Semileptonic decays in the “PQCD+Lattice” approach *-Reference-Cited by-同舟云学术

Semileptonic decays in the “PQCD+Lattice” approach *

Published:2020-02-01 Issue:2 Volume:44 Page:023104
ISSN:1674-1137
Container-title:Chinese Physics C
language:
Short-container-title:Chinese Phys. C

Author:

Hu Xue-Qing,Jin Su-Ping,Xiao Zhen-Jun

Abstract

Abstract We study the semileptonic decays

using the PQCD factorization approach with the newly defined distribution amplitudes of the

meson and a new kind of parametrization for extrapolating the form factors which takes into account the recent lattice QCD results. We find the following main results: (a) the PQCD predictions of the branching ratios of the

decays are smaller by about 5%-16% when the lattice results are taken into account in the extrapolation of the relevant form factors; (b) the PQCD predictions of the ratio

and of the longitudinal polarization

are

and

; and (c) after including the lattice results, the theoretical predictions slightly change:

and

. The theoretical predictions of

agree with the measurements within the errors. The other predictions could be tested by the LHCb experiment in the near future.

Publisher

IOP Publishing

Subject

Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics

Link

https://iopscience.iop.org/article/10.1088/1674-1137/44/2/023104/pdf

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