Laser spectroscopic study on the highly excited states of antiprotonic helium

T. Kobayashi1 †, D. Barna1,2, R. S. Hayano1, Y. Murakami1, K. Todoroki1, H. Yamada1, A. Dax3, L. Venturelli4,5, N. Zurlo4,5, D. Horvath2,6, H. Aghai-Khozani7,8, A. Soter7, and M. Hori7,1 1Department of Physics, University of Tokyo, Hongo, Bunkyo-ku 113-0033, Japan 2Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, PO Box 49, Budapest, 1525, Hungary 3Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland 4Dipartimento di Ingegneria dell Informazione, Universita di Brescia, I-25123 Brescia, Italy 5INFN, Gruppo Collegato di Brescia, I-25133 Brescia, Italy 6Institute of Nuclear Research, H-4001 Debrecen, Hungary 7Max-Planck-Institut fur Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany 8CERN, CH-1211 Geneva 23, Switzerland