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Study of the reaction e+e- →ψ (2S)π+π- via initial-state radiation at B a B ar

Lees, J. P.
•
Poireau, V.
•
Tisserand, V.
altro
Wu, S. L.
2014
  • journal article

Periodico
PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
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 (nS) (n=2,3,4) resonances and correspond to an integrated luminosity of 520fb-1. We investigate the ψ(2S)π+π- mass distribution from 3.95 to 5.95GeV/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.
DOI
10.1103/PhysRevD.89.111103
WOS
WOS:000338663100001
Archivio
http://hdl.handle.net/11368/2836211
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84903723273
http://link.aps.org/doi/10.1103/PhysRevD.89.111103
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Soggetti
  • Nuclear and High Ener...

Web of Science© citazioni
74
Data di acquisizione
Mar 15, 2024
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Data di acquisizione
Apr 19, 2024
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