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Z'models and the early LHC

Prof. Fabio Zwirner, University of Padova, Italy

Date:  February 3, 2010   10:30 

Place: Room 348 / 349, Faculty of Physics at the LMU Munich, Theresienstr. 37, 80333 München

Are there plausible extensions of the Standard Model that could lead to early discoveries at the LHC? To address this general question on a concrete example, I will consider a class of minimal models with an extra massive neutral gauge boson Z'. I will first review different theoretical motivations for extending the SM gauge group with an extra U(1) factor, possibly broken near the TeV scale. I will then discuss the interplay between the bounds from electroweak precision tests and direct searches at the Tevatron, to identify the early LHC discovery potential. I will finally comment on the peculiar features of models where the Z' couples non-universally to lepton flavors and of string models with intersecting or magnetized branes.