Annihilation-type charmless radiative decays of B meson in non-universal Z′ model

Juan Hua, Choong Sun Kim, Ying Li

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We study charmless pure annihilation type radiative B decays within the QCD factorization approach. After adding the vertex corrections to the naive factorization approach, we find that the branching ratios of B̄d0 → φγ, B̄s0 → ρ0γ, B̄s0 → ωγ within the standard model are at the order of O(10-12), O(10-10), and O(10-11)respectively. The smallness of these decays in the standard model makes them sensitive probes of flavor physics beyond the standard model. To explore their physics potential, we have estimated the contribution of Z′ boson in the decays. Within the allowed parameter space, the branching ratios of these decay modes can be enhanced remarkably in the non-universal Z′ model: The branching ratios can reach to O(10-8) for B̄s0 → ρ0(ω)γ and O(10-10) for the B̄d0 → φγ, which are large enough for LHC-b and/or Super B-factories to detect those channels in near future. Moreover, we also predict large CP asymmetries in suitable parameter space. The observation of these modes could in turn help us to constrain the Z′ mass within the model.

Original languageEnglish
Pages (from-to)139-146
Number of pages8
JournalEuropean Physical Journal C
Volume69
Issue number1
DOIs
Publication statusPublished - 2010 Aug 3

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mesons
decay
factorization
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Flavors
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quantum chromodynamics
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Industrial plants
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  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "We study charmless pure annihilation type radiative B decays within the QCD factorization approach. After adding the vertex corrections to the naive factorization approach, we find that the branching ratios of B̄d0 → φγ, B̄s0 → ρ0γ, B̄s0 → ωγ within the standard model are at the order of O(10-12), O(10-10), and O(10-11)respectively. The smallness of these decays in the standard model makes them sensitive probes of flavor physics beyond the standard model. To explore their physics potential, we have estimated the contribution of Z′ boson in the decays. Within the allowed parameter space, the branching ratios of these decay modes can be enhanced remarkably in the non-universal Z′ model: The branching ratios can reach to O(10-8) for B̄s0 → ρ0(ω)γ and O(10-10) for the B̄d0 → φγ, which are large enough for LHC-b and/or Super B-factories to detect those channels in near future. Moreover, we also predict large CP asymmetries in suitable parameter space. The observation of these modes could in turn help us to constrain the Z′ mass within the model.",
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Annihilation-type charmless radiative decays of B meson in non-universal Z′ model. / Hua, Juan; Kim, Choong Sun; Li, Ying.

In: European Physical Journal C, Vol. 69, No. 1, 03.08.2010, p. 139-146.

Research output: Contribution to journalArticle

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