Subject：Antiprotonic Helium Spectroscopy

Speaker：Dr. Vladimir I. Korobov（ Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research (JINR, Russia) ）

Time：10:00-11:30am,11th May,2016

Place：lecture hall,4F, Pinbiao Building of Institute，WIPM

About the speaker：

Education and Degrees:

1974-1979: Department of Mechanics and Mathematics, Moscow State University.

1979: M.S. (in Mathematics): "The Vietoris Theorem in Homology and Cohomology Theories", Department of Mechanics and Mathematics, Moscow State University.

1989: Ph.D. (in Theoretical and Mathematical Physics): "Variational Approach to the Three-Body Problem and Its Application to the Muon Catalyzed Fusion", Laboratory of Computing Techniques and Automation, JINR Dubna.

2006: Doctor of Science (in Theoretical Physics): "Variational Methods in the Quantum Three--Body Problem and Precision Spectroscopy", Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna.

Professional Record:

1979-1985: Engineer, Research Institute "Atoll", Dubna.

1985-1991: Junior Scientist, Laboratory of Computing Techniques and Automation, JINR, Dubna.

1991-2000: Senior Scientist, Laboratory of Nuclear Problems, JINR, Dubna.

2000-2006: Senior Scientist, Bogoliubov Laboratory of Theoretical Physics, JINR Dubna.

2006-present: Leading Scientist, Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna.

Abstract：

Antiprotonic helium is an exotic atom comprised of an electron, proton and helium nucleus. Surprisingly, it demonstrates high longevity and allows to obtain precision spectroscopic data. These data has been used in the resent CODATA adjustments to infer the atomic mass of an electron.

In our talk we want to discuss present status of theory and experiment in modern studies of the antiprotonic helium. The essential peculiarity of the system is that all the states of spectroscopic interest are imbedded into the continuum and thus should be considered as resonances. That impose serious challenges on accurate numerical treatment of such states. We show how systematic employing of the Complex Coordinate Rotation (CCR) approach allows to make highly relevant theoretical predictions. The problems, which are to be solved in order to improve the spectroscopic precision, will also be considered.