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- W3100505622 endingPage "019" @default.
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- W3100505622 abstract "We study gauge threshold corrections for systems of fractional branes at local orientifold singularities and compare with the general Kaplunovsky-Louis expression for locally supersymmetric = 1 gauge theories. We focus on branes at orientifolds of the 3/4, 3/6 and 3/6' singularities. We provide a CFT construction of these theories and compute the threshold corrections. Gauge coupling running undergoes two phases: one phase running from the bulk winding scale to the string scale, and a second phase running from the string scale to the infrared. The first phase is associated to the contribution of = 2 sectors to the IR β functions and the second phase to the contribution of both = 1 and = 2 sectors. In contrast, naive application of the Kaplunovsky-Louis formula gives single running from the bulk winding mode scale. The discrepancy is resolved through 1-loop non-universality of the holomorphic gauge couplings at the singularity, induced by a 1-loop redefinition of the twisted blow-up moduli which couple differently to different gauge nodes. We also study the physics of anomalous and non-anomalous U(1)s and give a CFT description of how masses for non-anomalous U(1)s depend on the global properties of cycles." @default.
- W3100505622 created "2020-11-23" @default.
- W3100505622 creator A5029446708 @default.
- W3100505622 creator A5082979114 @default.
- W3100505622 date "2009-09-02" @default.
- W3100505622 modified "2023-10-06" @default.
- W3100505622 title "Gauge threshold corrections for local orientifolds" @default.
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- W3100505622 doi "https://doi.org/10.1088/1126-6708/2009/09/019" @default.
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