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Effective theory approach to unstable particle production.

Beneke, M. and Chapovsky, A. P. and Signer, A. and Zanderighi, G. (2004) 'Effective theory approach to unstable particle production.', Physical review letters., 93 . 011602.


Using the hierarchy of scales between the mass M and the width Gamma of a heavy, unstable particle, we construct an effective theory that allows calculations for resonant processes to be systematically expanded in powers of the coupling alpha and Gamma/M. We illustrate the method by computing the next-to-leading order line shape of a scalar resonance in an Abelian gauge-Yukawa model.

Item Type:Article
Keywords:Effective field-theory, Gauge-invariance, Heavy quarks.
Full text:(NA) Not Applicable
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Publisher statement:© 2004 by The American Physical Society. All rights reserved.
Record Created:28 Apr 2008
Last Modified:05 Aug 2011 12:47

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