APS April Meeting 2017
Volume 62, Number 1
Saturday–Tuesday, January 28–31, 2017;
Washington, DC
Session B8: Ultralight Dark Matter
10:45 AM–12:33 PM,
Saturday, January 28, 2017
Room: Delaware B
Sponsoring
Unit:
GPMFC
Chair: Marianna Safronova, University of Delaware
Abstract ID: BAPS.2017.APR.B8.2
Abstract: B8.00002 : The axion dark matter search at CAPP: a comprehensive approach.
11:21 AM–11:57 AM
Preview Abstract
Abstract
Author:
Yannis Semertzidis
(KAIST/IBS)
Axions are the result of a dynamic field, similar to Higgs field, invented
to solve the so-called Strong CP-problem, i.e., why the electric dipole
moment (EDM) of the neutron and proton has not been observed so far even
though the theory of QCD predicts values by about ten order of magnitude
larger than current experimental limits. ~Axions as dark matter can be
thought of as an oscillatory field interacting extremely weakly with normal
matter. ~The oscillation frequency is unknown, it can be anywhere between
$f \quad =$ 200MHz to 200GHz and it's expected to be at a very narrow line, about
d$f$/$f=$10\textasciicircum -6. ~A strong magnetic field can be used to convert
part of that field into a very weak electric field oscillating at the same
frequency and phase as the axion field. ~In the coming years we plan to
develop our experimental sensitivity to either observe or refute the axions
as a viable dark matter candidate in a wide axion mass range. ~That approach
includes the development of ultra strong magnets, high quality resonators in
the presence of strong B-fields, new resonator geometries, low noise
cryo-amplifiers and new techniques of detecting axions. ~
Another related subject, through the strong CP-problem, is the search for
the EDM of the proton, improving the present sensitivity on hadronic EDMs by
more than three orders of magnitude to better than 10\textasciicircum
\textbraceleft -29\textbraceright $e$-cm. Usually the study of EDM involves the
application of strong electric fields and originally neutral systems were
thought to be easier to work with. Recently it became clear that charged
particles in all-electric storage rings can be used for sensitive EDM
searches by using techniques similar to the muon g-2 experiment. The high
sensitivity study of the proton EDM is possible due to the high intensity
polarized proton beams readily available today, making possible to reach
10$^{3\, }$TeV in New Physics scale.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2017.APR.B8.2