Jan-e Alam
Variable Energy Cyclotron Centre
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Jan-e Alam.
Annals of Physics | 2000
Jan-e Alam; Subir Sarkar; Pradip Kumar Roy; T. Hatsuda; Bikash Sinha
Abstract The formulation of the real and virtual photon production rate from strongly interacting matter is presented in the framework of finite temperature field theory. The changes in the hadronic spectral function induced by temperature are discussed within the ambit of the Walecka type model, gauged linear and non-linear sigma models, hidden local symmetry approach, and QCD sum rule approach. The possibility of observing the direct thermal photon and lepton pairs from quark gluon plasma has been contrasted with those from hot hadronic matter with and without medium effects for various mass variation scenarios. At SPS energies, in-medium effects of different magnitude on the hadronic properties for the Walecka model, Brown–Rho scaling, and Nambu scaling scenarios are conspicuously visible through the low invariant mass distribution of dileptons and transverse momentum spectra of photons. However, at RHIC energies the thermal photon (dilepton) spectra originating from quark gluon plasma overshines those from hadronic matter for large transverse momentum (invariant mass) irrespective of the models used for evaluating the finite temperature effects on the hadronic properties. It is thus expected that at both RHIC and LHC energies the formation of quark gluon plasma in the initial stages may indeed turn out to be a realistic scenario.
Physics Reports | 1996
Jan-e Alam; Sibaji Raha; Bikash Sinha
Abstract In very energetic collisions of heavy ions, a novel state of matter — quark gluon plasma — is expected to be transiently formed. We review the suitability of electromagnetically interacting particles, dilepton pairs, single photons, diphotons, etc., as diagnostic tools for quark gluon plasma.
Physical Review D | 2005
Abhee K. Dutt-Mazumder; Jan-e Alam; Pradip Kumar Roy; Bikash Sinha
The partonic energy loss has been calculated taking both the hard and soft contributions for all the
Nuclear Physics | 1998
Subir Sarkar; Jan-e Alam; Pradip Kumar Roy; Abhee K. Dutt-Mazumder; Binayak Dutta-Roy; Bikash Sinha
2\ensuremath{\rightarrow}2
Physical Review C | 2003
Bedangadas Mohanty; Jan-e Alam
processes, revealing the importance of the individual channels. Cancellation of the intermediate separation scale has been exhibited. Subtleties related to the identical final state partons have properly been taken into account. The estimated collisional loss is compared with its radiative counter part. We show that there exists a critical energy (
Physical Review D | 2000
Abhijit Bhattacharyya; Bikash Sinha; Jan-e Alam; Subir Sarkar; Pradip Kumar Roy; Sibaji Raha; Pijushpani Bhattacharjee
{E}_{c}
Journal of Physics G | 2014
Santosh K. Das; Vinod Chandra; Jan-e Alam
) below which the collisional loss is more than its radiative counterpart. In addition, we present closed form formulas for both the collision probabilities and the stopping power (
Physical Review C | 2003
B. Mohanty; Jan-e Alam; Subir Sarkar; Tapan Kumar Nayak; Basanta K. Nandi
dE/dx
Nuclear Physics | 1999
Pradip Kumar Roy; Subir Sarkar; Jan-e Alam; Bikash Sinha
).
The Astrophysical Journal | 1999
Jan-e Alam; Sibaji Raha; Bikash Sinha
Abstract Temperature dependence of hadronic decay widths and masses are studied within the framework of an effective Lagrangian approach. At finite temperature the hadronic masses do not seem to follow a universal scaling law. Considering an exhaustive set of hadronic reactions and vector meson decays we have estimated the photon spectrum emitted from hot hadronic matter taking into account medium effects through thermal loop corrections on the hadronic decay widths and masses. An enhancement in photon emission rate is obtained when we use the in-medium masses of vector mesons in our calculations. It is observed that the effect of p decay width on the photon spectra is negligible.