Study of B+c decays to the K+K−π+ final state and evidence for the decay B+c→χc0π+

Abstract : A study of B+c→K+K−π+ decays is performed for the first time using data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. Evidence for the decay B+c→χc0(→K+K−)π+ is reported with a significance of 4.0 standard deviations, resulting in the measurement of σ(B+c)σ(B+)×B(B+c→χc0π+) to be (9.8+3.4−3.0(stat)±0.8(syst))×10−6. Here B denotes a branching fraction while σ(B+c) and σ(B+) are the production cross-sections for B+c and B+ mesons. An indication of b¯c weak annihilation is found for the region m(K−π+)<1.834GeV/c2, with a significance of 2.4 standard deviations.
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Submitted on : Friday, July 22, 2016 - 9:01:38 AM
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R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Study of B+c decays to the K+K−π+ final state and evidence for the decay B+c→χc0π+. Physical Review D, American Physical Society, 2016, 94, pp.091102. ⟨10.1103/PhysRevD.94.091102⟩. ⟨in2p3-01347952⟩

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