Power Counting and Modes in SCET

Abstract

We present a formulation of soft-collinear effective theory (SCET) in the two-jet sector as a theory of decoupled sectors of QCD coupled to Wilson lines. The formulation is manifestly boost-invariant, does not require the introduction of ultrasoft modes at the hard matching scale Q, and has manifest power counting in inverse powers of Q. The spurious infrared divergences which arise in SCET when ultrasoft modes are not included in loops disappear when the overlap between the sectors is correctly subtracted, in a manner similar to the familiar zero-bin subtraction of SCET. We illustrate this approach by analyzing deep inelastic scattering in the endpoint region in SCET and comment on other applications.

31 pages, 7 figure

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Cited by in corpus (11)

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• Factorization of Power Corrections in the Drell-Yan Process in EFT
• Disentangling observable dependence in SCETI and SCETII anomalous dimensions: angularities at two loops
• Chiral Perturbation Theory Reflections on Effective Theories of the Standard Model
• Rapidity Logarithms in SCET Without Modes
• Factorization at subleading power in deep inelastic scattering in the $x\to 1$ limit
• Simulating collider physics on quantum computers using effective field theories
• The Simplest B Decay, Precisely