Threshold resummation for pair production of coloured heavy sparticles at hadron colliders - High Energy Physics - PhenomenologyReportar como inadecuado




Threshold resummation for pair production of coloured heavy sparticles at hadron colliders - High Energy Physics - Phenomenology - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We derive a factorization formula for the production of pairs of heavycoloured particles in hadronic collisions near the production threshold thatestablishes factorization of soft and Coulomb effects. This forms the basis fora combined resummation of Coulomb and soft corrections, including thenon-trivial interference of the two effects. We develop a resummation formalismvalid at NNLL accuracy using the momentum-space approach to soft gluonresummation. We present numerical results for the NLL resummedsquark-antisquark production cross section at the LHC and Tevatron, includingalso the contribution of squark-antisquark bound states below threshold. Thetotal correction on top of the next-to-leading order approximation is found tobe sizeable, and amounts to 4-20% in the squark mass region 200 GeV-3 TeV atthe 14 TeV LHC. The scale dependence of the total cross section is alsoreduced.



Autor: Martin Beneke, Pietro Falgari, Christian Schwinn

Fuente: https://arxiv.org/







Documentos relacionados