Study of the Reaction e[superscript +]e[superscript −] → ψ(2S)π[superscript +]π[superscript − via Initial-State Radiation at BaBar
Name
Lees-2012-Study of the reaction.pdf
Size
278.16 KB
Format
Adobe PDF
Checksum (MD5)
864c8c73758914a4e89cdbcf674dcb90
Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
June 2014
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, A. Palano, G. Eigen, et al. “Study of the Reaction e[superscript +]e[superscript −] → ψ(2S)π[superscript +]π[superscript − via Initial-State Radiation at BaBar.” Phys. Rev. D 89, no. 11 (June 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We study the process e[superscript +]e[superscript −] → ψ(2S)π[superscript +]π[superscript −] 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[superscript −1]. We investigate the ψ(2S)π[superscript +]π[superscript −] mass distribution from 3.95 to 5.95 GeV/c[superscript 2], and measure the center-of-mass energy dependence of the associated e[superscript +]e[superscript −] → ψ(2S)π[superscript +]π[superscript −] cross section. The mass distribution exhibits evidence of two resonant structures. A fit to the ψ(2S)π[superscript +]π[superscript −] mass distribution corresponding to the decay mode ψ(2S) → J/ψπ[superscript +]π[superscript −] yields a mass value of 4340 ± 16 (stat) ± 9 (syst) MeV/c[superscript 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[superscript 2] and a width of 104 ± 48 (stat) ± 10 (syst) MeV. In addition, we show the π[superscript +]π[superscript −] mass distributions for these resonant regions.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.89.111103
