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

Dae Sung Hwang, C. S. Kim, Wuk Namgung

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


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
Issue number1
Publication statusPublished - 1995 Dec

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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