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Effective strong-coupling constant for timelikeQ 2 and charmonium decays

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Il Nuovo Cimento A (1965-1970)

Summary

The charmonium decay problem is re-examined by using effective strong-coupling constant for timelikeQ 2, analytically continued from that for spacelikeQ 2. Some discrepancies between theory and experiment are noted and resolved by introducing nonzero effective mass for the gluons in thes-channel. Also carried out is an analysis by using the next-to-leading-order formula for αs.

Riassunto

Il problema dei decadimenti del charmonio è riesaminato, utilizzando una costante di accoppiamento forte efficace perQ 2 tipo tempo, continuata analiticamente da quella perQ 2 tipo spazio. Alcune discrepanze tra teoria ed esperimento sono messe in evidenza e risolte, introducendo una massa efficace diversa da zero per i gluoni nel canales. Viene pure svolta un'analisi del problema utilizzando per la costante d'accoppiamento una formula all'ordine superiore.

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Author notes

  1. C. W. Kim

    Present address: Department of Physics, The Johns Hopkins University, 21218, Baltimore, Md.

Authors and Affiliations

  1. Istituto di Fisica Teorica dell'Università, Torino, Italia

    A. Bottino & C. W. Kim

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Italia

    C. W. Kim

Authors
  1. A. Bottino
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  2. C. W. Kim
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Additional information

Work supported in part by National Science Foundation.

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Bottino, A., Kim, C.W. Effective strong-coupling constant for timelikeQ 2 and charmonium decays. Nuov Cim A 57, 459–471 (1980). https://doi.org/10.1007/BF02776550

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  • DOI: https://doi.org/10.1007/BF02776550

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