Analyzing power in d↑C→pX and d↑C→pp(d)X reactions for fast protons scattered at large angles

Measurements of the vector analyzing power, Ay, for d↑C→pX reaction at deuteron energies 1.2, 1.6, 2.0 and 4.2 GeV and for d↑C→pp(d)X reaction at 1.6 GeV are reported. The protons were detected at a large angle in kinematic region forbidden for scattering on free protons. Inclusive data are in good agreement with the previous p↑C→pX measurements. Some simple scaling for Ay is demonstrated. The strong correlation between Ay value and the energy of forward protons (deuterons) was found for d↑C→pp(d)X reaction. It seems possible to separate the contributions of two different mechanisms of fast proton production at large angles. 16 refs.; 5 figs.; 1 tab