$$\bar{B}_s \rightarrow f_0(980)$$ form factors and the width effect from light-cone sum rules

Abstract

In this paper we calculate theB s → f 0 (980) form factors from light-cone sum rules with B meson DAs. With adopting the quark-antiquark configuration of light scalar mesons, the high twist two-particle and the threeparticle contributions are found to be ∼ 25% individual, and totally they give about 50% correction to certain form factors in the considered energy regions. We further explore the lightcone sum rules approach to study the S−waveB s → K K form factors, the f 0 + f 0 + f 0 resonance model is proposed and the result shows that the background effect from f 0 + f 0 accounts ∼ 5%. As a by-product, we extract the strong coupling |g f 0 K K | = 1.08 +0.05 −0.14 GeV with taking thē B s → f 0 (980) form factors calculated previous under the narrow width approximation.

Chiral dynamics and S-wave contributions in $${\bar{B}}^0/D^0 \rightarrow \pi ^{\pm }\eta \ l^{\mp } \nu $$ decays

“…Following the method from Refs. [38,39] and with the constraint of Eq. (28), instead of directly using the numerical result in Fig.…”

“…For the detailed calculation procedure we follow Refs. [38,39], where the transitions form factors for B → (ρ → ππ) and B s → ( f 0 (980) → K K ) were calculated.…”

Resonant contributions to three-body B(s)→[D(*),Li1, Yan2, Rui3 et al. 2020Phys. Rev. D100110View full textAdd to dashboardCite

“…In Ref. [127], the authors calculated theB s → f 0 ð980Þ form factor from the light-cone sum rules with Bmeson DAs, and investigated the S-waveB s → KK form factors to study the width effect, where the f 0 ð980Þ is dominated by thess configuration. Ratios of decay rates of B and/or B s mesons into J=ψ plus f 0 ð980Þ or f 0 ð500Þ were proposed to allow for an extraction of the flavor mixing angle and to probe the tetraquark nature of those mesons within a certain model [128,129].…”

Resonant contributions to three-body $$B\rightarrow KKK$$ decays in perturbative QCD approach

“…Some decays such as B 0 → K S K S K S mediated by the flavour-changing neutral-current b → s transition provide a sensitive probe of the effect of new physics beyond SM. Motivated by the experimental results, many theoretical studies of various three-body non-leptonic B decays have been performed in different frameworks, such as approaches based on the symmetry principles [33][34][35][36][37], the QCD factorization (QCDF) [38][39][40][41][42][43][44][45][46], the perturbative QCD approach (PQCD) , and other theoretical methods [72][73][74][75][76].…”