On the Couplings of Vector Mesons in AdS/QCD

Hong, Sungho; Yoon, Sukjin; Strassler, Matthew J.

doi:10.1088/1126-6708/2006/04/003

Cited by 104 publications

(184 citation statements)

References 27 publications

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“…Equally, one could replace A µ by its non-normalizable solution giving the coupling of the two scalars to a flavour gauge boson. These form factors are explicitly computed for the N = 2 theory in [75] (see also [83]). There the form factors are also Fourier transformed to position space to give an estimate of the effective size of the mesons.…”

Section: Interactionsmentioning

confidence: 99%

Mesons in gauge/gravity duals

et al. 2008

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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 Some previously unpublished results are also included.PACS. 11.15.-q Gauge field theories -11.25.Tq Gauge/string duality -12.40.Yx Hadron mass models and calculations -14.40.-n Mesons

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Section: Interactionsmentioning

confidence: 99%

Mesons in gauge/gravity duals

et al. 2008

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“…If we expand the non-normalizable modes, corresponding to the source, in the basis of normalizable modes of bulk solutions as a sum of infinite tower of (axial) vector mesons (see figure 2), using the decomposition formula [19], we get for the vector and axial vector correlators, respectively, following the notations in [2],…”

Section: Jhep08(2015)066 2 Meson Massesmentioning

confidence: 99%

“…The (low-energy) effective action for the holographic baryons is given in powers of momentum by the AdS/CFT correspondence as [5,24], 19) where B is the 5d bulk spinor with a position-dependent mass m b (z), e A M is the vielbein, satisfying g M N = e A M e B N η AB , and the Dirac matrices satisfy Γ A , Γ B = 2η AB . The covariant derivative…”

Section: Jhep08(2015)066mentioning

confidence: 99%

Holographic estimate of electromagnetic mass

Hong

2015

J. High Energ. Phys.

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Using the gauge/gravity duality, we calculate the electromagnetic contributions to hadron masses, where mass generates dynamically by strong QCD interactions. Based on the Sakai-Sugimoto model of holographic QCD we find that the electromagnetic mass of proton is 0.48 MeV larger than that of neutron, which is in agreement with recent lattice results. Similarly for pions we obtain m π ± − m π 0 = 1.8 MeV, roughly half of the experimental value. The electromagnetic mass of pions is found to be independent of N c and 't Hooft coupling and its scale is set only by the Kaluza-Klein scale of the model, M KK = 949 MeV.

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“…We can use these bulk Green functions to obtain convenient expressions for the bulk-toboundary propagators by generalizing the argument in [20]. First observe that the following Green's identities hold, as can be explicitly verified using (3.15)-(3.17), (3.20), (3.21).…”

Section: Normalizable Modes Masses and Decay Constantsmentioning

confidence: 90%

Successes and failures of a more comprehensive hard wall AdS/QCD

Domokos

Harvey

Royston

2013

J. High Energ. Phys.

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We explore corrections to the "hard wall" gravity dual of QCD with two-form tensor fields b M N . These fields correspond to the quark bilinear O T =qσ µν q of QCD, which generates states with quantum numbers 1 −− and 1 +− , or ω/ρ-like and h 1 /b 1 -like mesons, respectively. We include new interaction terms, which render the model complete up to dimension six. We find that breaking chiral symmetry induces modifications to the spectrum, by mixing the vector current J V and O T , and breaking the degeneracy of the 1 −− and 1 +− spectra. We also compute the b 1 → ωπ decay rate and D/S ratio and the couplings of excited ρ states to two pions, performing a comprehensive new fit to the QCD data. We obtain a value for the magnetic susceptibility of the QCD quark condensate which is consistent with phenomenological estimates. These results allow us to evaluate the success of dimension counting and UV matching in this model.

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On the Couplings of Vector Mesons in AdS/QCD

Cited by 104 publications

References 27 publications

Mesons in gauge/gravity duals

Mesons in gauge/gravity duals

Holographic estimate of electromagnetic mass

Successes and failures of a more comprehensive hard wall AdS/QCD

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