FCNC Processes from D-brane Instantons

Details FCNC Processes from D-brane Instantons FCNC Processes from D-brane Instantons

2010-07-27

arxiv.org/abs/1007.4770v3

JHEP 1102:079,2011

Physics

High Energy Physics

High Energy Physics - Theory

28 pages, 13 figures, reference added, 1 typo corrected, style file added

Scientific paper

10.1007/JHEP02(2011)079

Low string scale models might be tested at the LHC directly by their Regge resonances. For such models it is important to investigate the constraints of Standard Model precision measurements on the string scale. It is shown that highly suppressed FCNC processes like K0- bar K^0 oscillations or leptonic decays of the D0-meson provide non-negligible lower bounds on both the perturbatively and surprisingly also non-perturbatively induced string theory couplings. We present both the D-brane instanton formalism to compute such amplitudes and discuss various possible scenarios and their constraints on the string scale for (softly broken) supersymmetric intersecting D-brane models.

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