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.
N1 - Publisher Copyright:
© 2019
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 - http://www.scopus.com/inward/record.url?scp=85060453948&partnerID=8YFLogxK
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 -