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| The rho meson in hot hadronic matter and low mass dilepton spectra |
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| Content: |
The structure of the one loop self-energy graphs of the rho meson is
analyzed in the real time formulation of thermal field theory and
interaction vertices from chiral perturbation theory which is the low
energy effective theory of QCD. The discontinuities of these graphs
across the various branch cuts are evaluated. These contributions
are identified with the different sources of medium modifications
providing a unified description of such processes discussed in the
literature. An exhaustive set of mesonic and baryonic self energy
graphs up to mass 2 GeV and spin 3/2 is considered in the
calculation of the imaginary and real parts of the self energy. The
spectral function of the rho meson in hot and dense matter,
evaluated for finite values of the three momentum of the rho, is
seen to provide a large enhancement of lepton pair production
below the bare peak of the rho. The sensitivity of the effective
temperature obtained from the slopes of transverse momentum
spectra of dileptons to the medium effects is demonstrated at RHIC
and LHC energies. |
| Id: |
106 |
| Place: |
Room: Main Auditorium |
| Starting date: |
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| Duration: |
00' |
| Primary Authors: |
Mr. GHOSH, Sabyasachi (Variable Energy Cyclotron Centre) |
| Co-Authors: |
Dr. SARKAR, sourav (Variable Energy Cyclotron Centre)
Dr. MALLIK, Samir (Saha Institute of Nuclear Physics)
Dr. ALAM, Jane (Variable Energy Cyclotron Centre) |
| Presenters: |
Mr. GHOSH, Sabyasachi |
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Last modified: 21 April 2011 05:02