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Effective theory approach to unstable particle production

Beneke, M.; Chapovsky, A.P.; Signer, A.; Zanderighi, G.

Authors

M. Beneke

A.P. Chapovsky

A. Signer

G. Zanderighi



Abstract

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.

Citation

Beneke, M., Chapovsky, A., Signer, A., & Zanderighi, G. (2004). Effective theory approach to unstable particle production. Physical Review Letters, 93, https://doi.org/10.1103/physrevlett.93.011602

Journal Article Type Article
Publication Date 2004-07
Deposit Date Apr 28, 2008
Publicly Available Date Mar 28, 2024
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 93
DOI https://doi.org/10.1103/physrevlett.93.011602
Keywords Effective field-theory, Gauge-invariance, Heavy quarks.

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