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Lee, Christopher

Universal nonperturbative effects in event shapes from soft-collinear effective theory. (English) Zbl 1118.81530

Mod. Phys. Lett. A 22, No. 12, 835-851 (2007).
Summary: Two-jet event shape distributions, traditionally studied in the language of perturbative QCD, can be described naturally in soft-collinear effective theory. In this language, we demonstrate factorization of event shape distributions into perturbatively-calculable hard and jet functions and nonperturbative soft functions, and show how the latter contribute universal shifts to the mean values of various event shape distributions. Violations of universality in shifts of higher moments can give information on correlations of energy flow in soft radiation.

MSC:

81V35 Nuclear physics
81U05 \(2\)-body potential quantum scattering theory
81V05 Strong interaction, including quantum chromodynamics
81-02 Research exposition (monographs, survey articles) pertaining to quantum theory

Keywords:

jets; event shapes; factorization; power corrections; soft-collinear effective theory
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