Form factors and wave functions of vector mesons in holographic QCD

Grigoryan, Hovhannes R.; Radyushkin, Anatoly

doi:10.1016/j.physletb.2007.05.044

Cited by 136 publications

(239 citation statements)

References 30 publications

Supporting

Mentioning

216

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

“…The AdS/QCD model is related to light-cone QCD in [237,238] allowing form factor computations. Form factors for mesons are also in [239,240].…”

Section: A Plethora Of Ads/qcd Phenomenologymentioning

confidence: 99%

Mesons in gauge/gravity duals

et al. 2008

View full text Add to dashboard Cite

Abstract. We review recent progress in studying mesons within gauge/gravity duality, in the context of adding flavour degrees of freedom to generalizations of the AdS/CFT correspondence. Our main focus is on the "top-down approach" of considering models constructed within string theory. We explain the stringtheoretical constructions in detail, aiming at non-specialists. These give rise to a new way of describing strongly coupled confining large-N gauge theories similar to large-N QCD. In particular, we consider gravity dual descriptions of spontaneous chiral symmetry breaking, and compare with lattice results. A further topic covered is the behaviour of flavour bound states in finite-temperature field theories dual to a gravity background involving a black hole. We also describe the "bottom up" phenomenological approach to mesons within AdS/QCD. Some previously unpublished results are also included.PACS. 11.15.-q Gauge field theories -11.25.Tq Gauge/string duality -12.40.Yx Hadron mass models and calculations -14.40.-n Mesons

show abstract

“…In our recent papers [24,25,26] we developed a formalism that allows to systematically study the meson form factors within the holographic "hard-wall" approach of Refs. [6,8].…”

Section: Introductionmentioning

confidence: 99%

“…[6,8]. We applied it first to form factors and wave functions of vector mesons [24,25] and then [26] to the pion electromagnetic form factor. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Pion in the holographic model with 5D Yang-Mills fields

Grigoryan

Radyushkin

2008

Phys. Rev. D

View full text Add to dashboard Cite

We study pion in the holographic model of Hirn and Sanz which contains two Yang-Mills fields defined in the background of the sliced AdS space. The infrared boundary conditions imposed on these fields generate the spontaneous breaking of the chiral symmetry down to its vector subgroup. Within the framework of this model, we get an analytic expression for the pion form factor and a compact result for its radius. We also extend the holographic model to include Chern-Simons term which is required to reproduce the appropriate axial anomaly of QCD. As a result, we calculate the anomalous form factor of the pion and predict its Q 2 -slope for the kinematics when one of the photons is almost on-shell. We also observe that the anomalous form factor with one real and one virtual photon is given by the same analytic expression as the electromagnetic form factor of a charged pion. One of the advantages of the present model is that it does not require an infrared boundary counterterm to correctly reproduce the anomaly of QCD.

show abstract

Form factors and wave functions of vector mesons in holographic QCD

Cited by 136 publications

References 30 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

Mesons in gauge/gravity duals

Pion in the holographic model with 5D Yang-Mills fields

Contact Info

Product

Resources

About