Hadronic spectra from deformed AdS backgrounds *

Abstract

Because of the presence of modified warp factors in metric tensors, we use deformed AdS 5 spaces to apply the AdS/CFT correspondence to calculate the spectra for even and odd glueballs, scalar and vector mesons, and baryons with different spins. For the glueball cases, we derive their Regge trajectories and compare them with those related to the pomeron and the odderon. For the scalar and vector mesons, as well as baryons, the determined masses are compatible with the PDG. In particular, for these hadrons we found Regge trajectories compatible with another holographic approach as well as with the hadronic spectroscopy, which present an universal Regge slope of approximately 1.1 GeV2.

Fluctuation and dissipation from a deformed string/gauge duality model

“…In Refs. [70][71][72][73][74][75][76]78] this metric was used to study many aspects of holographic high energy physics. In these references, k is a constant that can be related to Λ QCD .…”

“…Within this approach one can calculate quarkantiquark potential at zero and finite temperature, hadronic spectra, etc. [70][71][72][73][74][75][76][77][78][79].…”

“…The main goal of this work is to study zero and finite temperature string fluctuations using a deformed AdS space with the introduction of an exponential factor exp k=r 2 in the metric, motivated by the success of this approach to hadronic physics [70][71][72][73][74][75][76][77][78][79]. We calculate thermal fluctuations, the admittance from linear response, and two-point functions, and we show explicitly that the fluctuationdissipation theorem holds in this setup.…”

Proton structure functions from an AdS/QCD model with a deformed background

“…Such a deformation was considered before in a wide range of AdS/ QCD studies, as can be seen in Refs. [48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]. Our DIS structure functions are compared with experimental data showing good agreement for large x.…”

“…[48,49] where this warp factor was introduced in the AdS metric to obtain the quark-antiquark potential. This model was used recently to obtain the hadronic spectrum of particles with various spins including spin 1=2 fermions [59], which is relevant to the present discussion of DIS with baryonic target (see our discussion in Sec. III B).…”