Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-07-30
Nucl.Phys.B842:414-474,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
71 pages, LaTeX, 18 figures. v2 matches published version (minor typos corrected, more references added)
Scientific paper
10.1016/j.nuclphysb.2010.09.009
We derive a factorization formula for the production of pairs of heavy coloured particles in hadronic collisions near the production threshold that establishes factorization of soft and Coulomb effects. This forms the basis for a combined resummation of Coulomb and soft corrections, including the non-trivial interference of the two effects. We develop a resummation formalism valid at NNLL accuracy using the momentum-space approach to soft gluon resummation. We present numerical results for the NLL resummed squark-antisquark production cross section at the LHC and Tevatron, including also the contribution of squark-antisquark bound states below threshold. The total correction on top of the next-to-leading order approximation is found to be sizeable, and amounts to (4-20)% in the squark mass region 200 GeV-3 TeV at the 14 TeV LHC. The scale dependence of the total cross section is also reduced.
Beneke Martin
Falgari Pietro
Schwinn Christian
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