Heavy baryonic Λ b → Λη(′) decays

M. R. Ahmady, Choong Sun Kim, Sechul Oh, Chaehyun Yu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We calculate the branching ratios of the hadronic Λb decays to η and η′ in the factorization approximation where the form factors are estimated via QCD sum rules and the pole model. Our results indicate that, contrary to B→Kη(′) decays, the branching ratios for Λb→Λη and Λb→Λη′ are more or less the same in the hadronic Λb transitions. We find that the anomaly contribution is crucial in Λb→Λη(′) decays. We obtain the branching ratio of Λb→Λη(′) to be 11.47(11.33)×10-6 in QCD sum rules, and 2.95(3.24)×10-6 in the pole model. We also consider the contribution of the charm content in the η′ production in Λb→Λ transition.

Original languageEnglish
Pages (from-to)203-210
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume598
Issue number3-4
DOIs
Publication statusPublished - 2004 Sep 30

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sum rules
decay
poles
quantum chromodynamics
factorization
form factors
anomalies
approximation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

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abstract = "We calculate the branching ratios of the hadronic Λb decays to η and η′ in the factorization approximation where the form factors are estimated via QCD sum rules and the pole model. Our results indicate that, contrary to B→Kη(′) decays, the branching ratios for Λb→Λη and Λb→Λη′ are more or less the same in the hadronic Λb transitions. We find that the anomaly contribution is crucial in Λb→Λη(′) decays. We obtain the branching ratio of Λb→Λη(′) to be 11.47(11.33)×10-6 in QCD sum rules, and 2.95(3.24)×10-6 in the pole model. We also consider the contribution of the charm content in the η′ production in Λb→Λ transition.",
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Heavy baryonic Λ b → Λη(′) decays. / Ahmady, M. R.; Kim, Choong Sun; Oh, Sechul; Yu, Chaehyun.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 598, No. 3-4, 30.09.2004, p. 203-210.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Heavy baryonic Λ b → Λη(′) decays

AU - Ahmady, M. R.

AU - Kim, Choong Sun

AU - Oh, Sechul

AU - Yu, Chaehyun

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N2 - We calculate the branching ratios of the hadronic Λb decays to η and η′ in the factorization approximation where the form factors are estimated via QCD sum rules and the pole model. Our results indicate that, contrary to B→Kη(′) decays, the branching ratios for Λb→Λη and Λb→Λη′ are more or less the same in the hadronic Λb transitions. We find that the anomaly contribution is crucial in Λb→Λη(′) decays. We obtain the branching ratio of Λb→Λη(′) to be 11.47(11.33)×10-6 in QCD sum rules, and 2.95(3.24)×10-6 in the pole model. We also consider the contribution of the charm content in the η′ production in Λb→Λ transition.

AB - We calculate the branching ratios of the hadronic Λb decays to η and η′ in the factorization approximation where the form factors are estimated via QCD sum rules and the pole model. Our results indicate that, contrary to B→Kη(′) decays, the branching ratios for Λb→Λη and Λb→Λη′ are more or less the same in the hadronic Λb transitions. We find that the anomaly contribution is crucial in Λb→Λη(′) decays. We obtain the branching ratio of Λb→Λη(′) to be 11.47(11.33)×10-6 in QCD sum rules, and 2.95(3.24)×10-6 in the pole model. We also consider the contribution of the charm content in the η′ production in Λb→Λ transition.

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