Next-to-next-to-leading order τ+τ- production cross section close to threshold
نویسندگان
چکیده
منابع مشابه
Beam thrust cross section for Drell-Yan production at next-to-next-to-leading-logarithmic order.
At the LHC and Tevatron strong initial-state radiation (ISR) plays an important role. It can significantly affect the partonic luminosity available to the hard interaction or contaminate a signal with additional jets and soft radiation. An ideal process to study ISR is isolated Drell-Yan production, pp → Xℓ+ ℓ- without central jets, where the jet veto is provided by the hadronic event shape bea...
متن کاملNext-to-Next-to-Next-to-Leading Order QCD Prediction for the Top Antitop S-Wave Pair Production Cross Section Near Threshold in e(+)e(-) Annihilation.
We present the third-order QCD prediction for the production of top antitop quark pairs in electron-positron collisions close to the threshold in the dominant S-wave state. We observe a significant reduction of the theoretical uncertainty and discuss the sensitivity to the top quark mass and width.
متن کاملTop Quark Pair Production at Threshold: Complete Next-to-next-to-leading Order Relativistic Corrections
The complete next-to-next-to-leading order (i.e. O(v2), O(vαs) and O(αs)) relativistic corrections to the total photon mediated tt̄ production cross section at threshold are presented in the framework of nonrelativistic quantum chromodynamics. The results are obtained using semi-analytic methods and “direct matching”. The size of the next-to-next-to-leading order relativistic corrections is foun...
متن کاملHiggs-Boson production at hadron colliders: differential cross sections through next-to-next-to-leading order.
We present a calculation of the fully differential cross section for Higgs-boson production in the gluon fusion channel through next-to-next-to-leading order (NNLO) in perturbative QCD. We apply the method introduced in Phys. Rev. D 69, 076010 (2004)] to compute double real emission corrections. Our calculation permits arbitrary cuts on the final state in the reaction hh-->H+X. It can easily be...
متن کاملThreshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order
We calculate threshold soft-gluon corrections to total cross sections and transverse momentum distributions for bottom and charm quark production in fixed-target experiments, considering both pp and π−p interactions. We investigate the quality of the near threshold soft-gluon approximation at next-to-leading order (NLO) and calculate next-to-nextto-leading order (NNLO) corrections through next-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2001
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.64.053001