Eur. Phys. J. C (2014) 74: 2830
https://doi.org/10.1140/epjc/s10052-014-2830-6

Regular Article - Theoretical Physics

Exotic mesons in a holographic model of QCD

¹ INFN-Sezione di Bari, via Orabona 4, 70126 , Bari, Italy
² Dipartimento di Fisica, Universitá degli Studi di Bari, via Orabona 4, 70126 , Bari, Italy

^* e-mail: floriana.giannuzzi@ba.infn.it

Received: 28 February 2014
Accepted: 18 March 2014
Published online: 9 April 2014

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.