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G. Alkhazov; M. Andreotti; J. Arnau Romeu; S. Barsuk; V. Batozskaya; B. Batsukh; F. Betti; M. van Beuzekom; A. Bizzeti; S. Blusk; V. Bocci; D. Brundu; C. Burr; L. Capriotti; A. Carbone; L. Cassina; G. Cavallero; D. Chamont; C. Chen; V. Chobanova; M. Chrzaszcz; M. Clemencic; H.-P. Dembinski; A. Dosil Suárez; G. Dujany; J. M. Durham; V. Egorychev; S. Eisenhardt; S. Farry; L. Ferreira Lopes; R. A. Fini; C. Fitzpatrick; A. Golutvin; P. Griffith; O. Grünberg; T. Hadavizadeh; L. Henry; A. Hicheur; W. Huang; M. Hushchyn; K. Ivshin; J. Jalocha; N. Jurik; J. M. Kariuki; M. Kecke; M. Kenzie; B. Khanji; R. Kopecna; F. Kress; M. Kucharczyk; T. Kvaratskheliya; P.-R. Li; E. Luppi; O. Lupton; A. Lusiani; D. Maisuzenko; S. Malde; M. Marinangeli; G. Martellotti; A. Mauri; J. V. Mead; D. A. Milanes; D. S. Mitzel; C. H. Murphy; K. Müller; P. Naik; S. Neubert; S. Nieswand; M. Pappagallo; C. Patrignani; M. Petruzzo; F. Pisani; S. Playfer; F. Polci; N. Polukhina; B. Rachwal; C. Remon Alepuz; M. Rotondo; M. S. Rudolph; C. Sanchez Gras; G. Sarpis; M. Schmelling; H. F. Schreiner; A. Seuthe; E. Shmanin; I. Skiba; M. W. Slater; J. G. Smeaton; E. Spadaro Norella; P. Spradlin; E. Thomas; M. J. Tilley; J. Walsh; Y. Wang; N. K. Watson; D. Websdale; G. Wilkinson; Z. Xu; D. Zhang; Y. Zhang
The European physical journal. C, Particles and fields, 06/2019, Letnik: 79, Številka: 6Journal Article
Abstract The branching fraction and direct $$C\!P$$ CP asymmetry of the decay $${{{B} ^+}} \!\rightarrow {{J /\psi }} {{\rho } ^+} $$ B+→J/ψρ+ 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/ψρ+)=(3.81-0.24+0.25±0.35)×10-5,ACP(B+→J/ψρ+)=-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.
