Measurements of the Absolute Branching Fractions of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>±</mml:mo></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>±</mml:mo></mml:msup><mml:msub><mml:mi>X</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mover accent="true"><mml:mi>c</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:mrow></mml:msub></mml:math>
J. P. Lees, V. Poireau, V. Tisserand, E. Graugés, A. Palano, G. Eigen, D. N. Brown, Yu. G. Kolomensky, M. Fritsch, H. Koch, T. Vazquez Schroeder, R. Cheaib, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, V. E. Blinov, А. Р. Бузыкаев, V. P. Druzhinin, V. B. Golubev, E. A. Kozyrev, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, K. Yu. Todyshev, A. J. Lankford, B. Dey, J. W. Gary, O. R. Long, A. M. Eisner, W. S. Lockman, J. G. Panduro Vazquez, D. S. Chao, C. H. Cheng, B. Echenard, K. T. Flood, D. G. Hitlin, J. Kim, Y. Li, T. S. Miyashita, P. Ongmongkolkul, F. C. Porter, M. Röhrken, Z. Huard, B. Meadows, B. G. Pushpawela, M. D. Sokoloff, L. Sun, J. G. Smith, S. R. Wagner, D. Bernard, M. Verderi, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, V. Santoro, A. Calcaterra, R. de Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I. M. Peruzzi, M. Piccolo, M. Rotondo, A. Zallo, S. Passaggio, C. Patrignani, Brian Shuve, H. M. Lacker, B. Bhuyan, U. Mallik, C. Chen, J. Cochran, S. Prell, A. V. Gritsan, N. Arnaud, M. Davier, F. Le Diberder, A. M. Lutz, G. Wormser, Dieter Lange, D. Wright, J. P. Coleman, E. Gabathuler, D. Hutchcroft, D. Payne, C. Touramanis, A. J. Bevan, F. Di Lodovico, R. Sacco, G. Cowan, Sw. Banerjee, D. N. Brown, C. L. Davis
Abstract
A study of the two-body decays ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{X}_{c\overline{c}}{K}^{\ifmmode\pm\else\textpm\fi{}}$, where ${X}_{c\overline{c}}$ refers to one charmonium state, is reported by the BABAR Collaboration using a data sample of $424\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The absolute determination of branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found for the decay ${B}^{+}\ensuremath{\rightarrow}X(3872){K}^{+}$ at the $3\ensuremath{\sigma}$ level. The absolute branching fraction $\mathcal{B}[{B}^{+}\ensuremath{\rightarrow}X(3872){K}^{+}]=[2.1\ifmmode\pm\else\textpm\fi{}0.6(\text{stat})\ifmmode\pm\else\textpm\fi{}0.3(\text{syst})]\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ is measured for the first time. It follows that $\mathcal{B}[X(3872)\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}]=(4.1\ifmmode\pm\else\textpm\fi{}1.3)%$, supporting the hypothesis of a molecular component for this resonance.