Enhanced supersymmetric corrections to top-quark production at the Fermilab Tevatron

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.4364· OSTI ID:390443

Kim, J; Lopez, J L; Nanopoulos, D V; Rangarajan, R ^[1]

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1. 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

Related Subjects

66 PHYSICS
CORRECTIONS
CROSS SECTIONS
FERMILAB TEVATRON
NEUTRINOS
PAIR PRODUCTION
QUANTUM CHROMODYNAMICS
SPARTICLES
SUPERSYMMETRY
T QUARKS