Abstract

We present a diabatization technique in combination with the recently developed hyperspherical close coupling (HSCC) method. In contrast to the strict diabatization, our simple diabatization procedure transforms only sharp avoided crossings in the adiabatic hyperspherical potential curves into real crossings. With this approach, the weak collision channels can be removed from the close-coupling calculations. This method is used to study the antiproton-hydrogen collision at low energies. In the case of a scaled down (anti)proton mass, we show that a 10-channel calculation is enough to obtain converged cross sections at low energies. The results also indicate that protonium formation occurs mostly to the lowest states of the different excited protonium manifolds.

Department(s)

Physics

Keywords and Phrases

Charge Transfer; Elasticity; Ground State; Hamiltonians; Hydrogen; Kinetic Energy; Matrix Algebra; Quantum Theory, Adiabatic Potential Curves; Antihydrogen; Collision Channels; Hyperspherical Close Coupling (HSCC) Method, Protons

International Standard Serial Number (ISSN)

1050-2947

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2004 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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