Cross sections for the reactions $e^+ e^-\to K^0_S K^0_L\pi^0$, $K^0_S K^0_L\eta$, and $K^0_S K^0_L\pi^0\pi^0$ from events with initial-state radiation

Abstract : We study the processes $e^+ e^-\to K^0_S K^0_L\pi^0\gamma$, $K^0_S K^0_L\eta\gamma$, and $K^0_S K^0_L\pi^0\pi^0\gamma$, 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 $\Upsilon(4S)$~ resonance with the BaBar detector at SLAC. We present the first measurements of the $e^+ e^-\to K^0_S K^0_L\pi^0$, $K^0_S K^0_L\eta$, and $K^0_S K^0_L\pi^0\pi^0$ cross sections up to a center-of-mass energy of 4~GeV, and study their intermediate resonance structures. We observe $J/\psi$ decays to all of these final states for the first time, present measurements of their $J/\psi$ branching fractions, and search for $\psi(2S)$ decays.
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Article dans une revue
Physical Review D, American Physical Society, 2017, 95, pp.052001 〈10.1103/PhysRevD.95.052001〉
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http://hal.in2p3.fr/in2p3-01450164
Contributeur : Claudine Bombar <>
Soumis le : mardi 31 janvier 2017 - 09:32:15
Dernière modification le : jeudi 11 janvier 2018 - 06:13:33

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J.-P. Lees, V. Poireau, V. Tisserand. Cross sections for the reactions $e^+ e^-\to K^0_S K^0_L\pi^0$, $K^0_S K^0_L\eta$, and $K^0_S K^0_L\pi^0\pi^0$ from events with initial-state radiation. Physical Review D, American Physical Society, 2017, 95, pp.052001 〈10.1103/PhysRevD.95.052001〉. 〈in2p3-01450164〉

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