Note on the strong CP problem from a 5-dimensional perspective

Details Note on the strong CP problem from a 5-dimensional perspective Note on the strong CP problem from a 5-dimensional perspective

2007-05-29

arxiv.org/abs/0705.4307v2

Phys.Rev.D77:096004,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, no figures

Scientific paper

10.1103/PhysRevD.77.096004

We consider 5 dimensional gauge theories where the 5th direction is compactified on an interval. The Chern-Simons (CS) terms (favored by naive dimensional analysis) are discussed. A simple scenario with an extra U(1)_X gauge field that couples to SU(3)_{color} through a CS term in the bulk is constructed. The extra component of the Abelian gauge field plays a role of the axion, which in the standard manner solves the strong CP problem easily avoiding most of experimental constraints. This version has an expanded discussion of the phenomenology of the model and various clarifications in the estimation of the operator coefficients in the appendix.

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