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| Probing quark gluon plasma through the radial flow of the thermal electromagnetic radiations |
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| Content: |
It has been shown that the transverse momentum ($p_T$) distribution of
the thermal photons and the lepton pairs may be used simultaneously
to estimate the radial velocity of different phases of the matter formed
in nuclear collisions at ultra-relativistic energies. The kinematic
variables {\it e.g.,} the invariant mass of lepton pairs(M) and
the $p_T$ can be chosen judiciously to estimate the flow velocities
in the partonic and hadronic phases of the evolving matter. We observe a
non-monotonic variation of the flow velocity with invariant mass of
the lepton pair which is indicative of two different thermal sources
at early and late stages of the dynamically evolving system for SPS,
RHIC and LHC energies. Various inputs required for the theoretical
calculations have been constrained from the experimental data wherever
available. Within the ambit of the present analysis we argue that the
variation of the radial velocity with invariant mass is indicative of a
phase transition from initially produced partons to hadrons at SPS and RHIC
energies. |
| Id: |
110 |
| Place: |
Room: Main Auditorium |
| Starting date: |
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| Duration: |
00' |
| Primary Authors: |
Mr. NAYAK, JAJATI KESARI (VARIABLE ENERGY CYCLOTRON CENTRE) |
| Co-Authors: |
Ms. MOHANTY, Payal (Variable Energy Cyclotron Centre)
Dr. ALAM, Jan-e (Variable Energy Cyclotron Centre) |
| Presenters: |
Mr. NAYAK, JAJATI KESARI |
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Last modified: 21 April 2011 05:02