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  • Observation of the semileptonic decay $B^{+}\to p\overline{p}\mu^{+}\nu_{\mu}
    Aslanides, E; Barsuk, S; Bediaga, I; Bezshyiko, Ia; Bieker, M. S; Bifani, S; Bocci, V; Borisyak, M; Bowcock, T. J. V; Buonaura, A; Chen, C; Clarke, P. E. L; Cliff, H. V; Corti, G; Crocombe, A; Dalseno, J; D'Ambrosio, C; De Miranda, J. M; Deschamps, O; Dufour, L; Eidelman, S; Farry, S; Fazzini, D; Prieto, A. Fernandez; Sevilla, M. Franco; Frei, C; Gambetta, S; Gotti, C; Diaz, R. Graciani; Graverini, E; Gruber, L; Hennessy, K; Henry, L; Hunter, R. J; Kandybei, S; Kazeev, N; Khanji, B; Kharisova, A; Klimaszewski, K; Kotriakhova, S; Lacarrere, D; Liang, X; Lucchesi, D; Machefert, F; Mohan, L. R. Madhan; Maev, O; Maisuzenko, D; Majewski, M. W; Maltsev, T; Marangotto, D; Maratas, J; Martinelli, M; Vidal, F. Martinez; Meaux, C; Mödden, A; Muheim, F; Muzzetto, P; Newcombe, R; Nguyen-Mau, C; Obraztsov, V; Osborn, J. D; Pappenheimer, C; Pastore, A; Pearce, A; Altarelli, M. Pepe; Pinci, D; Polycarpo, E; Popov, D; Pullen, H; Qian, W; Ratnikov, F; Alepuz, C. Remon; Renaudin, V; Ricciardi, S; Saitta, B; Rios, C. Santamarina; Santimaria, M; Schellenberg, M; Schindler, H; Schmelzer, T; Schopper, A; de Oliveira, L. Silva; Soares, M; Lavra, L. Soares; Stefkova, S; Stracka, S; Stramaglia, M. E; Svihra, P; Szumlak, T; Tekampe, T; Tilley, M. J; Tournefier, E; Tran, M. T; Uwer, U; Vesterinen, M; Volkov, V; Williams, M. R. J; Xu, M; Yao, Y; Zhang, Y

    11/2019
    Journal Article

    JHEP 03 (2020) 146 The Cabibbo-suppressed semileptonic decay $B^{+}\to p\overline{p}\mu^{+}\nu_{\mu}$ is observed for the first time using a sample of $pp$ collisions corresponding to an integrated luminosity of 1.0, 2.0 and 1.7fb$^{-1}$ at centre-of-mass energies of 7, 8 and 13TeV, respectively. The differential branching fraction is measured as a function of the $p\overline{p}$ invariant mass using the decay mode $B^{+}\to J/\psi K^{+}$ for normalisation. The total branching fraction is measured to be \begin{align*} \mathcal{B}(B^{+}\to p\overline{p}\mu^{+}\nu_{\mu}) = (5.27 ^{+0.23}_{-0.24} \pm 0.21 \pm 0.15)\times 10^{-6}, \end{align*} where the first uncertainty is statistical, the second systematic and the third is from the uncertainty on the branching fraction of the normalisation channel.

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