Gravitational form factors in the axial sector from an AdS/QCD model

Abidin, Zainul; Carlson, Carl E.

doi:10.1103/physrevd.77.115021

Cited by 51 publications

(29 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A lot of effort has been devoted in bottom-up models to estimate other QCD related properties as for example form factors, see for instance [100][101][102][103][104][105][106][107][108]. To reproduce such computations in the present setting and compare the results is an interesting problem that we leave open for the future.…”

Section: Discussionmentioning

confidence: 99%

Thermodynamics of SU(N) Yang-Mills theories in 2 + 1 dimensions II — The deconfined phase

Caselle

Castagnini

Feo

et al. 2012

J. High Energ. Phys.

View full text Add to dashboard Cite

A simple holographic model is presented and analyzed that describes chiral symmetry breaking and the physics of the meson sector in QCD. This is a bottom-up model that incorporates string theory ingredients like tachyon condensation which is expected to be the main manifestation of chiral symmetry breaking in the holographic context. As a model for glue the Kuperstein-Sonnenschein background is used. The structure of the flavor vacuum is analyzed in the quenched approximation. Chiral symmetry breaking is shown at zero temperature. Above the deconfinement transition chiral symmetry is restored. A complete holographic renormalization is performed and the chiral condensate is calculated for different quark masses both at zero and non-zero temperatures. The 0 ++ , 0 −+ , 1 ++ , 1 −− meson trajectories are analyzed and their masses and decay constants are computed. The asymptotic trajectories are linear. The model has one phenomenological parameter beyond those of QCD that affects the 1 ++ , 0 −+ sectors. Fitting this parameter we obtain very good agreement with data. The model improves in several ways the popular hard-wall and soft wall bottom-up models.

show abstract

Section: Discussionmentioning

confidence: 99%

Thermodynamics of SU(N) Yang-Mills theories in 2 + 1 dimensions II — The deconfined phase

Caselle

Castagnini

Feo

et al. 2012

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…For the density distributions of the target hadrons, P 24 (z ) in Eq. (8), we apply the gravitational form factors which can be obtained with the bottom-up AdS/QCD models [40,41]. As discussed in Refs.…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…[22], is applied arXiv:1910.10008v1 [hep-ph] 22 Oct 2019 to describe the virtual photon in the five-dimensional AdS space. For the Pomeron-nucleon coupling, we adopt the nucleon gravitational form factor which can be obtained from the bottom-up AdS/QCD model [40,41]. There are four adjustable parameters in the model, which are to be determined with the HERA data for both the F 2 and F L structure functions, focusing on the highly nonperturbative kinematic regime, where x ≤ 10 −2 and Q 2 ≤ 10 GeV 2 .…”

Section: Introductionmentioning

confidence: 99%

Photon structure functions at small x in holographic QCD

Watanabe

2015

Physics Letters B

View full text Add to dashboard Cite

We investigate the nucleon and pion gluon distribution functions in the framework of holographic QCD, focusing on the small Bjorken x region. Based on an approximate relation, the gluon distributions are extracted from structure functions of the unpolarized deep inelastic scattering which can be calculated with a holographic QCD model, assuming the Pomeron exchange. All the adjustable parameters of the model are determined with the HERA data of the proton structure functions. We explicitly show that the extracted proton gluon distribution is consistent with results of the recent global QCD analysis. The structure functions of the pion can be computed without any additional parameter, which enables us to predict its gluon distribution also. We find that the resulting pion gluon density is smaller than the proton's, and agrees with the recent global QCD analysis result within the uncertainties.

show abstract

“…There are basically two approaches: the top-down approach [25][26][27][28] starting from string theory and the bottom-up approach [29][30][31] starting from the known QCD phenomenology to construct the dual theory in the higher dimensional AdS space. Most of these works are dedicated to hadron properties such as masses, widths, decay constants [27,28,[30][31][32][33][34][35][36][37][38][39]. More systematic graviton-dilaton-meson framework has been developed in refs.…”

Section: Introductionmentioning

confidence: 99%

Elastic proton-proton scattering at LHC energies in holographic QCD

Xie

Watanabe

Huang

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

The cross sections of the high energy proton-proton scattering are studied in a holographic QCD model, focusing on the Regge regime. In our model setup, the involved nonperturbative partonic dynamics is described by the Pomeron exchange, which is realized by applying the Reggeized spin-2 particle propagator together with the proton gravitational form factor obtained from the bottom-up AdS/QCD model. Our model includes three adjustable parameters which are to be fitted by experimental data. We show that both the resulting differential and total cross sections are consistent with data, including the ones recently measured at √ s = 13 TeV by the TOTEM collaboration at the LHC. Our results imply that the present framework works well in the considered TeV scale, and further applications to other high energy scattering processes, in which the involved strong interaction can be approximated by the Pomeron exchange, are possible.

show abstract

Gravitational form factors in the axial sector from an AdS/QCD model

Cited by 51 publications

References 47 publications

Thermodynamics of SU(N) Yang-Mills theories in 2 + 1 dimensions II — The deconfined phase

Thermodynamics of SU(N) Yang-Mills theories in 2 + 1 dimensions II — The deconfined phase

Photon structure functions at small x in holographic QCD

Elastic proton-proton scattering at LHC energies in holographic QCD

Contact Info

Product

Resources

About