Extended Particle Theory Seminar

Thursday 29 Aug 2019, 14:00 → 17:00 Europe/Stockholm

Beurlingrummet (Ångstrom)

14:00 → 14:40 Understanding fermion masses in a gauged Froggatt-Nielsen model

Understanding the hierarchies for fermion masses and their mixings is one of the outstanding problems in particle physics. In the standard model these are simply free parameters which are fitted to experiment. Froggatt and Nielson suggested that these patterns can be understood by introducing a new flavon symmetry. In this talk I will present the consequences of making this symmetry local and briefly discuss how the arising constraints from gauge anomalies can be solved using methods from algebraic geometry and properties of elliptic curves.

Speaker: Johan Rathsman (Lund University)

GFN.pdf

14:40 → 15:00 Coffee Break

15:00 → 15:40 Rare B decays and search for new physics

The role of flavour physics in the quest for new physics, the implications of the current measurements and future perspectives will be discussed, with an emphasis on the implication of the recent anomalies observed in the LHCb measurements.

Speaker: Mahmoudi Nazila (Lyon University)

Nazila_Upssala_Aug2019.pdf

16:00 → 16:20 Minimal anomaly free U(1) extensions: constraints, prospects & outlooks

In my talk, I shall consider minimal anomaly free U(1) extensions of the Standard Model with three generations of right-handed neutrinos and a complex scalar. Then, I shall show that the parameter space of a class of such models is heavily constrained by the electroweak precision test and the LHC data. I shall also discuss the Green-Schwarz anomaly cancellation mechanism in this context and its future prospects. Finally, I shall discuss possible outlooks and future directions in terms of dark matter and collider signatures

Speaker: Tanumoy Mandal (U)

uppsala_inhouse_tanumoy.pdf

16:30 → 16:50 The mostly SM-like Higgs, mostly …

The discovered Higgs seems to be consistent with the SM; yet we expect a modified Higgs sector from BSM physics. In this talk I show how to include light scalars in the 2HDM while naturally obtaining a SM-like Higgs boson.

Speaker: Andreas Uppsala University (Ekstedt)

2HDM.pdf