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

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

doi:10.1007/s002880050010

Dependence of |V_ub/V_cb| on Fermi momentum p_F in ACCMM model

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

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/V_cb| 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/V_cb| 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/V_cb| from ACCMM model is increased by a factor 1.81, and can give a good agreement with Isgur et al. model.

Original language	English
Pages (from-to)	107-112
Number of pages	6
Journal	Zeitschrift für Physik C: Particles and Fields
Volume	69
Issue number	1
DOIs	https://doi.org/10.1007/s002880050010
Publication status	Published - 1995 Dec

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1007/s002880050010

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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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T1 - Dependence of |V ub/Vcb| on Fermi momentum p F in ACCMM model

AU - Hwang, Dae Sung

AU - Kim, C. S.

AU - Namgung, Wuk

PY - 1995/12

Y1 - 1995/12

N2 - 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.

AB - 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/V_cb| on Fermi momentum p_F in ACCMM model

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