Higgs mass in Noncommutative Geometry

par Pierre Martinetti (Università di Napoli Federico II)

jeudi 27 mars 2014, 11:00 → 12:00 Europe/Paris

Auditorium (Annecy-le-Vieux)

Noncommutative Geometry a la Connes [NCG] proposes a description of the Standard Model based on a "noncommutative extension" of usual geometry. In this framework, the Higgs mass is a function of the other parameters of the theory. Since the beginning of this model in the 90's, this mass was predicted around 170 GeV, a value ruled out by Tevatron in 2008. Recently, it came out that by taking into account a new scalar field (introduced from a completely different perspective by particle physicist in order to avoid some instability of the electroweak vacuum due to the quartic coupling of the Higgs field), then the computation of the Higgs mass in NCG could be made compatible with the experimental 126 GeV value. The question is thus to understand whether the introduction of this new field is just an artefact to save the model, or is intrinsically coherent. After introducing in a friendly way the basics of NCG, we will present a recent proposal allowing to get this new field in a way coherent with the principle of NCG, and study its consequence on the computation of the Higgs mass.

Slides 2014-03-Annecy-Higgs.pdf