### Vojtech Krejcirik

University of Maryland
###
Model independent form factors relations at large N_c

Recently, there has been a wide interest in using AdS/CFT correspondence
to construct models of baryons. On one hand, these holographic models
were successful in explaining many hadronic phenomena; on the other hand,
they differ significantly from more conventional approaches, contain
substantial amount of model building and unconstrained freedom, and are
often hard to interpret. Thus, it is crucial to have a simple pass/fail
test to check, whether some basic physical principles were encoded
correctly. One way to proceed is to exploit the fact that these models
are based on the combined large N_c and chiral limit of quantum
chromodynamics. In these two limits, many aspects of QCD simplify and
certain quantities can be even derived exactly. The model-independent
relation discussed in this talk falls precisely into this
category. Specifically, it correlates the long distance part of the
Fourier transform of the electromagnetic form factors of the nucleon. The
main goal of the presented work is to derive this relation directly in
large N_c chiral perturbation theory, and doing so honestly establish
its model independence.

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