• Chinese Physics C
  • Vol. 44, Issue 1, (2020)
Rui-Yu Zhou1、*, Lei Guo1、*, Hai-Bing Fu1、*, Wei Cheng1、*, and Xing-Gang Wu1、*
Author Affiliations
  • 1Department of Physics, Chongqing University1Department of Physics, Chongqing University, Chongqing 401331, China
  • 1Department of Physics, Guizhou Minzu University2Department of Physics, Guizhou Minzu University, Guiyang 550025, China
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    DOI: 10.1088/1674-1137/44/1/013101 Cite this Article
    Rui-Yu Zhou, Lei Guo, Hai-Bing Fu, Wei Cheng, Xing-Gang Wu. The semileptonic decay within the LCSR approach under heavy quark effective field theory *[J]. Chinese Physics C, 2020, 44(1): Copy Citation Text show less

    Abstract

    The heavy quark effective field theory (HQEFT) provides an effective way to deal with heavy meson decays. In this paper, we adopt two different correlators to derive the light-cone sum rules (LCSR) for the transition form factors (TFFs) in the framework of HQEFT. We label the two LCSR results as LCSR- and LCSR- , which stand for the conventional correlator and the right-handed correlator. We observe that the correlation parameter for the branching ratio is , implying a consistency of LCSRs with the other correlators. Furthermore, we obtain and . We also obtain and , both of which agree with the lattice QCD predictions. Thus, HQEFT provides a useful framework for studying B meson decays. Moreover, by using the right-handed correlator, the twist-2 terms are dominant in TFF , as their contribution is over ~97% in the whole region, while the large twist-3 uncertainty of the conventional correlator is greatly suppressed. Hence, the LCSR- predictions can be used to test the properties of the various models for the pion twist-2 distribution amplitudes.
    Rui-Yu Zhou, Lei Guo, Hai-Bing Fu, Wei Cheng, Xing-Gang Wu. The semileptonic decay within the LCSR approach under heavy quark effective field theory *[J]. Chinese Physics C, 2020, 44(1):
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