Effective theory approach to unstable particles

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The authors present a novel treatment of resonant massive particles appearing as intermediate states in high energy collisions. The approach uses effective field theory methods to treat consistently the instability of the intermediate resonant state. As a result gauge invariance is respected in every step and calculations can in principle be extended to all orders in perturbation theory, the only practical limitation in going to higher orders being the standard difficulties related to multi-loop integrals. The authors believe that the longstanding problem related to the treatment of instability of particles is now solved.

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185 Kilobytes pages

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Zanderighi, Giulia May 19, 2003.

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Description

The authors present a novel treatment of resonant massive particles appearing as intermediate states in high energy collisions. The approach uses effective field theory methods to treat consistently the instability of the intermediate resonant state. As a result gauge invariance is respected in every step and calculations can in principle be extended to all orders in perturbation theory, the only practical limitation in going to higher orders being the standard difficulties related to multi-loop integrals. The authors believe that the longstanding problem related to the treatment of instability of particles is now solved.

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185 Kilobytes pages

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  • XXXIX Rencontres de Moriond on Electroweak and Unified Interactions, La Thuille, Aosta Valley (IT), 03/21/2004--03/28/2004

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  • Report No.: FERMILAB-Conf-04/064-T
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 824007
  • Archival Resource Key: ark:/67531/metadc785149

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  • May 19, 2003

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  • Dec. 3, 2015, 9:30 a.m.

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  • Aug. 5, 2016, 11:50 a.m.

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Zanderighi, Giulia. Effective theory approach to unstable particles, article, May 19, 2003; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc785149/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.