Enhanced supersymmetric corrections to top-quark production at the Fermilab Tevatron
- Astroparticle Physics Group, Houston Advanced Research Center (HARC), The Mitchell Campus, The Woodlands, Texas 77381 (United States)
We calculate the one-loop supersymmetric electroweaklike and QCD-like corrections to the top-quark pair-production cross section at the Fermilab Tevatron, including the important effects of nondegenerate top squarks and left-right top squark mixing. The largest electroweaklike effects yield a negative shift in the cross section and are enhanced right below the threshold for top-quark decay into a top squark and Higgsinolike neutralino, and can be as large as {minus}35{percent}. The largest QCD-like effects are positive and are enhanced for light top squark masses, and can be as large as 20{percent}. Such shifts greatly exceed the present theoretical uncertainty in the standard model prediction, and, therefore, may be experimentally observable. We also explore the one-loop shifts in scenarios containing light top squarks and Higgsinolike neutralinos that have been recently proposed to explain various apparent experimental anomalies. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Texas A&M Research Foundation
- DOE Contract Number:
- FG05-91ER40633; FG05-92ER40717
- OSTI ID:
- 390443
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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