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. Branching fraction measurements and spin-parity analyses of Υ(1S) radiative decays are reported for the I=0 S-wave and f2(1270) resonances in the π+π− mass spectrum, the f′2(1525) and f0(1500) in the K+K− mass spectrum, and the f0(1710) in both.

Study of (1S) radiative decays to γπ+π- and γk+K-

Lanceri, L.;Vitale, L.;
2018

Abstract

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. Branching fraction measurements and spin-parity analyses of Υ(1S) radiative decays are reported for the I=0 S-wave and f2(1270) resonances in the π+π− mass spectrum, the f′2(1525) and f0(1500) in the K+K− mass spectrum, and the f0(1710) in both.
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https://journals.aps.org/prd/abstract/10.1103/PhysRevD.97.112006
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2941860
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