cyclotron Centre)
Tapan Nayak
(Department of Atomic Energy (IN))
