Observation of the chi _{c2}(2P) meson in the reaction gamma gamma -->DD[over -bar] at BABAR
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Aubert-2010-Observation of the c.pdf
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Author(s)
Dujmic, Denis
Henderson, Shawn Wesley
Sciolla, Gabriella
Yamamoto, R. K.
Zhao, M.
Cowan, Ray F
Fisher, Peter H
Spitznagel, Michael A
Alternative Title
Observation of the χc2(2P) meson in the reaction γγ→DD̅ at BABAR
Date Issued
May 2010
Journal
Physical Review D
Publisher
American Physical Society
Citation
BABAR Collaboration et al. “Observation of the chi _{c2}(2P) meson in the reaction gamma gamma -->DD[over -bar] at BABAR.” Physical Review D 81.9 (2010): 092003. © 2010 The American Physical Society
Version
Final published version
Abstract
A search for the Z(3930) resonance in γγ production of the DD̅ system has been performed using a data sample corresponding to an integrated luminosity of 384 fb[superscript -1] recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD̅ invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2.7±1.1) MeV/c[superscript 2] and (21.3±6.8±3.6) MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (J[superscript PC]=2[superscript ++]); therefore we identify the Z(3930) state as the χ[subscript c2](2P) meson. The value of the partial width Γ[subscript γγ]×B(Z(3930)→DD̅ ) is found to be (0.24±0.05±0.04) keV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.092003
