Physical Review Letters 84, 2350-2353 (2000)
Dimitre Bakalova, Bogumil Jeziorskib, Tatiana Koronab, Krzysztof Szalewiczc, and Eugeniya Tchoukovaa
a Institute for Nuclear Research and Nuclear Energy, Tsarigradsko Chaussée 72, Sofia 1784, Bulgaria
b Department of Chemistry, Quantum Chemistry Laboratory, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
c Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
Density Shift and Broadening of Transition Lines in Antiprotonic Helium
The density shift and broadening of the transition lines of antiprotonic helium have been evaluated in the impact approximation using an interatomic potential calculated ab initio with the symmetry-adapted perturbation theory. The results help to remove an uncertainty of up to 10 ppm in the laser spectroscopy data on antiprotonic helium and are of importance in experimental tests of bound state QED and CPT invariance.
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