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D. Parganlija, F. Giacosa:
"The f0(1790) and a0(1950) Resonances as Excited \bar{q}q States in the Extended Linear Sigma Model";
in: "Proceedings of Excited QCD 2017", Acta Physica Polonica B, 2017, S. 1029 - 1036.

A decade ago, BES Collaboration reported the discovery of a new scalar isosinglet resonance denoted as f0(1790). The finding was subsequently confirmed by LHCb. Recently, the existence of the corresponding isotriplet state -- the a0(1950) resonance -- has been claimed by BABAR. We investigate whether these resonances can be described as excited \bar{q}q states. To this end, a comprehensive Lagrangian containing ground-state \bar{q}q mesons as well as their first excitations is constructed in accordance with symmetries of the strong interaction. Both f0(1790) and a0(1950) emerge as compatible with \bar{q}q excitations; however, tension appears to arise between the simultaneous interpretation of f0(1790)/a0(1950) and pseudoscalar mesons η(1295), π(1300), η(1440) and K(1460) as excited \bar{q}q states.

sigma model: linear | quark antiquark | excited state | pseudoscalar meson | eta(1440) | eta(1295) | pi(1300) | K(1460) | f0(1790) | LHC-B | BES | BaBar

http://dx.doi.org/10.5506/APhysPolBSupp.10.1029

http://inspirehep.net/record/1622283