Generalization of the Breit-Wigner Formu
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H.A. Weldon
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Article
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1993
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Elsevier Science
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English
β 266 KB
A formula is derived for the production rate of unstable particles that are produced in a thermalized region but whose decay products interact so weakly that they escape without thermalizing. The Bose-Einstein or Fermi-Dirac distribution is found to apply to unstable particles but modified by a Brei