Aldo Antognini
13/10/2010, 11:20
Precision measurements of fundamental constants
Oral
The charge radius r_p of the proton has so far been known from
electron-proton scattering with an astonishingly low precision of about 2%.
The CODATA value of r_p with an uncertainty of 1% is mainly determined
from hydrogen (H) spectroscopy data and bound-state QED calculations. The
less accurate H-independent value from e-p-scattering limits the test of
bound-state QED in hydrogen, as...
Detlev Gotta
(Forschungszentrum Jülich)
13/10/2010, 11:40
Exotic atoms and molecules
Oral
K X-rays from pionic hydrogen and deuterium as well as muonic hydrogen have been measured using a high-resolution crystal spectrometer at the E5 beam line of PSI. From the ground-state level shifts and broadenings of the hydrogen isotopes, caused by the strong interaction, low-energy parameters of QCD become accessible as are the pion-nucleon scattering lengths and the threshold production...
Dr
Bertalan Juhasz
(Stefan Meyer Institute for Subatomic Physics, Vienna, Austria)
13/10/2010, 12:00
Low energy precision tests of the Standard Model
Oral
The hydrogen atom is one of the most extensively studied atomic systems, and its ground state hyperfine splitting (GS-HFS) at 1.42 GHz has been measured with an extremely high precision of 10^-12. Therefore the antimatter counterpart of hydrogen, the antihydrogen atom, consisting of an antiproton and a positron, is an ideal laboratory for studying the CPT symmetry.
Kostelecky and his...
Dr
Arthur Olin
(TRIUMF/UVic)
13/10/2010, 12:20
Exotic atoms and molecules
Oral
Spectroscopy of antihydrogen has the potential to yield high-precision
tests of the CPT theorem and shed light on the matter-antimatter
imbalance in the Universe. We will describe the progress made in the
production of a trapped sample of antihydrogen atoms at CERN's
Antiproton Decelerator. Sensitive diagnostics of the temperatures,
sizes, and densities of the trapped antiproton and...
