Search for Factorization-Suppressed $B\to {\chi }_c{K}^{(*)}$ Decays

We search for the factorization-suppressed decays $B\to {\chi }_{c0}{K}^{(*)}$ and $B\to {\chi }_{c2}{K}^{(*)}$, with ${\chi }_{c0}$ and ${\chi }_{c2}$ decaying into $J/\psi \gamma$, using a sample of $124\times {10}^6$ $B\overline{B}$ events collected with the BABAR detector at the PEP-II storage ring of the Stanford Linear Accelerator Center. We find no significant signal and set upper bounds for the branching fractions.

Figure 1

Distribution of $m_{{\ell }^{+}{\ell }^{-}\gamma }-m_{{\ell }^{+}{\ell }^{-}}$ for data, with NR subtraction for final states of the strange meson (a) $K^{+}{\pi }^{-}$, (b) $K_S^0{\pi }^0$, (c) $K_S^0$, (d) $K^{+}{\pi }^0$, (e) $K_S^0{\pi }^{+}$, and (f) $K^{+}$. The fit is described in the text. The arrows on plot (f) show the expected positions of the ${\chi }_{c0}$ and ${\chi }_{c2}$ peaks.