Mesons with quantum numbers $J^{PC}=1^{-+}$ 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 $1^{-+}$ candidates $\pi_1(1400)$, $\pi_1(1600)$ and $\pi_1(2015)$,
favous $\pi_1(1400)$ 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.Comment: 11 pages, 7 figure

Bellantuono, Loredana

Colangelo, Pietro

Giannuzzi, Floriana

English

arXiv

L. Bellantuono

P. Colangelo

F. Giannuzzi

Springer - Publisher Connector

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

Mesons with quantum numbers $$J^{PC}\!=\!1^{-+}$$ 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 $$1^{-+}$$ candidates $$\pi _1(1400)$$, $$\pi _1(1600)$$ and $$\pi _1(2015)$$, favours $$\pi _1(1400)$$ 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

EDP Sciences OAI-PMH repository (1.2.0)

Exotic

Crossref

The European Physical Journal C

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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