Holographic QCD and Pion Mass
Koji Hashimoto, Takayuki Hirayama, Akitsugu Miwa
TL;DR
This paper explores modifications to a holographic QCD model to generate realistic pion masses, successfully matching observed values and connecting to chiral perturbation theory.
Contribution
It introduces specific deformations of the Sakai-Sugimoto model that explicitly break chiral symmetry to produce finite pion masses.
Findings
Successfully reproduces observed pion mass
Provides a holographic interpretation of chiral symmetry breaking
Connects deformations to chiral perturbation theory
Abstract
To realize massive pions, we study variations of the holographic model of massless QCD using the D4/D8/anti-D8 brane configuration proposed by Sakai and Sugimoto. We propose deformations which break the chiral symmetry explicitly and compute the mass of the pions and vector mesons. The observed value of the pion mass can be obtained. We also argue a chiral perturbation corresponding to our deformation.
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