Holographic QCD beyond the leading order

Details Holographic QCD beyond the leading order Holographic QCD beyond the leading order

2008-04-17

arxiv.org/abs/0804.2710v2

JHEP 0806:094,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 1 figure, 3 tables, accepted by JHEP

Scientific paper

10.1088/1126-6708/2008/06/094

We consider a holographic QCD model for light mesons beyond the leading order in the context of 5-dim gauged linear sigma model on the interval in the AdS$_5$ space. We include two dimension-6 operators in addition to the canonical bulk kinetic terms, and study chiral dynamics of $\pi$, $\rho$, $a_1$ and some of their KK modes. As novel features of dim-6 operators, we get non-vanishing Br$(a_1 \to \pi \gamma)$, the electromagnetic form factor and the charge radius of a charged pion, which improve the leading order results significantly and agree well with the experimental results.

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