Regular Article - Theoretical Physics
from the semileptonic decays of mesons
College of Science, National University of Defense Technology, Changsha, Hunan, 410073, People’s Republic of China
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Accepted: 9 May 2015
Published online: 27 May 2015
In the framework of heavy quark effective theory, the leading-order Isgur–Wise form factors relevant to semileptonic decays of the ground state meson into orbitally excited -wave mesons, including the newly observed narrow and states by the LHCb Collaboration, are calculated with the QCD sum rule method. With these universal form factors, the decay rates and branching ratios are estimated. We find that the decay widths are , , , and . The corresponding branching ratios are , , , and . The decay widths and branching ratios of corresponding semileptonic processes are also predicted.
© SIF and Springer-Verlag Berlin Heidelberg, 2015