Chiral Dynamics of Baryons from String Theory

By D. Hong, M. Rho, Ho-Ung Yee, Piljin Yi. 2007

188 citations recorded by the source corpus.

We study baryons in a holographic model of QCD by Sakai and Sugimoto, realized as small instantons with fundamental string hairs. We introduce an effective field theory of the baryons in the five-dimensional setting, and show that the instanton interpretation implies a particular magnetic coupling. Dimensional reduction to four dimensions reproduces the usual chiral effective action, and, in particular, we estimate the axial coupling ${g}_{A}$ between baryons and pions and the magnetic dipole moments, both of which are proportional to ${N}_{c}$. We extrapolate to finite ${N}_{c}$ and discuss subleading corrections.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d4c07c6eb107616ee2e46500cf5d2fc99ec23225

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In Nuclear and High Energy Physics

Citations in the corpus

Light-front holographic QCD and emerging confinement (2014, background): “In this top-down string approach baryons are usually described as solitons or Skyrmionlike objects [178, 179, 180].”
Dynamics of baryons from string theory and vector dominance (2007, methodology): “An abbreviated version of this work has been reported elsewhere [ 21 ] with emphasis on the derivation of the effective action.”
Baryons from instantons in holographic QCD (2007, unknown): “…using (5.26) would become very close to those listed in (5.30):‡ (nρ, nz) (0, 0) (1, 0) (0, 1) (1, 1) (2, 0)/(0, 2) (2, 1)/(0, 3) (1, 2)/(3, 0) N (l = 1) 940+ 1348+ 1348− 1756− 1756+, 1756+ 2164−, 2164− 2164+, 2164+ ∆ (l = 3) 1240+ 1648+ 1648− 2056− 2056+, 2056+ 2464−, 2464− 2464+, 2464+ (5.35)”
Holographic Baryons Static Properties and Form Factors from Gauge/String Duality (2008, methodology): “. It is interesting to note that going to the hρ2i from the ρ2 cl by multiplying the ratio (Nc + √ 5/2)/Nc for large Nc as seen from (3.33) has an eﬀect similar to the “Nc → Nc + 2” rule discussed in [16]. The value of the anomalous magnetic moment obtained with this rule from the ﬁve dimensional eﬀ”
Cold Nuclear Matter In Holographic QCD (2007, background): “To take this into account, the authors of [16] and [17] considered more general smooth instanton configurations with varying scale factor, inserting these”
Mesons in gauge/gravity duals (2007, background): “There has been considerable interest in the baryonic sector of the model recently - see the papers [164, 165, 166, 167, 168, 169, 170, 171].”