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arXiv · hep-ph/0108190

Non-factorizable corrections and effective field theories

A. P. Chapovsky·V. A. Khoze·A. Signer·W. J. Stirling
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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.

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A. P. Chapovsky, V. A. Khoze, A. Signer, W. J. Stirling. 2001-08-23. Non-factorizable corrections and effective field theories. https://doi.org/10.1016/s0550-3213(01)00577-6

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