Mesons with quantum numbers cannot be represented as simple quark-antiquark pairs. We explore hybrid configurations in the light meson sector comprising a quark, an antiquark and an excited gluon, studying the properties of such states in a phenomenological model inspired by the gauge/gravity correspondence. The computed mass, compared to the experimental mass of the candidates , and , favours as the lightest hybrid state. An interesting result concerns the stability of hybrid mesons at finite temperature: they disappear from the spectral function (i.e. they melt) at a lower temperature with respect to other states, light vector and scalar mesons and scalar glueballs.

Exotic J^{PC}=1^{-+} mesons in a holographic model of QCD

L. Bellantuono;P. Colangelo;F. Giannuzzi
2014-01-01

Abstract

Mesons with quantum numbers cannot be represented as simple quark-antiquark pairs. We explore hybrid configurations in the light meson sector comprising a quark, an antiquark and an excited gluon, studying the properties of such states in a phenomenological model inspired by the gauge/gravity correspondence. The computed mass, compared to the experimental mass of the candidates , and , favours as the lightest hybrid state. An interesting result concerns the stability of hybrid mesons at finite temperature: they disappear from the spectral function (i.e. they melt) at a lower temperature with respect to other states, light vector and scalar mesons and scalar glueballs.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/417482
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