Power corrections to event shapes and factorization
Power corrections to event shapes and factorization
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DOI：
10.1016/s0550-3213(99)00308-9
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发表时间：
1999-02
期刊：
影响因子：
--
通讯作者：
G.P.Korchemsky;G.Sterman
中科院分区：
文献类型：
--
作者：
G.P.Korchemsky;G.Sterman
We study power corrections to the differential thrust, heavy mass and related event shape distributions in e+e−annihilation, whose values, e, are proportional to jet masses in the two-jet limit, e → 0. The factorization properties of these differential distributions imply that they may be written as convulutions of non-perturbative “shape” functions, describing the emission of soft quanta by the jets, and resummed perturbative cross sections. The infrared shape functions are different for different event shapes, and depend on a factorization scale, but are independent of the center-of-mass energy Q. They organize all power corrections of the form 1 (eQ)n, for arbitrary n, and carry informationa on a class of uniersal matrix elements of the energy-momentum tensor in QCD, directly related to the energy-energy correlations.
