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Polarization in B_c -> J/ψmu nu

Myoung-Taek Choi·Jae Kwan Kim
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Abstract

We study the polarization of the J/ψmeson of the B_c -> J/ψmu nu decay process, followed by J/ψ-> mu+ mu-, with the help of the heavy-quark spin symmetry formalism (HQSS). We adapt the ISGW wave function. Due to the clean signature of the decay mode, measurements of the polarization of the J/ψmeson can play a special role in extracting |V_{cb}|, the quark mixing-matrix element. We compare the results with the predictions of other quark models.

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Myoung-Taek Choi, Jae Kwan Kim. 1998-05-26. Polarization in B_c -> J/ψmu nu. https://arxiv.org/abs/hep-ph/9805456

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