Threshold Resummation for QCD Hard Scattering
نویسنده
چکیده
We describe the resummation of singular distributions at partonic threshold in heavy quark production, generalizing results for Drell-Yan and other electroweak hard-scattering processes.
منابع مشابه
On the Resummation of Singular Distributions in QCD Hard Scattering
We discuss the resummation of distributions that are singular at the elastic limit of partonic phase space (partonic threshold) in QCD hard-scattering cross sections, such as heavy quark production. We show how nonleading soft logarithms exponentiate in a manner that depends on the color structure within the underlying hard scattering. This result generalizes the resummation of threshold singul...
متن کاملResummation in Heavy Quark and Jet Cross Sections
We discuss corrections from the elastic limit (partonic threshold) in hadronic hard-scattering cross sections. We show why these corrections can be large at all orders in perturbation theory, and describe their resummation to arbitrary logarithmic accuracy. In particular, we discuss the role of color exchange in the hard scattering. This enables us to generalize the resummation of the Drell-Yan...
متن کاملA new prescription for soft gluon resummation
We present a new prescription for the resummation of the divergent series of perturbative corrections, due to soft gluon emission, to hard processes near threshold in perturbative QCD (threshold resummation). This prescription is based on Borel resummation, and contrary to the commonly used minimal prescription, it does not introduce a dependence of resummed physical observables on the kinemati...
متن کاملJoint Resummation for Heavy Quark Production
1. Joint threshold and recoil resummation The formalism 1,2,3 of hadronic cross sections for the joint resummation of distributions singular at partonic threshold and at zero recoil has so far been applied to Z/W production 4, Higgs production 5, and prompt photon hadroproduction 6. For the latter 2 → 2 process, the formalism implements the notion that, in the presence of QCD radiation, the act...
متن کاملPrincipal Value Resummation
We present a new resummation formula for the Drell-Yan cross section. The formal resummation of threshold corrections in Drell-Yan hard-scattering functions produces an exponent with singularities from the infrared pole of the QCD running coupling. Our reformulation treats such ‘infrared renormalons’ by a principal value prescription, analogous to a modified Borel transform. The resulting expre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997