ИСТИНА

SPIN OBSERVABLES OF pd ELASTIC SCATTERING AT 20 – 50 GeV/c WITHIN THE GLAUBER MODEL AND pN AMPLITUDES 17 Oct 2020, 10:15 25m Online Oral report Section 4. Relativistic nuclear physics, elementary particle physics and high-energy physics. Section 4. Relativistic nuclear physics, elementary particle physics and high-energy physics Speaker Yuriy Uzikov (JINR) Description Spin amplitudes of pp- and pn elastic scattering contain important information on the dynamics of the NN interaction. Systematic information on these amplitudes is accumulated in the SAID data base [1] and available up to kinetic energy 3 GeV for pp and 1.2 GeV for pn scattering. At higher energies there are only non-complete data on pp scattering, whereas information about the pn amplitudes is very poor. In the literature there are some parametrizations for pN amplitudes obtained in the eikonal model [2] and within the Regge phenomenology for 3 - 50 GeV/c [3]. A possible way to check the existing parametrizations is to study spin effects in proton-deuteron (pd) and neutron-deuteron (nd) elastic and quasi-elastic scattering. At high energies and small four-momentum transfer t pd scattering can be described by the Glauber diffraction theory of multistep scattering, which involves as input on-shell pN elastic scattering amplitudes. Application of this theory with spin-dependent effects included [4] demonstrates a good agreement with the pd scattering data at energies about 1 GeV if the SAID data on pN scattering amplitudes are involved into calculations [4,5]. Here we apply the spin-dependent Glauber theory [4] to calculate spin observables of pd elastic scattering at 20 - 50 GeV/c using available pp elastic scattering amplitudes fpp parametrized in Ref. [3] within the Regge formalism. As a first approximation, for pn elastic scattering we use pp amplitudes from [3]. We should note that the Regge formalism allows one to construct pn- (and antiproton N) amplitudes together with the pp amplitudes. However, in view of scare experimental information about the spin dependent pn amplitudes, and taking into account that the spin-independent parts of the pp- and pn amplitude at high energies are approximately the same, we put here fpn=fpp. The calculated vector (Apy, Ady) and tensor (Axx, Ayy, Axz) analysing powers and the spin-correlation coefficients like Cy,y, Cy,yy, Cx,x can be measured at SPD NICA [6] that will provide a serious test of the used pN amplitudes. R.A.Arndt et al., Phys. Rev. C 76 (2007) 025209. S.Wakaizumi, M.Sawamoto, Prog. Theor. Phys. 64 (1980) 1699. A.Sibirtsev et al., Eur. Phys. J. A 45(2010) 357. M.N.Platonova, V.I.Kukulin, Phys.Rev.C 81 (2010) 014004; Eur.Phys.J. A56 (2019) 132. A.A.Temerbayev, Yu.N.Uzikov, Yad. Fiz. 78 (2015) 38. I.Savin et.al., EPJ Web Conf. 85 (2015) 02039.