Antihydrogen formation in low energy collisions of antiproton with excited positronium

Anh-Thu Le, Chii-Dong Lin
(Department of Physics, Cardwell Hall, Kansas State University, Manhattan, Kansas 66506)

We present the hyperspherical close coupling calculation for the antihydrogen formation in low energy \bar p-Ps(n=2-10) collisions. The recently proposed diabatization procedure is used to drastically reduce the number of channels included in the calculations, thus makes the computation tractable. For low excited states our cross sections agree quite well with other theoretical results. Furthermore, the results indicate that the formation cross sections scale like n^4 and increase drastically at low collision energies.

This work was supported by the Chemical Sciences, Geosciences and Biosciences Division,
Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy.

Submitted to DAMOP, May 2004 in Tucson, AZ.

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