Abstract
In this paper, we study the transition form factors by using the light-cone sum rules within the framework of heavy quark effective field theory. We adopt a chiral current correlation function to do the calculation, the resultant transition form factors and are dominated by the contribution of -meson leading-twist distribution amplitude, while the contributions from less certain -meson twist-3 distribution amplitudes are greatly suppressed. At the largest recoil point, we obtain . By further extrapolating the transition form factors into all the physically allowable region with the help of the -series parametrization approach, we calculate the branching fractions with and , which gives .
- Received 8 February 2022
- Accepted 2 May 2022
DOI:https://doi.org/10.1103/PhysRevD.105.096013
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society