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Hanhart, Christoph and Kubis, Bastian and Peláez Sagredo, José Ramón (2007) Investigation of a_(0)-f_(0) mixing. Physical review D, 76 (7). ISSN 1550-7998
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Official URL: http://dx.doi.org/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 qq̅ states. Amongst the possible experimental signals, we discuss observable consequences for the reaction J/ ψ→Øπ^0 ɳ in detail. In particular, we demonstrate that he effect of a_(0) –f_(0) mixing is by far the most important isospinbreaking effect in the resonance region and can indeed be extracted from experiment.
Item Type: | Article |
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Additional Information: | ©2007 The American Physical Society. |
Uncontrolled Keywords: | Chiral perturbation-theory; Pion-kaon scattering; Scalar mesons; Isospin violation; Elastic-scattering; Multiquark hadrons; Radiative decays; Virtual photons; Nucleon-nucleon; Threshold |
Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |
ID Code: | 35314 |
Deposited On: | 27 Jan 2016 19:40 |
Last Modified: | 10 Dec 2018 15:09 |
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