# ICHEP 2016 Chicago

3-10 August 2016
Chicago IL USA
US/Central timezone
There is a live webcast for this event.

## Specific Heat of Matter Formed in Relativistic Nuclear Collisions

6 Aug 2016, 18:00
2h
Riverwalk A/B ()

### Riverwalk A/B

Poster Heavy Ions

### 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))

### Presentation Materials

There are no materials yet.
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