The leading term of the He$-\bar{p}\mbox{He}^+$ long-range interaction

Abstract

The long range interaction between an antiprotonic helium atom $\bar{p}$He${}^{+}$ and helium atom in its ground state is studied. We calculate the dispersion coefficients $C_6$ using the Complex Coordinate Rotation (CCR) formalism in order to comply with the resonant nature of metastable states of the antiprotonic helium. We present as well numerical data on static dipole polarizabilities of antiprotonic helium states. The obtained coefficients $C_6$ may be used to estimate the collisional shift and broadening of transition lines in a low density precision spectroscopy of the antiprotonic helium.

References in corpus (3)

• Two-photon laser spectroscopy of antiprotonic helium and the antiproton-to-electron mass ratio
• Physics at CERN's Antiproton Decelerator
• The static and dynamic polarisability, and the Stark and black-body radiation frequency shifts of the molecular hydrogen ions H2+, HD+, and D2+