# ICRC2015

July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

## Neutrino properties, mass hierarchy, and CP-violation

Aug 5, 2015, 9:45 AM
45m
World Forum Theater (World Forum)

### World Forum Theater

#### World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Invited Review talk NU-TH

### Speaker

Alexei Smirnov (ICTP)

### Description

All what we know about neutrinos with high confidence fits well the three-neutrino paradigm: 3 massive and mixed neutrinos with interactions described by the Standard Model. The paradigm is challenged by possible existence of new neutrino species - sterile neutrinos and new (non-standard'') interactions. The outstanding unknowns include the type of neutrino mass ordering (hierarchy) and value of the CP-violation phase. Possibilities to determine these unknowns using the astrophysical and atmospheric neutrinos will be considered. It appears that studies of the atmospheric neutrinos with future large underice/water detectors, like PINGU and ORCA, have a good chance to determine the hierarchy first. The hierarchy can be established from analysis of the Galactic supernova neutrino bursts. Although it is believed that the CP phase will be measured using accelerator neutrinos, a possibility should be explored to determine the phase with atmospheric neutrinos and low, (0.5 - 1) GeV, energy threshold upgrades of PINGU and ORCA.
Collaboration -- not specified -- 1073

### Presentation materials

 hague15ff.pdf hague15ff.pptx