We study the process e+e−→ψ(2S)π+π− with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the BABAR detector at center-of-mass energies at and near the ϒ(nS) (n=2,3,4) resonances and correspond to an integrated luminosity of 520  fb−1. We investigate the ψ(2S)π+π− mass distribution from 3.95 to 5.95  GeV/c2, and measure the center-of-mass energy dependence of the associated e+e−→ψ(2S)π+π− cross section. The mass distribution exhibits evidence of two resonant structures. A fit to the ψ(2S)π+π− mass distribution corresponding to the decay mode ψ(2S)→J/ψπ+π− yields a mass value of 4340±16 (stat) ±9 (syst)  MeV/c2  and a width of 94±32 (stat) ±13 (syst)  MeV for the first resonance, and for the second a mass value of 4669±21 (stat) ±3 (syst)  MeV/c2  and a width of 104±48 (stat) ±10 (syst)  MeV. In addition, we show the π+π− mass distributions for these resonant regions.

Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Palano, A., et al. (2014). Study of the reaction e(+)e(-) -> psi(2S)pi(+)pi(-) via initial-state radiation at BABAR. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(11), 1-8 [10.1103/PhysRevD.89.111103].

Study of the reaction e(+)e(-) -> psi(2S)pi(+)pi(-) via initial-state radiation at BABAR

PATRIGNANI, CLAUDIA;
2014

Abstract

We study the process e+e−→ψ(2S)π+π− with initial-state-radiation events produced at the PEP-II asymmetric-energy collider. The data were recorded with the BABAR detector at center-of-mass energies at and near the ϒ(nS) (n=2,3,4) resonances and correspond to an integrated luminosity of 520  fb−1. We investigate the ψ(2S)π+π− mass distribution from 3.95 to 5.95  GeV/c2, and measure the center-of-mass energy dependence of the associated e+e−→ψ(2S)π+π− cross section. The mass distribution exhibits evidence of two resonant structures. A fit to the ψ(2S)π+π− mass distribution corresponding to the decay mode ψ(2S)→J/ψπ+π− yields a mass value of 4340±16 (stat) ±9 (syst)  MeV/c2  and a width of 94±32 (stat) ±13 (syst)  MeV for the first resonance, and for the second a mass value of 4669±21 (stat) ±3 (syst)  MeV/c2  and a width of 104±48 (stat) ±10 (syst)  MeV. In addition, we show the π+π− mass distributions for these resonant regions.
2014
Lees, J.P., Poireau, V., Tisserand, V., Tico, J.G., Grauges, E., Palano, A., et al. (2014). Study of the reaction e(+)e(-) -> psi(2S)pi(+)pi(-) via initial-state radiation at BABAR. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(11), 1-8 [10.1103/PhysRevD.89.111103].
Lees, J. P.; Poireau, V.; Tisserand, V.; Tico, J. Garra; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/533758
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