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

Abstract

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.

arXiv commentLaTeX2e, 10 pages, 3 eps figures, submitted to Physics Letters B

References in corpus (2)

• Eta-Helium Quasi-Bound States
• An explanation of the ABC enhancement in the dd -> alpha X reaction at intermediate energies

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