Measurement of the tensor analyzing power Ayy in the inelastic scattering of deuterons in the vicinity of excitation of baryonic resonances

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 results on the tensor A yy and vector A y obtained at 9 GeV/c and 85 mrad [4] and at 5 GeV/c and 178 mrad [5] have been satisfactorily explained in the framework of the PWIA approach [12] (see diagram in Fig. 5a).…”

“…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.…”

“…The experiment has been performed using the polarized deuteron beam at the Dubna Synchrophasotron and the SPHERE setup [3,4] described elsewhere and shown in Fig.1. The polarized deuterons were produced by the ion source POLARIS [13].…”

“…It was pointed out that the spin-dependent part of the N N → N N * (∼ 2.2 GeV/c 2 ) amplitude is significant. Recent measurements of the tensor A yy and vector A y analyzing powers in the vicinity of the excitation of baryonic resonances with masses up to ∼ 1.8 GeV/c 2 [4,5] demonstrated large spin effects and the sensitivity to the baryonic resonances properties. The exclusive measurements in the H(d, d…”