Cross sections for the reactions e^+ e^− → K^0_S K^0_L π^0, K^0_S K^0_L η, and K^0_S K^0_L π^0 π^0 from events with initial-state radiation
We study the processes e^+ e^− → K^0_S K^0_L π^0 γ, K^0_S K^0_L ηγ, and K^0_S K^0_L π^0 π^0 γ, 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^− → K^0_S K^0_L π^0, K^0_S K^0_L η, and K^0_S K^0_L π^0 π^0 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.
Additional Information© 2017 American Physical Society. Received 2 February 2017; published 6 March 2017. We are grateful for the extraordinary contributions of our PEP-II2 colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the U.S. Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), the Commissariat à l'Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (Netherlands), the Research Council of Norway, the Ministry of Education and Science of the Russian Federation, Ministerio de Economía y Competitividad (Spain), the Science and Technology Facilities Council (United Kingdom), and the Binational Science Foundation (U.S.–Israel). Individuals have received support from the Marie-Curie IEF program (European Union) and the A. P. Sloan Foundation (USA).
Published - PhysRevD.95.052001.pdf