Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-05-28
Phys.Rev. D54 (1996) 4364-4373
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, LaTeX, 8 figures (included). Expanded version includes added clarifying remarks, more compact notation in some formu
Scientific paper
10.1103/PhysRevD.54.4364
We calculate the one-loop supersymmetric electroweak-like and QCD-like corrections to the top-quark pair-production cross section at the Tevatron, including the important effects of non-degenerate top-squarks and left-right top-squark mixing. The largest electroweak effects yield a negative shift in the cross section and are enhanced right below the threshold for top-quark decay into top-squark and higgsino-like neutralino, and can be as large as $-35\%$. The largest QCD effects are positive and are enhanced for light top-squark masses, and can be as large as $20\%$. 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 higgsino-like neutralinos that have been recently proposed to explain various apparent experimental anomalies.
Kim Jongsoo
Lopez Javier
Nanopoulos Dimitri
Rangarajan Raghavan
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