First measurement of the tensor analysing power T20 in inelastic (d, d′)X scattering at O° on 1H and 12C at 4.5 and 5.5 GeV/c

Tensor A yy and vector A y analyzing powers in the 1H(d, d′)X and 12C(d, d′)X reactions at initial deuteron momenta of 9 GeV/c in the region of baryonic resonance excitation

“…The data of the present experiment are compared with the data taken at zero angle on hydrogen [2] given by the diamonds. One can see that the values of A yy obtained at different emission angles are in good agreement demonstrating an approximate t-scaling observed in earlier experiments [1]- [5]. The present data along with the data from previous experiments allow one to trace the general behaviour of A yy over a wide region of |t|.…”

“…The deviation of the data obtained in the previous experiments [1,4] at |t| ∼ 0.3-0.8 (GeV/c) 2 from the predictions of PWIA, as well as from dp- [21] and ed- [22] elastic scattering, indicates the sensitivity of A yy to the baryonic resonances excitation. In the framework of the multiple-scattering model, such a deviation may be due to a significant contribution of double-collision interactions corresponding to the diagrams shown in Figs.5b and 5c.…”

“…′ )X reaction in the vicinity of low masses baryonic resonances [1,2,4]. In principle, this model can be applied for the explanation of the data of present experiment, however, the knowledge of the electromagnetic properties of the baryonic resonances with the masses 2.2-2.6 GeV/c 2 is required.…”

“…Inelastic scattering of polarized deuterons on hydrogen and nuclei at high energies has been investigated during the last decade in Dubna [1]- [5] and Saclay [6,7]. The main goal of these studies is to investigate the properties of the baryonic resonances via measurements of polarization observables in the (d, d…”

“…The tensor analyzing power T 20 in the vicinity of the Roper resonance (P 11 (1440)) excitation has been measured on hydrogen and carbon targets at Dubna [1] and on hydrogen target at Saclay [6]. The measurements of T 20 in the deuteron scattering at 9 GeV/c on hydrogen and carbon have been performed for missing masses up to M X ∼ 2.2 GeV/c 2 [2].…”