@article {69, title = {カスプトラップを用いた反水素研究}, journal = {陽電子科学}, volume = {4}, year = {2015}, month = {Feb.}, pages = {49-59}, chapter = {49}, abstract = {

In this review, we describe a planned experiment of the Atomic Spectroscopy And Collisions Using Slow Antiprotons (ASACUSA) collaboration at CERN to test CPT symmetry via atomic beam spectroscopy of the ground-state hyperfine splitting of antihydrogen using a cusp trap. The cusp trap which consists of a superconducting anti-Helmholtz coil and a stack of ring electrodes, is expected to produce a spin-polarized antihydrogen beam. Recently, the ASACUSA collaboration succeeded in producing antihydrogen atoms in the cusp trap and extracting an antihydrogen beam. This paves the way towards precision in-flight spectroscopy of the antihydrogen atom.

}, keywords = {Antihydrogen, ASACUSA, Atomic beam, CPT symmetry, cusp trap, non-neutral plasma}, author = {Yugo Nagata and Naofumi Kuroda} } @article {67, title = {Spectroscopy apparatus for the measurement of the hyperfine structure of antihydrogen}, journal = {Hyperfine Interactions}, year = {2014}, pages = {1-6}, keywords = {Antihydrogen, CPT symmetry, Hyperfine spectroscopy}, issn = {0304-3843}, doi = {10.1007/s10751-014-1013-z}, url = {http://dx.doi.org/10.1007/s10751-014-1013-z}, author = {Malbrunot, C. and Caradonna, P. and Diermaier, M. and Dilaver, N. and Friedreich, S. and Kolbinger, B. and Lehner, S. and Lundmark, R. and Massiczek, O. and Radics, B. and Sauerzopf, C. and Simon, M. and Widmann, E. and Wolf, M. and W{\"u}nschek, B. and Zmeskal, J.} } @article {57, title = {CPT symmetry tests with cold p{\textasciimacron} and antihydrogen}, journal = {Annalen der Physik}, volume = {525}, year = {2013}, pages = {493{\textendash}504}, abstract = {

Precision comparisons of the properties of particles and their corresponding antiparticles are highly relevant because the Standard Model of elementary particle physics, a local, Lorentz-invariant field theory, is necessarily symmetric with respect to the combined CPT operation. This symmetry defines exact equality between the fundamental properties of particles and their anti-images. Any measured and confirmed violation constitutes a significant challenge to the Standard Model. Recent results of different CPT-tests are summarized, with emphasis to the high-precision measurement of the magnetic moment of the proton and the antiproton, as well as the precision investigation of antihydrogen ground state hyperfine splitting.

}, keywords = {antimatter, CPT symmetry, Fundamental Interactions}, issn = {1521-3889}, doi = {10.1002/andp.201300060}, url = {http://dx.doi.org/10.1002/andp.201300060}, author = {Yamazaki, Yasunori and Ulmer, Stefan} }