Abstract
A new procedure is devised to evaluate the proton form-factor at the ¯pp threshold from experimental data on ¯pp→e + e − annihilation at rest. Comparison of the ¯pp→e + e − and¯pp→π +π− processes reveals that annihilation ranges for various channels are ranked in line with quark dynamics.
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This work has been funded in part by the German Federal Minister for Research and Technology (BMFT) under the contract number 06HD756
We are grateful to S.J. Brodsky, E. Klempt, H.J. Pirner, B. Povh and T. Shibata for useful discussions. This work has been done while one of the authors (B.K.) was visiting the Institut für Theoretische Physik and the Max-Planck-Institut für Kernphysik in Heidelberg. It is a pleasure to thank the staff of these Institutes for their kind hospitality. The support from the BMFT under contract number 06HD756 is gratefully acknowledged.
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Kerbikov, B., Kondratyuk, L.A. The\(\bar pp \to e^ + e^ - \) reaction at rest and the hierarchy of the annihilation ranges. Z. Physik A - Hadrons and Nuclei 340, 181–185 (1991). https://doi.org/10.1007/BF01303830
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DOI: https://doi.org/10.1007/BF01303830