Hannover 2013 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
A: Fachverband Atomphysik
A 25: Precision spectroscopy of atoms and ions V (with Q)
A 25.1: Talk
Wednesday, March 20, 2013, 11:00–11:15, B 302
The Baryon Antibaryon Symmetry Experiment BASE — •Christian Smorra1, Kurt Franke2, Georg Schneider3, Klaus Blaum2,4, Andreas Mooser3,5, Wolfgang Quint4,6, Jochen Walz3,5, Yasunori Yamazaki1, and Stefan Ulmer1 — 1RIKEN Advanced Science Institute, Hirosawa, Wako, Saitama 351-0198, Japan — 2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany — 3Institut für Physik, Johannes-Gutenberg-Universität Mainz, D-55099 Mainz, Germany — 4Ruprecht-Karls-Universität Heidelberg, D-69047 Heidelberg, Germany — 5Helmholtz Institut Mainz, D-55099 Mainz, Germany — 6GSI-Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
The Baryon Antibaryon Symmetry Experiment (BASE) planned at the Antiproton Decelerator (AD) at CERN is dedicated to compare fundamental properties of proton and antiproton with high precision. Such matter/antimatter comparisons are sensitive tests of the CPT theorem. As one of these quantities, the g-factors of both particles are currently only compared with a moderate precision of δ g/g = 3 × 10−3, limited by the antiproton value. Recently, we succeeded in measuring the proton g-factor with a relative precision of 8.9 × 10−6 using the continuous Stern-Gerlach effect on a single proton in a cryogenic Penning trap. Using the same method on a single antiproton, we aim for a 100-fold improved CPT test with baryons. By applying the so-called double-trap technique, BASE ultimately aims for a relative precision of 10−9 or better, resulting at least in a factor of one million improved CPT test. In this talk, the BASE experiment will be presented.