2022/10/03 by A. Palano, Palano, Antimo
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2210.00782
openalex publication_date 2022/10/03 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28
We study the Υ(1S) radiative decays to γπ+ π- and γK+ K- using data recorded with the BaBar detector operating at the SLAC PEP-II asymmetric-energy e+e- collider at center-of-mass energies at the Υ(2S) and Υ(3S) resonances. The Υ(1S) resonance is reconstructed from the decay Υ(nS)→ π+ π- Υ(1S), n=2,3. We also study the processes γγ→ ηc → η′K+K-, η′π+π-, and ηπ+ π- using a data sample of 519 fb-1 recorded with the BaBar detector at center-of-mass energies at and near the Υ(nS) (n = 2,3,4) resonances. A Dalitz plot analysis is performed of ηc decays to η′K+K-, η′π+π-, and ηπ+ π-. A new a0(1700) resonance is observed in the ηπ± invariant-mass spectrum from the ηc → ηπ+ π- decay. We compare ηc decays to η and η′ final states in association with scalar mesons as they relate to the identification of the scalar glueball.