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Observation of coherent pi(0) electroproduction on deuterons at large momentum transfer

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2003-12-01
Tomasi-Gustafsson, E
Bimbot, L
Danagoulian, S
Gustafsson, K
Mack, D
Mkrtchyan, H
Rekalo, MP
The first experimental results for the coherent pi(0) electroproduction on a deuteron, e + d --> e + d + pi(0), at large momentum transfer, are reported. The experiment was performed at Jefferson Laboratory at an incident electron energy of 4.05 GeV. A large pion production yield has been observed in the kinematical region 1.1 < Q(2) < 1.8 GeV2, from the threshold to 200-MeV excitation energy in the dpi(0) system. The Q(2) dependence is compared with theoretical predictions. (C) 2003 MAIK "Nauka/Interperiodica".