Journal article
Study of the reaction 𝑒+𝑒−→𝜓(2𝑆)𝜋+𝜋− via initial-state radiation at BaBar
Physical review. D, Particles, fields, gravitation, and cosmology, Vol.89(11), 111103(R)
06/25/2014
DOI: 10.1103/PhysRevD.89.111103
Abstract
We study the process e + e − → ψ ( 2 S ) 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 ( 2 S ) π + π − mass distribution from 3.95 to 5.95     GeV / c 2 , and measure the center-of-mass energy dependence of the associated e + e − → ψ ( 2 S ) π + π − cross section. The mass distribution exhibits evidence of two resonant structures. A fit to the ψ ( 2 S ) π + π − mass distribution corresponding to the decay mode ψ ( 2 S ) → J / ψ π + π − yields a mass value of 4340 ± 16   ( stat )   ± 9   ( syst )     MeV / c 2   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 / c 2   and a width of 104 ± 48   ( stat )   ± 10   ( syst )     MeV . In addition, we show the π + π − mass distributions for these resonant regions.
Details
- Title: Subtitle
- Study of the reaction 𝑒+𝑒−→𝜓(2𝑆)𝜋+𝜋− via initial-state radiation at BaBar
- Creators
- Jordi Garra TicóEugeni Graugés PousBaBar CollaborationU Mallik (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Particles, fields, gravitation, and cosmology, Vol.89(11), 111103(R)
- DOI
- 10.1103/PhysRevD.89.111103
- ISSN
- 1550-7998
- eISSN
- 1550-2368
- Publisher
- American Physical Society
- Number of pages
- 8
- Language
- English
- Date published
- 06/25/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200049902771
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