Study of singlet-triplet mixing via semileptonic decays

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JIANG Yue, WANG Guo-Li, WANG Tian-Hong and JU Wan-Li. Study of singlet-triplet mixing via semileptonic decays[J]. Chinese Physics C, 2013, 37(1): 013101. doi: 10.1088/1674-1137/37/1/013101
JIANG Yue, WANG Guo-Li, WANG Tian-Hong and JU Wan-Li. Study of singlet-triplet mixing via semileptonic decays[J]. Chinese Physics C, 2013, 37(1): 013101.  doi: 10.1088/1674-1137/37/1/013101 shu
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Received: 2012-03-02
Revised: 2012-04-05
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Study of singlet-triplet mixing via semileptonic decays

Abstract: The singlet-triplet mixing of 1P1-3P1 is studied via calculating the branching ratios of semileptonic decay Bs→Ds1lν and B→D1lν by means of the instantaneous Bethe-Salpeter method. Special attention is paid to the relativistic corrections, since they are large for the P-wave states. Using the Mandelstam Formalism, we compute the transition form factors not only in the high-energy lepton end-point region but also in the full Q2 region. And the non-perturbative QCD effects are taken care of in the overlapping integral over the relativistic wave functions of the initial and nial states.

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