SEPTA Meeting at Sussex

Tuesday 24 Jan 2017, 12:30 → 17:00 GMT

Pevensey 1 1A6 (University of Sussex)

Andrea Banfi (University of Sussex), Sebastian Jaeger (University of Sussex (GB))

This is the first meeting of the South-East Particle Theory Alliance, a consortium bringing together members of the theory groups of the University of Sussex, Royal Holloway University of London, and University College London. The meeting consists of 25-minute talks, each followed by 5 minutes of discussion. Each speaker is invited to present his own research highlights.

12:30 → 13:50 Lunch

13:50 → 14:15 Higgs cosmology

Speaker: Prof. Xavier Calmet (University of Sussex)

Higgs Cosmology.pdf

14:20 → 14:45 Non-Standard Mechanisms for Neutrinoless Double Beta Decay, Their Probes and Implications

In my talk I will describe the effective approach to lepton number violation and implications of potential future observation of lepton number violating (LNV) processes, primarily of neutrinoless double beta decay. The interplay between lepton number violation at high and low energies is of particular interest, as the constraints on theories of baryogenesis can be obtained. One can state that if neutrinoless double beta decay is trigerred by other than the standard mass mechanism, then the usual high-scale baryogenesis models will be excluded. As can be shown, each LNV effective operator contributes to neutrinoless double beta decay in a number of ways and the understanding of the mutual relations among all the operators is crucial when determining the dominant contribution. Moreover, the nuclear side of the problem plays an important role, as a thorough calculation of corresponding nuclear matrix elements is needed for the estimation of the effective couplings and it can also help to pinpoint the dominant mechanism triggering neutrinoless double beta decay. Apart from the effective field approach, I will also outline the possible extension of our arguments to a general UV-completed model.

Speaker: Lukas Graf

septa_meeting_graf.pdf

14:50 → 15:15 Charming new physics in rare B decays and mixing

Speaker: Kirsten Leslie (University of Sussex)

SEPTA_K_Leslie17.pdf

15:20 → 15:50 Coffee break

15:50 → 16:15 Off-shell Higgs and Higgs interference

Speaker: Nikolas Kauer (Royal Holloway, University of London)

Kauer_SEPTA.pdf

16:20 → 16:45 Supercool and very strong phase transitions

Speaker: Christopher Harman (University of Sussex)