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"Noncommutative field theories, CPT, tachyons and all that"

Relatore: Prof. Miguel Vazquez-Mozo- Cern (Ginevra)

Aula Einstein
02 Dicembre 2003 ore 15.30

I will study general properties of noncommutative field theories and in particular the extension of Wightman axioms to this context. I will present a proof of the CPT theorem for theories with space-space noncommutativity and analyze questions associated to the spin-statistics connection. Finally, I study N=4 noncommutative SYM theories softly broken to N=0 and show how some of the problems derived from UV/IR mixing can be tamed in this case, at the price of introducing a massive fine tuning of the soft-breaking masses.