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Λ b → Λ c form factors from QCD light-cone sum rules
Ist Teil von
Chinese physics C, 2022-11, Vol.46 (11), p.113107
Erscheinungsjahr
2022
Link zum Volltext
Quelle
Free E-Journal (出版社公開部分のみ)
Beschreibungen/Notizen
Abstract
In this study, we calculate the transition form factors of
decaying into
within the framework of light-cone sum rules with the distribution amplitudes (DAs) of the
-baryon. In the hadronic representation of the correlation function, we isolate both the
and
states so that the
form factors can be obtained without ambiguity. We investigate the P-type and A-type currents to interpolate light baryons for comparison because the interpolation current for the baryon state is not unique. We also employ three parametrization models for the DAs of
in the numerical calculation. We present the numerical predictions for the
form factors and branching fractions, averaged forward-backward asymmetry, averaged final hadron polarization, and averaged lepton polarization of the
decays, as well as the ratio of the branching ratios
. The predicted
is consistent with LHCb data.