qq' -> qq': a second look at the IR divergences
| dc.creator | Konar, Sushan | |
| dc.creator | Ganguly, Avijit Kumar | |
| dc.date | 1997-06-14 | |
| dc.date.accessioned | 2026-07-07T04:01:57Z | |
| dc.date.available | 2026-07-07T04:01:57Z | |
| dc.description | The transport properties of the quark-gluon plasma is important both from the point of view of the astrophysical systems and the heavy ion collisions. Therefore, accurate calculations of the elastic scattering cross-sections of $qq' \to qq'$ and $ q\qbar' \to q\qbar'$ processes are required. At the tree-diagram level exchange of massless gluons leads to divergent cross sections for such processes. An effective way to remove the infrared divergence is to introduce a Debye mass as an infrared regulator into the gluon propagator for the thermal gluons. In this work we find that at the two-gluon exchange level such a technique fails to remove the divergences. In a chiral symmetry broken phase the mass could be introduced following the standard procedure which cures the divergence. But in a chirally symmetric phase chiral invariant mass of the fermions needs to be considered. | |
| dc.description | 4 pages, latex, 1 figure | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9706360 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9706360 | |
| dc.identifier | Physics and Astrophysics of Quark-Gluon Plasma, ed. B. C. Sinha, D. K. Srivastava, Y. P. Viyogi, Narosa Publishing House (1998) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/47036 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | qq' -> qq': a second look at the IR divergences | |
| dc.type | text |