Glueball spectra and Regge trajectories from a modified holographic softwall model

Abstract

In this work we propose a modified holographic softwall model, analytically solvable, to calculate the masses of lightest scalar glueball and its radial excitations and of higher spin glueball states for both even and odd spins. From these results we obtain their respective Regge trajectories, associated with the pomeron for even spins and with the odderon for odd spins. These results are in agreement with those calculated using other approaches.

Dynamical corrections to the anomalous holographic soft-wall model: the pomeron and the odderon

“…So, we conclude that the dynamical corrections lead to effective potentials that work like a hard-wall at some finite value of the holographic coordinate z implying good results for the glueball masses and Regge trajectories. Similar results have also been recently found for the (non-anomalous) dynamical soft-wall model [35] and for a modified (analytical) soft-wall model [19].…”

“…It was shown in Ref. [19] that the soft-wall model does not give the expected masses for the scalar glueball states (and its radial excitations) and higher spin glueball states (with even and odd spins).…”

Pion condensation in a soft-wall AdS/QCD model

“…In bottom-up holographic framework, the soft-wall model [38] provides a good start point to describe both chiral symmetry breaking and linear confinement in the vacuum. In the extended soft-wall models [39][40][41][42][43][44][45][46][47][48][49][50][51], meson spectra consistent with experimental data have been obtained. At finite temperature, it has been shown in [52][53][54][55][56][57][58][59][60][61][62][63][64] that the qualitative properties of phase transition between chiral asymmetric phase and chiral symmetric phase agree very well with the 4D understanding from lattice simulations and model calculations.…”

“…Compared to hard-wall model, the soft-wall model [38] contains the information of linear confinement as well as chiral symmetry breaking. Its extended models [39][40][41][42][43][44][45][46][47][48][49][50][51] could predict meson spectra in good agreement with experimental data. It is also easy to be extended to finite temperature and give good description of chiral phase transition [52][53][54][55][56][57][58][59][60][61][62][63][64] (see also other bottom-up holographic models [65][66][67][68][69][70]).…”

Generalized parton distributions: confining potential effects within AdS/QCD

“…Consequently several authors are investigating how to improve the SW description to incorporate the largest number of QCD properties [39][40][41][42][43][44][45].…”