Witten-Veneziano from Green-Schwarz

Details Witten-Veneziano from Green-Schwarz Witten-Veneziano from Green-Schwarz

2004-04-30

arxiv.org/abs/hep-th/0404248v2

JHEP 0406 (2004) 019

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, LaTex. 1 eps figure. v2: minor changes, refs. added, to appear in JHEP

Scientific paper

10.1088/1126-6708/2004/06/019

We consider the U(1) problem within the AdS/CFT framework. We explain how the Witten-Veneziano formula for the eta' mass is related to a generalized Green-Schwarz mechanism. The closed string mode, that cancels the anomaly of the gauged U(1) axial symmetry, is identified with the eta' meson. In a particular set-up of D3-branes on a C3/(Z3xZ3) orbifold singularity, the eta' meson is a twisted-sector R-R field.

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