The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 4 Issue 2 (1998) pp 339-349
DOI 10.1007/s100529800754

theoretical physics:
Calculations of one-loop supersymmetric corrections to large-$E_T$ jet cross sections

John Ellis (1), Douglas A. Ross (2)

(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-$E_T$ cross section, where they are negative.

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Online publication: June 23, 1998
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