Journal Article

FZJ-2012-00587

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The proton-antiproton mass threshold structure in ψ(3686) radiative decay revisited

Haidenbauer, J. (Corresponding author)FZJ* ; Meißner, U.-G.FZJ*

2012
Soc. [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10234  doi:10.1103/PhysRevD.86.077503

Abstract: The near-threshold behavior of the ppbar invariant mass spectrum from the psi(3686) -> gamma ppbar decay reported recently by the BESIII Collaboration is analyzed. The enhancement in the ppbar invariant mass spectrum near threshold is nicely reproduced by the ppbar final-state interaction based on the isospin averaged 1S0 partial-wave amplitude as predicted by the Julich nucleon--antinucleon model. Contributions from the f_2(1910) or f_2(1950) mesons, as promoted in earlier works, are not needed.

Keyword(s): J/psi(3100): radiative decay ; psi(3685): radiative decay ; anti-p p: mass spectrum ; anti-p p: final-state interaction ; mass enhancement: threshold ; scattering amplitude: partial wave ; interpretation of experiments: BES ; psi mesons --> p anti-p

Note: *Temporary entry*; 3 pages, 3 figures, chi^2 for the results added, to be published in Phys. Rev. D

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Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)
2. Theorie der starken Wechselwirkung (IKP-3)

Research Program(s):

1. 531 - Hadron Structure and Dynamics (HSD) (POF2-531) (POF2-531)

Appears in the scientific report 2012

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Database coverage:
; ; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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