Here, we study the processes e+e- → γ ISR J/ψ , where J/ψ → π +π-π0, J/ψ → K +K-π0 , and J / ψ → K$0\atop{S}$ K ± π ∓ using a data sample of 519 fb-1 recorded with the BABAR detector operating at the ...SLAC PEP-II asymmetric-energy e+e- collider at center-of-mass energies at and near the Υ (nS) (n = 2 , 3 , 4) resonances. We measure the ratio of branching fractions R1 = $B(J/ψ →K^+K^- π^0)\atop{B(J/ψ →π^+π^- π^0)}$ and R2= $B(J/ψ →K^0_SK^±π^∓)\atop{B(J/ψ →π^+π^- π^0)}$. We perform Dalitz plot analyses of the three J/ψ decay modes and measure fractions for resonances contributing to the decays. We also analyze the J/ψ → $π^+π^- π^0$ decay using the Veneziano model. We observe structures compatible with the presence of ρ (1450) in all three J/ψ decay modes and measure the relative branching fraction: R (p(1450)) = $Bp(1450)→K^+K^-)\atop{B(p(1450)→π^+π^-)}$ +0.307 ± 0.084 (stat) ± 0.082 (sys).
We study the processes e + e - → γ ISR J / ψ , where J / ψ → π + π - π 0 , J / ψ → K + K - π 0 , and J / ψ → K$0\atop{S}$ K ± π ∓ using a data sample of 519 fb - 1 recorded with the BABAR detector ...operating at the SLAC PEP-II asymmetric-energy e + e - collider at center-of-mass energies at and near the Υ ( n S ) ( n = 2 , 3 , 4 ) resonances.
We study the processes e+e−→γISRJ/ψ, where J/ψ→π+π−π0, J/ψ→K+K−π0, and J/ψ→KS0K±π∓ using a data sample of 519 fb−1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e− ...collider at center-of-mass energies at and near the Υ(nS) (n=2,3,4) resonances. We measure the ratio of branching fractions R1=B(J/ψ→K+K−π0)B(J/ψ→π+π−π0) and R2=B(J/ψ→KS0K±π∓)B(J/ψ→π+π−π0). We perform Dalitz plot analyses of the three J/ψ decay modes and measure fractions for resonances contributing to the decays. We also analyze the J/ψ→π+π−π0 decay using the Veneziano model. We observe structures compatible with the presence of ρ(1450) in all three J/ψ decay modes and measure the relative branching fraction: R(ρ(1450))=B(ρ(1450)→K+K−)B(ρ(1450)→π+π−)=0.307±0.084(stat)±0.082(sys).
We study the processes e+e−→KS0KL0π0γ, KS0KL0ηγ, and KS0KL0π0π0γ, where the photon is radiated from the initial state, providing cross section measurements for the hadronic final states over a ...continuum of center-of-mass energies. The results are based on 469 fb−1 of data collected at or near the Υ(4S) resonance with the BABAR detector at SLAC. We present the first measurements of the e+e−→KS0KL0π0, KS0KL0η, and KS0KL0π0π0 cross sections up to a center-of-mass energy of 4 GeV and study their intermediate resonance structures. We observe J/ψ decays to all of these final states for the first time, present measurements of their J/ψ branching fractions, and search for ψ(2S) decays.
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