FCNC processes from D-brane instantons

Ralph Blumenhagen, Andreas Deser, Dieter Lüst
2011 Journal of High Energy Physics  
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
more » ... 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.
doi:10.1007/jhep02(2011)079 fatcat:wpshe7mslzhtlno7yiwigolus4