Partons , Factorization and Resummation Tasi 95
نویسنده
چکیده
I review the treatment of high-energy QCD in Minkowski space, with an emphasis on factorization theorems as extensions of the operator product expansion. I discuss how the factorization properties of high-energy cross sections and amplitudes lead to evolution equations that resum large logarithms for two-scale problems. Based on seven lectures at the Theoretical Advanced Study Institute, QCD and Beyond, Boulder, Colorado, June 1995.
منابع مشابه
Resummation and power corrections for factorized cross sections‡
Threshold resummation for factorizable cross sections in hadron-hadron collisions has a number of applications and extensions. We discuss factorization scale dependence, resummation at nonleading power in the moment variable, and the implications of resummation for power corrections in the hard momentum scale. ‡ Talk presented at the “International Europhysics Conference on High Energy Physics”...
متن کاملar X iv : h ep - p h / 02 10 13 0 v 3 6 A pr 2 00 5 YITP - SB - 02 - 56 Multi - loop Amplitudes and Resummation ⋆
We explore the relation between resummation and explicit multi-loop calculations for QCD hard-scattering amplitudes. We describe how the factorization properties of amplitudes lead to the exponentiation of double and single poles at each order of perturbation theory. For these amplitudes, previously-observed relations between single and double poles in different 2 → 2 processes can now be inter...
متن کاملar X iv : h ep - p h / 02 10 13 0 v 1 8 O ct 2 00 2 YITP - SB - 02 - 56 Multi - loop Amplitudes and Resummation ⋆
We explore the relation between resummation and explicit multi-loop calculations for QCD hard-scattering amplitudes. We describe how the factorization properties of amplitudes lead to the exponentiation of double and single poles at each order of perturbation theory. For these amplitudes, previously-observed relations between single and double poles in different 2 → 2 processes can now be inter...
متن کاملar X iv : h ep - p h / 02 10 13 0 v 2 1 0 O ct 2 00 2 YITP - SB - 02 - 56 Multi - loop Amplitudes and Resummation ⋆
We explore the relation between resummation and explicit multi-loop calculations for QCD hard-scattering amplitudes. We describe how the factorization properties of amplitudes lead to the exponentiation of double and single poles at each order of perturbation theory. For these amplitudes, previously-observed relations between single and double poles in different 2 → 2 processes can now be inter...
متن کاملv 2 3 0 O ct 1 99 5 CCUTH - 95 - 02 Resummation of Large Corrections in Inclusive B Meson Decays
We show that the resummation technique developed recently for heavy-light systems and the conventional approach based on the factorization of Wilson loops are equivalent. The two methods lead to the same results of the resummation of large corrections in inclusive B meson decays.
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تاریخ انتشار 1995