PQCD study of the [Formula Presented] and [Formula Presented] controversy in inclusive [Formula Presented] decays

Chia Hung V. Chang, We Fu Chang

Research output: Contribution to journalArticle

Abstract

We calculate the semileptonic branching fraction and charm yield from inclusive (Formula presented) decays using the formalism of perturbative QCD. For nonleptonic decays, we employ the modified factorization theorem, in which Wilson coefficients evolve with the characteristic scales of the decay modes. It is found that the decay rate of the single-charm mode (Formula presented) is enhanced, and a lower (Formula presented) is obtained without increasing (Formula presented) This conclusion differs from the usual one, where the (Formula presented) mode is increased. Our result for the (Formula presented) meson lifetime is also consistent with the data.

Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume58
Issue number9
DOIs
Publication statusPublished - 1998 Sep 30

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decay
factorization
decay rates
mesons
theorems
quantum chromodynamics
formalism
life (durability)
coefficients

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "We calculate the semileptonic branching fraction and charm yield from inclusive (Formula presented) decays using the formalism of perturbative QCD. For nonleptonic decays, we employ the modified factorization theorem, in which Wilson coefficients evolve with the characteristic scales of the decay modes. It is found that the decay rate of the single-charm mode (Formula presented) is enhanced, and a lower (Formula presented) is obtained without increasing (Formula presented) This conclusion differs from the usual one, where the (Formula presented) mode is increased. Our result for the (Formula presented) meson lifetime is also consistent with the data.",
author = "Chang, {Chia Hung V.} and Chang, {We Fu}",
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AU - Chang, Chia Hung V.

AU - Chang, We Fu

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Y1 - 1998/9/30

N2 - We calculate the semileptonic branching fraction and charm yield from inclusive (Formula presented) decays using the formalism of perturbative QCD. For nonleptonic decays, we employ the modified factorization theorem, in which Wilson coefficients evolve with the characteristic scales of the decay modes. It is found that the decay rate of the single-charm mode (Formula presented) is enhanced, and a lower (Formula presented) is obtained without increasing (Formula presented) This conclusion differs from the usual one, where the (Formula presented) mode is increased. Our result for the (Formula presented) meson lifetime is also consistent with the data.

AB - We calculate the semileptonic branching fraction and charm yield from inclusive (Formula presented) decays using the formalism of perturbative QCD. For nonleptonic decays, we employ the modified factorization theorem, in which Wilson coefficients evolve with the characteristic scales of the decay modes. It is found that the decay rate of the single-charm mode (Formula presented) is enhanced, and a lower (Formula presented) is obtained without increasing (Formula presented) This conclusion differs from the usual one, where the (Formula presented) mode is increased. Our result for the (Formula presented) meson lifetime is also consistent with the data.

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