Softly Broken MQCD and the Theta Angle

Details Softly Broken MQCD and the Theta Angle Softly Broken MQCD and the Theta Angle

1997-11-05

arxiv.org/abs/hep-th/9711030v2

Phys.Lett. B421 (1998) 131-138

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, references added. Version published in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(97)01587-6

We consider a family of non-supersymmetric MQCD five-brane configurations introduced by Witten, and discuss the dependence of the curves on the microscopic theta angle and its relation with CP. We find evidence for a non-trivial spectral flow of the curves (vacua) and for the level-crossing of adjacent curves at a particular value of the theta angle, with spontaneous breaking of CP symmetry, providing an MQCD analogue of the phase transitions in theta proposed by 't Hooft.

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