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Soft gluon radiation and energy dependence of total hadronic cross sections

Godbole, RM and Grau, A and Pancheri, G and Srivastava, YN (2005) Soft gluon radiation and energy dependence of total hadronic cross sections. In: Physical Review D, 72 (7). 076001-1.

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An impact parameter representation for soft gluon radiation is applied to obtain both the initial decrease of the total cross section $\sigma_{tot}$ for proton-proton collisions as well as the later rise of $\sigma_{tot}$ with energy for both pp and $p\bar{p}$. The nonperturbative soft part of the eikonal includes only limited low energy gluon emission and leads to the initial decrease in the proton-proton cross section. On the other hand, the rapid rise in the hard, perturbative jet part of the eikonal is tamed into the experimentally observed mild increase by soft gluon radiation whose maximum energy rises slowly with energy.

Item Type: Journal Article
Publication: Physical Review D
Publisher: American Physical Society
Additional Information: Copyright for this article belongs to American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 22 Aug 2008
Last Modified: 19 Sep 2010 04:22
URI: http://eprints.iisc.ac.in/id/eprint/4424

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