EPJ

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EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 4, 339-349
DOI 10.1007/s100529800754

Calculations of one-loop supersymmetric corrections
to large-ET jet cross sections

John Ellis1 - Douglas A. Ross2

1 Theoretical Physics Division, CERN, CH-1211 Geneva 23, Switzerland
2 Physics Department, University of Southampton, Southampton SO17 1BJ, United Kingdom

Received: 18 August 1997 / Published online: 20 February 1998

Abstract
We have calculated the one-loop supersymmetric corrections to the $2 \to 2$ parton scattering subprocesses ${\bar q} q \to {\bar q} q, {\bar q} q \to g g, g q \to g q$ and $g g \to g g$, including form-factor corrections and box diagrams with internal squarks and gluinos of arbitrary mass. In general, these exhibit cusps at the corresponding direct-channel sparticle thresholds. We use these calculations to make numerical estimates of the possible threshold effects at the Fermilab Tevatron collider and at the LHC, which depend on the rapidity range selected, but can be as large as a few percent. These effects are diluted in the integrated large-ET cross section, where they are negative.

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