Theoretical update of the semileptonic branching ratio of B mesons

E. Bagan; Patricia Ball; V. M. Braun; P. Gosdzinsky

doi:10.1016/0370-2693(94)01410-E

Theoretical update of the semileptonic branching ratio of B mesons

E. Bagan, Patricia Ball, V. M. Braun, P. Gosdzinsky

Department of Physics

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

123 Citations (Scopus)

Abstract

We reconsider the prediction of the semileptonic branching ratio of B mesons, using the recent calculation [E. Bagan et al., Nucl. Phys. B 432 (1994) 3] of the radiative corrections with account for finite quark masses in nonleptonic decays and taking into account 1 mb2 corrections. For the semileptonic branching ratio we obtain Bsl = (11.8 ± 1.6)% using pole quark masses and Bsl = (11.0 ± 1.9) % using running MS quark masses. The uncertainty is dominated by unknown higher order perturbative corrections. We conclude that the present accuracy of the theoretical analysis does not allow to state a significant disagreement with the experimental results. However, our re-analysis of the decay b → ccs yields an increase of (35 ± 11) % due to next-to-leading order corrections including mass dependent terms, which further emphasizes the problem of the average charm quark content of the final states in B decays. © 1995.

Original language	English
Pages (from-to)	362-368
Journal	Physics Letters B
Volume	342
Issue number	1-4
DOIs	https://doi.org/10.1016/0370-2693(94)01410-E
Publication status	Published - 12 Jan 1995

Access to Document

10.1016/0370-2693(94)01410-E

Cite this

@article{7353b7c0b6bf4c7cbfd50b859cdc6d66,

title = "Theoretical update of the semileptonic branching ratio of B mesons",

abstract = "We reconsider the prediction of the semileptonic branching ratio of B mesons, using the recent calculation [E. Bagan et al., Nucl. Phys. B 432 (1994) 3] of the radiative corrections with account for finite quark masses in nonleptonic decays and taking into account 1 mb2 corrections. For the semileptonic branching ratio we obtain Bsl = (11.8 ± 1.6)% using pole quark masses and Bsl = (11.0 ± 1.9) % using running MS quark masses. The uncertainty is dominated by unknown higher order perturbative corrections. We conclude that the present accuracy of the theoretical analysis does not allow to state a significant disagreement with the experimental results. However, our re-analysis of the decay b → ccs yields an increase of (35 ± 11) % due to next-to-leading order corrections including mass dependent terms, which further emphasizes the problem of the average charm quark content of the final states in B decays. {\textcopyright} 1995.",

author = "E. Bagan and Patricia Ball and Braun, {V. M.} and P. Gosdzinsky",

year = "1995",

month = jan,

day = "12",

doi = "10.1016/0370-2693(94)01410-E",

language = "English",

volume = "342",

pages = "362--368",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Theoretical update of the semileptonic branching ratio of B mesons

AU - Bagan, E.

AU - Ball, Patricia

AU - Braun, V. M.

AU - Gosdzinsky, P.

PY - 1995/1/12

Y1 - 1995/1/12

N2 - We reconsider the prediction of the semileptonic branching ratio of B mesons, using the recent calculation [E. Bagan et al., Nucl. Phys. B 432 (1994) 3] of the radiative corrections with account for finite quark masses in nonleptonic decays and taking into account 1 mb2 corrections. For the semileptonic branching ratio we obtain Bsl = (11.8 ± 1.6)% using pole quark masses and Bsl = (11.0 ± 1.9) % using running MS quark masses. The uncertainty is dominated by unknown higher order perturbative corrections. We conclude that the present accuracy of the theoretical analysis does not allow to state a significant disagreement with the experimental results. However, our re-analysis of the decay b → ccs yields an increase of (35 ± 11) % due to next-to-leading order corrections including mass dependent terms, which further emphasizes the problem of the average charm quark content of the final states in B decays. © 1995.

AB - We reconsider the prediction of the semileptonic branching ratio of B mesons, using the recent calculation [E. Bagan et al., Nucl. Phys. B 432 (1994) 3] of the radiative corrections with account for finite quark masses in nonleptonic decays and taking into account 1 mb2 corrections. For the semileptonic branching ratio we obtain Bsl = (11.8 ± 1.6)% using pole quark masses and Bsl = (11.0 ± 1.9) % using running MS quark masses. The uncertainty is dominated by unknown higher order perturbative corrections. We conclude that the present accuracy of the theoretical analysis does not allow to state a significant disagreement with the experimental results. However, our re-analysis of the decay b → ccs yields an increase of (35 ± 11) % due to next-to-leading order corrections including mass dependent terms, which further emphasizes the problem of the average charm quark content of the final states in B decays. © 1995.

U2 - 10.1016/0370-2693(94)01410-E

DO - 10.1016/0370-2693(94)01410-E

M3 - Article

SN - 0370-2693

VL - 342

SP - 362

EP - 368

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-4

ER -

Theoretical update of the semileptonic branching ratio of B mesons

Abstract

Access to Document

Fingerprint

Cite this