@Article{BABARCollaborationLees_etal2021,
author="BABAR Collaboration (Lees, J. P. et al
and Martinez-Vidal, F.
and Oyanguren, A.",
title="Light meson spectroscopy from Dalitz plot analyses of eta(c) decays to eta {\textquoteright} K+K-, eta {\textquoteright}pi(+)pi(-), and eta pi(+)pi(-) produced in two-photon interactions",
journal="Physical Review D",
year="2021",
publisher="Amer Physical Soc",
volume="104",
number="7",
pages="072002--23pp",
abstract="We study the processes gamma gamma -> eta(c )-> eta{\textquoteright}K+K-, eta{\textquoteright}pi(+)pi(-), and eta pi(+)pi(-) using a data sample of 519 fb(-1) recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e(+)e(-) collider at center-of-mass energies at and near the Upsilon(nS) (n = 2, 3, 4) resonances. This is the first observation of the decay eta(c)-> eta{\textquoteright}K+K- and we measure the branching fraction Gamma (eta(c) -> eta{\textquoteright} K+K- )/(Gamma(eta(c) -> eta{\textquoteright}pi(+)pi(-)) = 0.644 +/- 0.039(stat) +/- 0.032(sys). Significant interference is observed between gamma gamma ->eta(c)->eta pi(+)pi(-) and the nonresonant two-photon process gamma gamma -> eta pi(+)pi(-). A Dalitz plot analysis is performed of eta(c) decays to eta{\textquoteright}K+K-, eta{\textquoteright}pi(+)pi(-) and eta pi(+)pi(-). Combined with our previous analysis of eta(c) -> K (K) over bar pi, we measure the K-0*(1430) parameters and the ratio between its eta{\textquoteright}K and pi K couplings. The decay eta(c) -> eta{\textquoteright}pi(+)pi(-) is dominated by the f(0)(2100) resonance, also observed in J/psi radiative decays. A new a(0) (1700) -> eta pi resonance is observed in the eta(c) -> eta pi(+)pi(-) channel. We also compare eta(c) decays to eta and eta{\textquoteright} final states in association with scalar mesons as they relate to the identification of the scalar glueball.",
optnote="WOS:000704612400001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4994), last updated on Sun, 24 Oct 2021 17:29:25 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.104.072002",
opturl="https://arxiv.org/abs/2106.05157",
opturl="https://doi.org/10.1103/PhysRevD.104.072002",
language="English"
}