Conveners
T, C, P, CP and CPT symmetries
- Eberhard Widmann (Austrian Academy of Sciences (AT))
T, C, P, CP and CPT symmetries
- Johann Marton (Austrian Academy of Sciences (AT))
The ground-state hyperfine splitting of antihydrogen promises one of the most sensitive tests of
CPT symmetry. The ASACUSA collaboration is pursuing a measurement of this splitting in a Rabitype experiment using a polarized beam.
The antihydrogen atom beam is formed in a dedicated CUSP trap, which mixes antiprotons provided by the antiproton decelerator at CERN and positrons from a 22Na based...
The Baryon Antibaryon Symmetry Experiment (BASE) at the antiproton decelerator of CERN is dedicated to high-precision measurements of the fundamental properties of protons and antiprotons. Using single-particle multi-Penning-trap techniques, we measure their charge-to-mass ratios, magnetic moments and lifetimes. Comparing these properties of the antiproton with the proton results in stringent...
In ultrarelativistic heavy-ion collisions a large and equal amount of nuclei and anti-nuclei is produced in the central pseudorapidity region allowing for a precise investigation of their properties. Mass and binding energy are expected to be the same in nuclei and anti-nuclei as long as the CPT invariance holds for the nuclear force, a remnant of the underlying strong interaction between...
The KLOE-2 experiment at the INFN Laboratori Nazionali di Frascati has concluded the data-taking at the e+e- DAPHNE phi-factory with more than 5 fb-1 of integrated luminosity collected. Record performance in terms of 2.4 x 10^32 cm-2s-1 peak luminosity and 14 pb-1 maximum daily integrated luminosity were achieved with the crab waist scheme of beam collisions.
KLOE-2 represents the continuation...
The Electric Dipole Moment (EDM) of elementary particles, including hadrons, is
considered as one of the most powerful tool to study CP-violation beyond the Standard Model.
Such CP-violating mechanisms are searched for to
explain the dominance of matter over anti-matter in our universe.
Up to now EDM experiments concentrated on neutral systems, namely neutron, atoms and
molecules. Storage...
The CPT theorem, which holds for quantum field theories, and also for current string/membrane models, implies that the laws of physics are invariant under CPT, which thereby becomes an exact elaborated version of time reversal symmetry. We explore the possibility that CPT is also a symmetry of the physical state or ensemble. In this scenario, there is a central time with a matter dominated...
A model of Leptogenesis with tree-level decay processes of heavy right-handed Majorana neutrinos into leptons and anti-Leptons in the presences of a temperature dependent CPT violating background field $B_{0}$. Approximate analytic solutions of the Boltzmann equations show that in the presence of such a background field an asymmetry is generated between the Lepton and anti-Leptons at...
The VIP experiment aims to perform high precision tests of the Pauli Exclusion Principle (PEP) for electrons, and look for a possible small violation. The method consists in circulating a current in a copper strip, searching for the X radiation emission due to a prohibited transition (from the 2p level to the 1s level when this is already occupied by two electrons). The energy of the...
Remnant generalized cp symmetries can be a powerful tool to obtain predictions for the lepton mixing matrix in a model-independent way. Here I will present the method in some detail and will present a series of works in which this tool is used in several aprticular scenarios.
