Evidence for a broad scalar Kπ resonance near 1.1 GeV

Tripple, T.G.; Chien, C. Y.; Malamud, E.; Mellema, J.E.; Schlein, P.; Slater, W.; Stork, D. H.; Ticho, Harold K.

doi:10.1016/0370-2693(68)90016-6

Cited by 99 publications

(2 citation statements)

References 16 publications

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“…This predicted state was much wider than 30 MeV, even reaching a 450 MeV width 3 . As soon as 1967 there were also experimental claims of a broad scalar πK resonance near 1.1 GeV [41], although the authors explicitly state that "The assumption of a pure Breit-Wigner form for the S-wave is probably a serious oversimplification". As it happened with the σ, the κ was also removed from the RPP in 1976.…”

Section: Introductionmentioning

confidence: 99%

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Precision dispersive approaches versus unitarized chiral perturbation theory for the lightest scalar resonances $$\sigma /f_0(500) $$ and $$\kappa /K_0^*(700) $$

Peláez

Rodas

Elvira

2021

Eur. Phys. J. Spec. Top.

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For several decades, the σ/f0(500) and κ/K * 0 (700) resonances have been subject to long-standing debate. Both their existence and properties were controversial until very recently. In this tutorial review we compare model-independent dispersive and analytic techniques versus unitarized Chiral Perturbation Theory, when applied to the lightest scalar mesons σ/f0(500) and κ/K * 0 (700). Generically, the former have settled the long-standing controversy about the existence of these states, providing a precise determination of their parameters, whereas unitarization of chiral effective theories allows us to understand their nature, spectroscopic classification and dependence on QCD parameters. Here we review in a pedagogical way their uses, advantages and caveats.

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Section: Introductionmentioning

confidence: 99%

“…Literally, the authors of that compilation wrote: "We are beginning to think that κ should be classified along with flying saucers, the Loch Ness Monster, and the Abominable Snowman".3 See reference 15 in[41].…”

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confidence: 99%