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Scaling Behaviour of Tensor Analysing Power (Ayy) in the Inelastic Scattering of Relativistic Deuterons

We suggested a dimensionless relativistic invariant variable (R) which may be interpreted as a ratio of the excitation energy to the full transferred energy; therefore this variable measured a "degree of inelasticity" of the scattering. Existing data on the tensor analysing power of p(d,d')X and 12C(d,d')X inelastic scattering at momenta from 4.2 to 9 GeV/c are analysed in terms of this variable. We observe that Ayy taken as function of R does not depend upon the incident energy, the scattering angle (up to 30 deg. in CM frame); there is no noticeable difference between the proton and carbon targets as well. It is remarkable that Ayy is maximal when R near to 0.5-0.6 and small in absolute value when R is close to its limiting values of 0 and 1.