Light meson spectroscopy from Dalitz plot analyses of ηc decays to η′K+K−, η′π+π−, and ηπ+π− produced in two-photon interactions

<i>B<span class="sc">a</span>B<span class="sc">ar</span></i> Collaboration

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Abstract

We study the processes η′K+K−, η′π+π−, and ηπ+π−, and using a data sample of recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy collider at center-of-mass energies at and near the (, 3, 4) resonances. This is the first observation of the decay and we measure the branching fraction . Significant interference is observed between and the nonresonant two-photon process . A Dalitz plot analysis is performed of decays to , , and . Combined with our previous analysis of , we measure the parameters and the ratio between its and couplings. The decay is dominated by the resonance, also observed in radiative decays. A new resonance is observed in the channel. We also compare decays to and final states in association with scalar mesons as they relate to the identification of the scalar glueball.

Original languageEnglish
Article number072002
JournalPhysical Review D
Volume104
Issue number7
DOIs
Publication statusPublished - 1 Oct 2021

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY

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