Distribution amplitudes of heavy-light mesons

Daniele Binosi; Lei Chang; Minghui Ding; Fei Gao; Joannis Papavassiliou; Craig D. Roberts

doi:10.1016/j.physletb.2019.01.033

Distribution amplitudes of heavy-light mesons

Daniele Binosi^*
, Lei Chang
, Minghui Ding
, Fei Gao
, Joannis Papavassiliou
, Craig D. Roberts

^*Corresponding author for this work

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

48 Citations (Scopus)

Abstract

A symmetry-preserving approach to the continuum bound-state problem in quantum field theory is used to calculate the masses, leptonic decay constants and light-front distribution amplitudes of empirically accessible heavy-light mesons. The inverse moment of the B-meson distribution is particularly important in treatments of exclusive B-decays using effective field theory and the factorisation formalism; and its value is therefore computed: λ_B(ζ=2GeV)=0.54(3)GeV. As an example and in anticipation of precision measurements at new-generation B-factories, the branching fraction for the rare B→γ(E_γ)ℓν_ℓ radiative decay is also calculated, retaining 1/m_B ² and 1/E_γ ² corrections to the differential decay width, with the result Γ_{B→γℓν_ℓ}/Γ_B=0.47(15) on E_γ>1.5GeV.

Original language	English
Pages (from-to)	257-262
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	790
DOIs	https://doi.org/10.1016/j.physletb.2019.01.033
Publication status	Published - 10 Mar 2019
Externally published	Yes

Keywords

B-meson decays
Heavy-light mesons
Nonperturbative continuum methods in quantum field theory
Parton distribution amplitudes
Quantum chromodynamics

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10.1016/j.physletb.2019.01.033

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title = "Distribution amplitudes of heavy-light mesons",

abstract = "A symmetry-preserving approach to the continuum bound-state problem in quantum field theory is used to calculate the masses, leptonic decay constants and light-front distribution amplitudes of empirically accessible heavy-light mesons. The inverse moment of the B-meson distribution is particularly important in treatments of exclusive B-decays using effective field theory and the factorisation formalism; and its value is therefore computed: λB(ζ=2GeV)=0.54(3)GeV. As an example and in anticipation of precision measurements at new-generation B-factories, the branching fraction for the rare B→γ(Eγ)ℓνℓ radiative decay is also calculated, retaining 1/mB 2 and 1/Eγ 2 corrections to the differential decay width, with the result ΓB→γℓνℓ /ΓB=0.47(15) on Eγ>1.5GeV.",

keywords = "B-meson decays, Heavy-light mesons, Nonperturbative continuum methods in quantum field theory, Parton distribution amplitudes, Quantum chromodynamics",

author = "Daniele Binosi and Lei Chang and Minghui Ding and Fei Gao and Joannis Papavassiliou and Roberts, \{Craig D.\}",

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doi = "10.1016/j.physletb.2019.01.033",

language = "English",

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

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TY - JOUR

T1 - Distribution amplitudes of heavy-light mesons

AU - Binosi, Daniele

AU - Chang, Lei

AU - Ding, Minghui

AU - Gao, Fei

AU - Papavassiliou, Joannis

AU - Roberts, Craig D.

PY - 2019/3/10

Y1 - 2019/3/10

N2 - A symmetry-preserving approach to the continuum bound-state problem in quantum field theory is used to calculate the masses, leptonic decay constants and light-front distribution amplitudes of empirically accessible heavy-light mesons. The inverse moment of the B-meson distribution is particularly important in treatments of exclusive B-decays using effective field theory and the factorisation formalism; and its value is therefore computed: λB(ζ=2GeV)=0.54(3)GeV. As an example and in anticipation of precision measurements at new-generation B-factories, the branching fraction for the rare B→γ(Eγ)ℓνℓ radiative decay is also calculated, retaining 1/mB 2 and 1/Eγ 2 corrections to the differential decay width, with the result ΓB→γℓνℓ /ΓB=0.47(15) on Eγ>1.5GeV.

AB - A symmetry-preserving approach to the continuum bound-state problem in quantum field theory is used to calculate the masses, leptonic decay constants and light-front distribution amplitudes of empirically accessible heavy-light mesons. The inverse moment of the B-meson distribution is particularly important in treatments of exclusive B-decays using effective field theory and the factorisation formalism; and its value is therefore computed: λB(ζ=2GeV)=0.54(3)GeV. As an example and in anticipation of precision measurements at new-generation B-factories, the branching fraction for the rare B→γ(Eγ)ℓνℓ radiative decay is also calculated, retaining 1/mB 2 and 1/Eγ 2 corrections to the differential decay width, with the result ΓB→γℓνℓ /ΓB=0.47(15) on Eγ>1.5GeV.

KW - B-meson decays

KW - Heavy-light mesons

KW - Nonperturbative continuum methods in quantum field theory

KW - Parton distribution amplitudes

KW - Quantum chromodynamics

UR - https://www.scopus.com/pages/publications/85060453948

U2 - 10.1016/j.physletb.2019.01.033

DO - 10.1016/j.physletb.2019.01.033

M3 - Article

AN - SCOPUS:85060453948

SN - 0370-2693

VL - 790

SP - 257

EP - 262

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

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

ER -

Distribution amplitudes of heavy-light mesons

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Keywords

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