Virtual Photon Emission from Quark-Gluon Plasma
| dc.creator | Suryanarayana, S. V. | |
| dc.date | 2007-04-27 | |
| dc.date | 2007-04-28 | |
| dc.date.accessioned | 2026-07-07T10:59:48Z | |
| dc.date.available | 2026-07-07T10:59:48Z | |
| dc.description | We recently proposed an empirical approach for the Landau-Pomeranchuk-Migdal (LPM) effects in photon emission from the quark gluon plasma as a function of photon mass. This approach was based on Generalized Emission Functions (GEF) for photon emission, derived at a fixed temperature and strong coupling constant. In the present work, we have extended the LPM calculations for several temperatures and strong coupling strengths. The integral equations for (${\bf \tilde{f}(\tilde{p}_\perp)}$) and ($\tilde{g}({\bf \tilde{p}_\perp})$) are solved by the iterations method for the variable set \{$p_0,q_0,Q^2,T,α_s$\}, considering bremsstrahlung and $\bf aws$ processes. We generalize the dynamical scaling variables, $x_T$, $x_L$, for bremsstrahlung and {\bf aws} processes which are now functions of variables $p_0,q_0,Q^2,T,α_s$. The GEF introduced earlier, $g^b_T$, $g^a_T$, $g^b_L$, $g^a_L$, are also generalized for any temperatures and coupling strengths. From this, the imaginary part of the photon polarization tensor as a function of photon mass and energy can be calculated as a one dimensional integral over these GEF and parton distribution functions in the plasma. However, for phenomenological studies of experimental data, one needs a simple empirical formula without involving parton momentum integrations. Therefore, we present a phenomenological formula for imaginary photon polarization tensor as a function of \{$q_0,Q^2,T,α_s$\} that includes bremsstrahlung and $\bf aws$ mechanisms along with LPM effects. | |
| dc.description | 8 pages 8 figures, phenomenological formulae for photon emission | |
| dc.identifier | https://arxiv.org/abs/0704.3676 | |
| dc.identifier | http://arxiv.org/abs/0704.3676 | |
| dc.identifier | Phys.Rev.C76:044903,2007 | |
| dc.identifier | doi:10.1103/PhysRevC.76.044903 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/187528 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Virtual Photon Emission from Quark-Gluon Plasma | |
| dc.type | text |