Non-factorizable corrections and effective field theories

Abstract

We analyze the structure of higher-order radiative corrections for processes with unstable particles. By subsequently integrating out the various scales that are induced by the presence of unstable particles we obtain a hierarchy of effective field theories. In the effective field theory framework the separation of physically different effects is achieved naturally. In particular, we automatically obtain a separation of factorizable and non-factorizable corrections to all orders in perturbation theory. At one loop this treatment is equivalent to the double-pole approximation (DPA) but generalizes to higher orders and, at least in principle, to beyond the DPA. It is known that one-loop non-factorizable corrections to invariant mass distributions are suppressed at high energy. We study the mechanism of this suppression and obtain estimates of higher-order non-factorizable corrections at high energy.

45 pages

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Cited by in corpus (17)

• The automation of next-to-leading order electroweak calculations
• Narrow-width approximation accuracy
• Effective theory approach to unstable particle production
• Heavy Quark Pair Production near Threshold with Potential Non-Relativistic QCD
• Effective theory calculation of resonant high-energy scattering
• Narrow-width approximation limitations
• Four-fermion production near the W pair production threshold
• Inadequacy of zero-width approximation for a light Higgs boson signal
• Production-decay interferences at NLO in QCD for t-channel single-top production
• Dominant NNLO corrections to four-fermion production near the W-pair production threshold
• Off-shell effects for t-channel and s-channel single-top production at NLO in QCD
• Finite-width effects in unstable-particle production at hadron colliders
• Towards pair production near threshold with unstable particle effective theory
• Factorization in the model of unstable particles with continuous masses
• QCD Loop Corrections to Top Production and Decay at e^+ e^- Colliders
• Factorization effects in a model of unstable particles
• Unstable-particle effective field theory