# Observation of B+→J/ψ3π+2π− and B+→ψ(2S)π+π+π− decays

Abstract : The decays B+→J/ψ3π+2π− and B+→ψ(2S)π+π+π− are observed for the first time using a data sample corresponding to an integrated luminosity of 3.0fb−1, collected by the LHCb experiment in proton-proton collisions at the centre-of-mass energies of 7 and 8 TeV. The branching fractions relative to that of B+→ψ(2S)K+ are measured to be B(B+→J/ψ3π+2π−)B(B+→ψ(2S)K+)=(1.88±0.17±0.09)×10−2,B(B+→ψ(2S)π+π+π−)B(B+→ψ(2S)K+)=(3.04±0.50±0.26)×10−2, where the first uncertainties are statistical and the second are systematic.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01377013
Contributor : Claudine Bombar <>
Submitted on : Thursday, October 6, 2016 - 10:35:58 AM
Last modification on : Monday, June 3, 2019 - 1:38:03 PM

### Citation

R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Observation of B+→J/ψ3π+2π− and B+→ψ(2S)π+π+π− decays. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.72. ⟨10.1140/epjc/s10052-017-4610-6⟩. ⟨in2p3-01377013⟩

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