B→η(′)lν decays and the flavor-singlet form factors

C. S. Kim; Sechul Oh; Chaehyun Yu

doi:10.1016/j.physletb.2004.03.083

B→η^(′)lν decays and the flavor-singlet form factors

C. S. Kim, Sechul Oh, Chaehyun Yu

Department of Physics

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

15 Citations (Scopus)

Abstract

We study semileptonic decays B→η^(′)lν, taking into account the flavor-singlet contribution (F^singlet₊) to the B→η^(′) form factors, which arises from the two-gluon emission in a decaying B meson. It has been recently pointed out that, in addition to large weak annihilation effects, the unknown value of F ^singlet₊ prevents accurate theoretical estimates in the analysis of B→η′K decays in QCD factorization. We present a certain method to determine F^singlet₊ with a reasonable accuracy, using B→η^(′)lν and B→πlν decays. We also investigate the possible effect of F^singlet ₊ on the estimated branching ratios (BRs) for B→η ^(′)lν and find that the BR for B→η′lν is particularly sensitive to the effect of F^singlet₊.

Original language	English
Pages (from-to)	223-232
Number of pages	10
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	590
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2004.03.083
Publication status	Published - 2004 Jun 24

Bibliographical note

Funding Information:
We thank Y. Kwon for useful discussions. The work of C.S.K. was supported in part by CHEP-SRC Program, in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF. The work of S.O. was supported in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF, and by the Japan Society for the Promotion of Science (JSPS). The work of C.Y. was supported by Grant No. 2001-042-D00022 of the KRF.

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2004.03.083

Cite this

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title = "B→η(′)lν decays and the flavor-singlet form factors",

abstract = "We study semileptonic decays B→η(′)lν, taking into account the flavor-singlet contribution (Fsinglet+) to the B→η(′) form factors, which arises from the two-gluon emission in a decaying B meson. It has been recently pointed out that, in addition to large weak annihilation effects, the unknown value of F singlet+ prevents accurate theoretical estimates in the analysis of B→η′K decays in QCD factorization. We present a certain method to determine Fsinglet+ with a reasonable accuracy, using B→η(′)lν and B→πlν decays. We also investigate the possible effect of Fsinglet + on the estimated branching ratios (BRs) for B→η (′)lν and find that the BR for B→η′lν is particularly sensitive to the effect of Fsinglet+.",

author = "Kim, {C. S.} and Sechul Oh and Chaehyun Yu",

note = "Funding Information: We thank Y. Kwon for useful discussions. The work of C.S.K. was supported in part by CHEP-SRC Program, in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF. The work of S.O. was supported in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF, and by the Japan Society for the Promotion of Science (JSPS). The work of C.Y. was supported by Grant No. 2001-042-D00022 of the KRF.",

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AU - Kim, C. S.

AU - Oh, Sechul

AU - Yu, Chaehyun

N1 - Funding Information: We thank Y. Kwon for useful discussions. The work of C.S.K. was supported in part by CHEP-SRC Program, in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF. The work of S.O. was supported in part by Grant No. R02-2003-000-10050-0 from BRP of the KOSEF, and by the Japan Society for the Promotion of Science (JSPS). The work of C.Y. was supported by Grant No. 2001-042-D00022 of the KRF.

PY - 2004/6/24

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N2 - We study semileptonic decays B→η(′)lν, taking into account the flavor-singlet contribution (Fsinglet+) to the B→η(′) form factors, which arises from the two-gluon emission in a decaying B meson. It has been recently pointed out that, in addition to large weak annihilation effects, the unknown value of F singlet+ prevents accurate theoretical estimates in the analysis of B→η′K decays in QCD factorization. We present a certain method to determine Fsinglet+ with a reasonable accuracy, using B→η(′)lν and B→πlν decays. We also investigate the possible effect of Fsinglet + on the estimated branching ratios (BRs) for B→η (′)lν and find that the BR for B→η′lν is particularly sensitive to the effect of Fsinglet+.

AB - We study semileptonic decays B→η(′)lν, taking into account the flavor-singlet contribution (Fsinglet+) to the B→η(′) form factors, which arises from the two-gluon emission in a decaying B meson. It has been recently pointed out that, in addition to large weak annihilation effects, the unknown value of F singlet+ prevents accurate theoretical estimates in the analysis of B→η′K decays in QCD factorization. We present a certain method to determine Fsinglet+ with a reasonable accuracy, using B→η(′)lν and B→πlν decays. We also investigate the possible effect of Fsinglet + on the estimated branching ratios (BRs) for B→η (′)lν and find that the BR for B→η′lν is particularly sensitive to the effect of Fsinglet+.

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