An Eta Primer: Solving the U(1) Problem with AdS/QCD

Details An Eta Primer: Solving the U(1) Problem with AdS/QCD An Eta Primer: Solving the U(1) Problem with AdS/QCD

2007-05-04

arxiv.org/abs/0705.0534v2

JHEP0708:077,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 6 figures; typos fixed, references added in v2

Scientific paper

10.1088/1126-6708/2007/08/077

Inspired by the AdS/CFT correspondence, we study the pseudoscalar mesons of QCD through a dual embedding in a strongly curved extra dimensional spacetime. This model incorporates the consequences of symmetry and has very few free parameters, due to constraints from five-dimensions and the operator product expansion of QCD. Using as inputs the pion, kaon, and rho masses and fpi, we compute the eta and eta prime masses to be 520 and 867 MeV, respectively. Their decay rates into photons are also computed and found to be in good agreement with data.

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