Portorož 2019: Precision era in High Energy Physics

Session

Neutrinos

17 Apr 2019, 09:00

13. The Short Baseline Neutrino Oscillation Anomalies

Joachim Kopp (CERN)

17/04/2019, 09:00

Neutrinos

We discuss the various anomalies reported in short-baseline neutrino oscillations, in particular from the LSND and MiniBooNE experiments and from reactor neutrino detectors. We critically assess explanations of these anomalies within the Standard Model and beyond. In particular, we discuss the benefits and drawbacks of models with eV-scale sterile neutrinos.

33. Global Bounds on Type III Seesaw

Jacobo Lopez Pavon (IFIC, CSIC-Universitat de València)

17/04/2019, 09:25

Neutrinos

We derive general bounds on the Type-III Seesaw parameters from a global fit to flavor and electroweak precision data. We will explore and compare three Type-III seesaw realizations: a general scenario, where an arbitrary number of heavy triplets is integrated out without any further assumption, and the more constrained cases in which only 3 or 2 additional heavy states are included and the...

25. Unbroken flavour symmetries vs lepton masses and mixings

Andrea Romanino

17/04/2019, 09:50

Neutrinos

We identify all flavour groups and representations providing an approximate description of lepton masses and mixings in the symmetric limit. Assuming the symmetry constrains the Weinberg operator, neutrinos turn out to be always either anarchical or inverted hierarchical. We investigate whether the flavour theory predictions obtained within the Weinberg operator description are equivalent to...

44. Constraints on EFT from neutrino oscillations

Adam Falkowski (LPT Orsay)

17/04/2019, 10:15

Neutrinos

We study constraints on the Standard Model Effective Field Theory (SMEFT) from neutrino oscillations in short-baseline reactor experiments. We calculate the survival probability of reactors antineutrinos at the leading order in the SMEFT expansion, that is including linear effects of dimension-6 operators. It is shown that, at this order, reactor experiments alone cannot probe charged-current...

31. Double Beta Decay and TeV Scale Physics

Dr Frank Deppisch (University College London)

19/04/2019, 11:00

Neutrinos

Neutrinoless double beta decay can significantly help to shed light on the issue of non-zero neutrino mass, as observation of this lepton number violating process would imply neutrinos are Majorana particles. However, the underlying interaction does not have to be as simple as the standard neutrino mass mechanism. The entire variety of neutrinoless double beta decay mechanisms can be...

28. Upper limits on lepton number violating particles from neutrino masses

Juan Herrero-Garcia (INFN/SISSA, Trieste)

19/04/2019, 11:25

Neutrinos

In this talk I will discuss a model-independent framework to classify and study the plethora of neutrino mass models and their phenomenology. The idea is to introduce one particle beyond the Standard Model which couples to leptons and carries lepton number, together with the lowest-dimensional lepton number violating operator, which contains this particle. Demanding the generation of neutrino...

49. Master Majorana neutrino mass parametrization

Avelino Vicente (IFIC - CSIC / U. Valencia)

19/04/2019, 11:50

Neutrinos

After discussing the general form of a Majorana neutrino mass matrix I will introduce a master parametrization for the Yukawa matrices in agreement with neutrino oscillation data. This parametrization extends previous results in the literature and can be used for any model that induces Majorana neutrino masses with the seesaw mechanism). The application of the master parametrization will be...