Study of the decay Ds+→KS0KS0π+ and observation of an isovector partner to f0(1710)

Abstract

Using e+e− annihilation data corresponding to a total integrated luminosity of 6.32 fb−1 collected at center-of-mass energies between 4.178 and 4.226 GeV with the BESIII detector, we perform an amplitude analysis of the decay Ds+→KS0KS0π+ for the first time. An enhancement is observed in the KS0KS0 mass spectrum near 1.7 GeV/c2, which was not seen in Ds+→K+K−π+ in an earlier work, implying the existence of an isospin one partner of the f0(1710). The branching fraction of the decay Ds+→KS0KS0π+ is determined to be B(Ds+→KS0KS0π+)=(0.68±0.04stat±0.01syst)%.Received 19 October 2021Revised 31 December 2021Accepted 23 February 2022DOI:https://doi.org/10.1103/PhysRevD.105.L051103Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBranching fractionHadronic decaysPhysical SystemsCharmed mesonsLight mesonsMesonsQuark modelPropertiesParticle propertiesTechniquesLepton collidersParticles & Fields