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DC Field | Value | Language |
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dc.contributor.author | Garra Ticó, Jordi | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-03-25T11:51:30Z | - |
dc.date.available | 2019-03-25T11:51:30Z | - |
dc.date.issued | 2014-06-25 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/130860 | - |
dc.description.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. | - |
dc.format.extent | 8 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.89.111103 | - |
dc.relation.ispartof | Physical Review D, 2014, vol. 89, num. 11, p. 111103 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.89.111103 | - |
dc.rights | (c) American Physical Society, 2014 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Massa (Física) | - |
dc.subject.classification | Radiació | - |
dc.subject.classification | Energia | - |
dc.subject.classification | Física de partícules | - |
dc.subject.other | Mass (Physics) | - |
dc.subject.other | Radiation | - |
dc.subject.other | Energy | - |
dc.subject.other | Particle physics | - |
dc.title | Study of the reaction e+e- → ψ (2S)π+π- via initial-state radiation at B a B ar | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 654991 | - |
dc.date.updated | 2019-03-25T11:51:30Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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654991.pdf | 726.51 kB | Adobe PDF | View/Open |
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