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

: 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 → χ c 0 ( → 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 → χ c 0 π + ) 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 ¯ bc weak annihilation is found for the region m ( K − π + )1 . 834 GeV /c 2 , with a significance of 2.4 standard deviations. A study of B þ c → K þ K − π þ 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 center-of-mass energies of 7 and 8 TeV. Evidence for the decay B þ c → χ c 0 ð → K þ K − Þ π þ is reported with a significance of 4.0 standard deviations, giving σ ð B þ c Þ σ ð B þ Þ × B ð B þ c → χ c 0 π þ Þ ¼ ð 9 . 8 þ 3 . 4 − 3 . 0 ð stat Þ (cid:2) 0 . 8 ð syst ÞÞ × 10 − 6 . Here B denotes a branching fraction while σ ð B þ c Þ and σ ð B þ Þ are the production cross sections for B þ c and B þ mesons. An indication of ¯ bc weak annihilation is found for the region m ð K − π þ Þ < 1 . 834 GeV =c 2 , with a significance of 2.4 standard deviations.