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Measurement of the branching fraction and $$C\!P$$ C P asymmetry in $${{{B} ^+}} \!\rightarrow {{J /\psi }} {{\rho } ^+} $$ B + → J / ψ ρ + decays

Author(s)
Aaij, R.; Beteta, C. A; Adeva, B.; Adinolfi, M.; Aidala, C. A; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Albero, A. A; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A. A; Amato, S.; Amerio, S.; Amhis, Y.; An, L.; Anderlini, L.; ... Show more Show less
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Abstract
Abstract The branching fraction and direct $$C\!P$$ C P asymmetry of the decay $${{{B} ^+}} \!\rightarrow {{J /\psi }} {{\rho } ^+} $$ B + → J / ψ ρ + are measured using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3 $$\,\text{ fb }^{-1}$$ fb - 1 . The following results are obtained: $$\begin{aligned} \mathcal {B}({{B} ^+} \!\rightarrow {{J /\psi }} {{\rho } ^+} )&= (3.81^{+0.25}_{-0.24} \pm 0.35) \times 10^{-5},\\ \mathcal {A}^{{C\!P}} ({{B} ^+} \!\rightarrow {{J /\psi }} {{\rho } ^+} )&= -0.045^{+0.056}_{-0.057} \pm 0.008, \end{aligned}$$ B ( B + → J / ψ ρ + ) = ( 3 . 81 - 0.24 + 0.25 ± 0.35 ) × 10 - 5 , A C P ( B + → J / ψ ρ + ) = - 0 . 045 - 0.057 + 0.056 ± 0.008 , where the first uncertainties are statistical and the second systematic. Both measurements are the most precise to date.
Date issued
2019-06-24
URI
https://hdl.handle.net/1721.1/131629
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2019 Jun 24;79(6):537
Version: Final published version

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