Study of the ABC Enhancement in the d d -> alpha X reaction

Details Study of the ABC Enhancement in the d d -> alpha X reaction Study of the ABC Enhancement in the d d -> alpha X reaction

1998-10-16

arxiv.org/abs/nucl-ex/9810010v1

Phys.Lett.B445:423-427,1999

Physics

Nuclear Physics

Nuclear Experiment

LaTeX2e, 10 pages, 3 eps figures, submitted to Physics Letters B

Scientific paper

10.1016/S0370-2693(98)01464-6

The polarized d d -> alpha X reaction at beam energies close to the eta threshold shows very strong structure in the missing mass corresponding to the ABC enhancement. The deuteron tensor analysing power A_yy, and the slope of the vector analysing power A_y with respect to angle, have been measured for this reaction around the forward direction. Both signals are small, and their variations with the alpha-particle momentum are in broad agreement with a theoretical model in which each pair of nucleons in the projectile and target deuterons undergoes pion production through the NN -> d pi reaction.

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