Conveners
Afternoon 42
- Dave Tanner
Mr
Pablo Quilez
(Universidad Autónoma de Madrid and IFT UAM/CSIC)
06/06/2019, 16:40
Oral
I will review recent attempts to build heavy axion models which solve the strong CP problem while enlarging the parameter space well beyond that of invisible axion models. Next, I will present a recent model of heavy axions: the first axion model solving the strong CP problem with colour unification and massless fermions. The axion scale may be not far from the TeV region which translates to...
Dr
Ohjoon Kwon
(Institute for basic science)
06/06/2019, 17:00
Oral
We, Center for Axion and Precision Physics research (CAPP), introduce a noble method of frequency tuning for the higher mass axion searching cavity using dielectric meta-material. When the dielectric slits are arranged periodically, they become a dielectric meta-material that has an effective dielectric constant which is proportional to the ratio of the period to the gap, that is, we can...
Prof.
Leonid Kuzmin
(Chalmers University of Technology, Gothenburg, Sweden)
06/06/2019, 17:20
Oral
Axions appear in extensions of the Standard Model of particle physics and may be the solution of the Dark Matter in our Universe. Several new experiments are foreseen in the next decade searching them in a wide range of the parameter space. In the mass region from few to several tens of microelectronvolt, detector sensitivity will be limited by the Standard Quantum Limit of linear amplifiers...
Dr
Soroush Shakeri
(Institute for Research in Fundamental Sciences (IPM))
06/06/2019, 17:40
Oral
The main goal of this work is to probe axion or axion-like particles (ALPs) in light-by-light forward scattering process. We consider the polarization effects caused by off-shell axions in the photon-photon scattering process. We show that the circular polarization signal generated in light-by-light scattering in the current/future laser experiments can shed more light on different aspects...
Stepan Kunc
(Technical University of Liberec)
06/06/2019, 18:00
Oral
Vacuum magnetic birefringence is a non-linear electrodynamic effect predicted as a consequence of the formulation of the Euler-Kockel-Heisenberg effective Lagrangian, first proposed in 1935, which takes into account electron-positron fluctuations. A direct laboratory observation of vacuum magnetic birefringence is still lacking today due to its value: ∆n = 4x10e-24 @ B = 1T.
Key ingredients...
Dr
Pranjal Trivedi
(University of Hamburg)
06/06/2019, 18:20
Oral
Axion-like particles (ALPs) are leading dark matter
candidates originally motivated by the strong CP problem and also
arise in theories of string compactifications. I will present a
sensitive probe for ALPs or ultra-light dark matter - the
birefringence in the cosmic microwave background (CMB). Birefringence
arises from the oscillating ALPs' effective refractive index and is
also...
