Strangeness-changing scalar form factors

By M. Jamin, J. A. Oller, A. Pich. 2001

144 citations recorded by the source corpus.

Abstract We derive expressions for strangeness-changing scalar form factors, which incorporate known theoretical constraints both at low and high energies. Their leading behaviour in the limit of a large number of colours is calculated from the resonance chiral Lagrangian, and a set of short-distance constraints on the scalar resonance couplings is obtained, imposing the form factors to vanish at infinite momentum transfer. The important effects of meson rescattering are taken into account by exploiting unitarity and analyticity. Making use of previous results on S-wave Kπ scattering [1] , and a coupled-channel dispersion-relation analysis, the Kπ , Kη and Kη ′ scalar form factors are calculated up to 2 GeV. These scalar form factors are a key ingredient in the determination of the corresponding scalar spectral function which is important in the extraction of the mass of the strange quark from QCD sum rules as well as hadronic τ decays.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0f8f5f7e967de2f29e10e6f26740cee44ef29856

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In Nuclear and High Energy Physics

1. A. Pich
2. V. Cirigliano
3. G. Ecker
4. U. Vienna
5. M. Jung
6. Igor P. Ivanov
7. J. Camalich

Citations in the corpus

• Kaon Decays in the Standard Model (2011, background): “A discussion of higherorder effects on this quantity can be found in Bijnens and 4 See for instance Jamin et al. (2002), Jamin et al. (2004), Jamin et al. (2006), Bernard et al. (2006), Bernard and Passemar (2008), Bernard et al. (2009), Bernard et al. (2011), Abbas et al. (2010).”