Abstract
An effective diquark model is constructed for protonium annihilation into two meons. Branching ratios are calculated and compared with experimental data. The agreement is within two standard deviations.
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References
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On leave from Nuclear Physics Institute, CS-25068 Rěz, Czechoslovakia
We are grateful to our colleagues Claude Amsler, Curtis Meyer and Peter Truöl for clarfying many experimental aspects. We thank Yang Lu for a helpful discussion and Roland Rosenfelder for critically reading the manuscript. One of us (A.C.) is also grateful for the financial support from the Swiss National Science Foundation which allowed his stay at PSI.