Predictions for B_c decays to χ_{c1}(nP) using a covariant Bethe-Salpeter amplitude suggest the semileptonic μν mode is more promising than the π mode for probing the nature of χc1(3872).
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Improved covariant analysis of $B_c^+ \to \chi_{c1}(nP)$ decays and implications for the nature of $\chi_{c1}(3872)$
Predictions for B_c decays to χ_{c1}(nP) using a covariant Bethe-Salpeter amplitude suggest the semileptonic μν mode is more promising than the π mode for probing the nature of χc1(3872).