Regular Article - Theoretical Physics
form factors and the width effect from light-cone sum rules
School of Physics and Electronics, Hunan University, Changsha, 410082, People’s Republic of China
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Accepted: 6 June 2020
Published online: 18 June 2020
In this paper we calculate the 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 three-particle contributions are found to be individual, and totally they give about correction to certain form factors in the considered energy regions. We further explore the light-cone sum rules approach to study the wave form factors, the resonance model is proposed and the result shows that the background effect from accounts . As a by-product, we extract the strong coupling GeV with taking the form factors calculated previous under the narrow width approximation.
© The Author(s), 2020