Dependence of |V ub/Vcb| on Fermi momentum p F in ACCMM model

Dae Sung Hwang, Choong Sun Kim, Wuk Namgung

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The Gaussian width of Fermi momentum, p F, is the most important parameter of the ACCMM model, and its value is essential in the determination of |V ub/Vcb| because the experimental analysis is allowed only at the end-point region of inclusive semileptonic B-decay spectrum. We extract the value of |V ub/Vcb| as a function of p F. We also calculate the parameter p F in the relativistic quark model using the variational method, and obtain p F=0.54 GeV which is much larger than the commonly used value, ∼0.3 GeV, in experimental analyses. When we use p F=0.5 GeV instead of 0.3 GeV, the value of |V ub/Vcb| from ACCMM model is increased by a factor 1.81, and can give a good agreement with Isgur et al. model.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalZeitschrift für Physik C: Particles and Fields
Volume69
Issue number1
DOIs
Publication statusPublished - 1995 Dec 1

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Momentum
momentum
quark models
decay

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology (miscellaneous)

Cite this

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abstract = "The Gaussian width of Fermi momentum, p F, is the most important parameter of the ACCMM model, and its value is essential in the determination of |V ub/Vcb| because the experimental analysis is allowed only at the end-point region of inclusive semileptonic B-decay spectrum. We extract the value of |V ub/Vcb| as a function of p F. We also calculate the parameter p F in the relativistic quark model using the variational method, and obtain p F=0.54 GeV which is much larger than the commonly used value, ∼0.3 GeV, in experimental analyses. When we use p F=0.5 GeV instead of 0.3 GeV, the value of |V ub/Vcb| from ACCMM model is increased by a factor 1.81, and can give a good agreement with Isgur et al. model.",
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Dependence of |V ub/Vcb| on Fermi momentum p F in ACCMM model. / Hwang, Dae Sung; Kim, Choong Sun; Namgung, Wuk.

In: Zeitschrift für Physik C: Particles and Fields, Vol. 69, No. 1, 01.12.1995, p. 107-112.

Research output: Contribution to journalArticle

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