Anomalous U(1)'s (Z' gauge bosons) and the LHC

by Pascal Anastasopoulos (Nordita)

Monday 23 Feb 2009, 15:30 → 16:30 Europe/Stockholm

A5:1041 (CoPS group room)

A general feature of Standard Model-like D-brane models is the presence of several abelian gauge fields which are superficially anomalous. The anomalies are cancelled via couplings to axions and generalized Chern-Simons terms. As a consequence, the anomalous gauge bosons become massive (and behave almost like the usual Z' gauge bosons) and the GCS couplings provide nontrivial effects, such as decays of the anomalous Z' to ZZ, Z' to Z photon, as well as non-trivial extra contributions to the SM Z to Z photon and Z to ZZ decays, which were not considered in the past in the context of Z'-models. Such effects might be visible at LHC.