Thresholds for intersecting D-branes revisited

Nikolas Akerblom, Ralph Blumenhagen, Dieter Lüst, Maximilian Schmidt-Sommerfeld
2007 Physics Letters B  
Gauge threshold corrections for intersecting D6-brane string models on toroidal orbifold backgrounds are reconsidered. Both by dimensionally regularising the appearing open string one-loop diagrams in tree-channel as well as by zeta-function regularisation of the corresponding loop-channel one-loop diagrams, we arrive at a result which takes into account the infrared divergence from the contribution of the massless states in the running of the gauge coupling constant as well as the contribution
more » ... as the contribution of states, which become light in certain regions of the moduli space.
doi:10.1016/j.physletb.2007.06.060 fatcat:zmdxsvzmvbhlzgeutz5wwlgsrq