Higher-order soft corrections to squark hadro-production
نویسنده
چکیده
We present new predictions for the total cross section of squark pair-production at Tevatron and LHC through next-to-next-to-leading order within the Minimal Supersymmetric Standard Model. The results are based on the numerically dominant soft corrections. They are exact in all logarithmically enhanced terms near threshold, include the Coulomb corrections at two loops and exact scale dependence. We translate the increased total cross section at next-to-next-to-leading order into improved exclusion limits for squark masses and we investigate the scale dependence as well as the sensitivity on the parton luminosity.
منابع مشابه
Squark and Gluino Hadroproduction
We review the theoretical status of squark and gluino hadroproduction and provide numerical predictions for all squark and gluino pair-production processes at the Tevatron and at the LHC, with a particular emphasis on proton-proton collisions at 7 TeV. Our predictions include next-to-leading order supersymmetric QCD corrections and the resummation of soft gluon emission at next-to-leading-logar...
متن کاملSquark and gluino production at the LHC
In this talk I report on recent results for resummed total cross sections in squark and gluino hadroproduction. In the limit of production threshold, the emission of soft gluons results in the appearence of large logarithmic corrections in the theoretical expressions. These corrections are resummed at next-to-leading-logarithmic accuracy and their effect on the predictions for squark and gluino...
متن کاملSupersymmetric particle production at hadron colliders
The theoretical status of MSSM particle production at the hadron colliders Tevatron and LHC is reviewed, including next-to-leading order supersymmetric QCD corrections. The higher-order corrections significantly reduce the theoretical uncertainty and lead to a rise of the lower bounds on supersymmetric particle masses, as demonstrated for the case of top-squark and gaugino pair production at th...
متن کاملSquark and Gluino Production at Hadron Colliders
We have determined the theoretical predictions for the cross-sections of squark and gluino production at pp̄ 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 impl...
متن کاملWeak corrections to gluon-induced top-antitop hadro-production
We calculate purely weak virtual one-loop corrections to the production cross section of topantitop pairs at the Large Hadron Collider via the gluon-gluon fusion subprocess. We find very small negative corrections to the total cross section, of order −0.3%, but significantly larger effects to the differential one, particularly in the transverse momentum distribution, of order −5% to −10% (in ob...
متن کامل