Journal Article

PreJuSER-60488

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Investigation of a0-f0 mixing

Hanhart, C.FZJ* ; Kubis, B.FZJ* ; Pelaez, J. R.

2007
Soc. [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10507  doi:10.1103/PhysRevD.76.074028

Abstract: We investigate the isospin-violating mixing of the light scalar mesons a(0)(980) and f(0)(980) within the unitarized chiral approach. Isospin-violating effects are considered to leading order in the quark mass differences and electromagnetism. In this approach both mesons are generated through meson-meson dynamics. Our results provide a description of the mixing phenomenon within a framework consistent with chiral symmetry and unitarity, where these resonances are not predominantly q (q) over bar states. Amongst the possible experimental signals, we discuss observable consequences for the reaction J/Psi ->phi pi(0)eta in detail. In particular, we demonstrate that the effect of a(0)-f(0) mixing is by far the most important isospin-breaking effect in the resonance region and can indeed be extracted from experiment.

Keyword(s): a0(980) f0(980): mixing ; isospin: violation ; symmetry: chiral ; quark: mass difference ; unitarity ; J/psi(3100): hadronic decay ; J/psi(3100): width ; form factor: decay ; numerical calculations ; J/psi(3100) --> Phi(1020) eta pi0

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theoretische Kernphysik (IKP-3)

Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2007

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