Tachyon-Free Non-Supersymmetric Strings on Orbifolds

Details Tachyon-Free Non-Supersymmetric Strings on Orbifolds Tachyon-Free Non-Supersymmetric Strings on Orbifolds

2007-11-26

arxiv.org/abs/0711.4108v1

Int.J.Mod.Phys.A23:4371-4386,2008

Physics

High Energy Physics

High Energy Physics - Theory

17 pages

Scientific paper

10.1142/S0217751X08042304

We discuss tachyon-free examples of (Type IIB on) non-compact non-supersymmetric orbifolds. Tachyons are projected out by discrete torsion between orbifold twists, while supersymmetry is broken by a Scherk-Schwarz phase (+1/-1 when acting on space-time bosons/fermions) accompanying some even order twists. The absence of tachyons is encouraging for constructing non-supersymmetric D3-brane gauge theories with stable infrared fixed points. The D3-brane gauge theories in our orbifold backgrounds have chiral N = 1 supersymmetric spectra, but non-supersymmetric interactions.

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