Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-10-25
Nucl.Phys.B492:51-103,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
60 pages, Latex2e, 24 figures (uses epsfig.sty)
Scientific paper
10.1016/S0550-3213(97)00084-9
We have determined the theoretical predictions for the cross-sections of squark and gluino production at $\ppb$ and $pp$ colliders (Tevatron and LHC) in next-to-leading order of supersymmetric QCD. By reducing the dependence on the renormalization/factorization scale considerably, the theoretically predicted values for the cross-sections are much more stable if these higher-order corrections are implemented. If squarks and gluinos are discovered, this improved stability translates into a reduced error on the masses, as extracted experimentally from the size of the production cross-sections. The cross-sections increase significantly if the next-to-leading order corrections are included at a renormalization/factorization scale near the average mass of the produced massive particles. This rise results in improved lower bounds on squark and gluino masses. By contrast, the shape of the transverse-momentum and rapidity distributions remains nearly unchanged when the next-to-leading order corrections are included.
Beenakker Wim
H"opker R.
Spira Michael
Zerwas Peter M.
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