Conveners
Plenary presentations
- Andreas Ringwald (DESY)
Prof.
Eung Jin Chun
(Korea Institute for Advanced Study)
19/06/2018, 14:30
Presentation
We show how an accidental U(1) Peccei-Quinn symmetry can arise
in a realistic Pati-Salam unified theory of flavour. A QCD axion arises from a linear combination of A4 triplet favons, which are responsible for fermion flavour structures and thus specific favour-violating couplings of the axion are predicted. We discuss the prospect of probing such a flavourful axion in future experiments.
Dr
Woohyun Chung
(CAPP/IBS)
19/06/2018, 14:50
Presentation
CAPP’s flagship axion experiment, CULTASK, employs dilution refrigerators to lower the physical temperature of resonant cavities to less than 40 mK - the coldest ever for axion search. We prepared a complete experimental setup (CAPP-PACE) equipped with an 8 T superconducting magnet with 12 cm inner bore in order to search for axions with mass around 10 µeV. The frequency tuning system...
Dr
Bela Majorovits
(MPI für Physik)
19/06/2018, 15:10
Presentation
The Axion is the hypothetical low-mass boson predicted by the Peccei-Quinn mechanism solving the strong CP problem. It is naturally also a cold dark matter candidate, thus it could simultaneously solve two major problems of nature. Up to recently there was no existing experimental effort aiming to detect QCD axions in the mass range around 100 ueV, preferred by models in which the Peccei-Quinn...
Gulden Othman
(University of North Carolina at Chapel Hill)
19/06/2018, 15:30
Presentation
The MAJORANA DEMONSTRATOR is currently searching for neutrinoless double-beta decay in $^{76}$Ge and will demonstrate the feasibility to deploy a tonne-scale experiment in a phased and modular fashion. It consists of two modular arrays of natural and $^{76}$Ge-enriched germanium detectors totaling 44.1 kg, of which 29.7 kg is enriched, located at the 4850' level of the Sanford Underground...
Anne Ernst
(Desy)
19/06/2018, 15:50
Presentation
Non-supersymmetric Grand Unified $SO(10)\times U(1)_{\rm PQ}$ models have all the ingredients to solve several fundamental
problems of particle physics and cosmology -- neutrino masses and mixing, baryogenesis, the non-observation of strong CP violation, dark matter, inflation -- in one stroke. The axion - the pseudo Nambu-Goldstone boson arising from the
spontaneous breaking of the...
Adam Scherlis
(Stanford)
19/06/2018, 16:10
Presentation
For the minimal QCD axion model it is generally believed that overproduction of dark matter constrains the axion mass to be above a certain threshold, or at least that the initial misalignment angle must be tuned if the mass is below that threshold. We demonstrate that this is incorrect. During inflation, if the Hubble scale is low, the axion tends toward an equilibrium. This means the...
