Deuteron disintegration by protons in kinematics of the quasi-elastic backward pd-scattering
نویسندگان
چکیده
The deuteron break-up exclusive reaction p+ d → N(180) + (NN)(0) is considered in the framework of the one-nucleon-exchange mechanism at the incident proton kinetic energy 0.2–2 GeV and the relative energy of nucleons in the forward going final NN -pair ENN = 0–20 MeV, that is close to the kinematical conditions of the planned experiment at COSY. The off-energy-shell effects resulting, in particular, in the node of the half-off-shell S0-state partial NN -scattering amplitude and the role of higher partial waves in the subprocess pN → pN are analysed and found to be very important, especially for the reaction p+ d → n(180)+ (pp)(0). The accuracy of some approximate relations between the cross sections of elastic pd-scattering and deuteron break-up is examined in the framework of the mechanism in question. P. N. Lebedev Physical Institute RAS
منابع مشابه
Deuteron Breakup pd → pnp in Specific Kinematics and Short - Range NN - Interaction
Deuteron breakup processes p + d → (NN) s,t + N are studied in the kinematics of backward elastic pd-scattering at law relative momenta of the NN-pair k ∼ 0 − 50MeV /c for initial energies T 0 = 0.5 − 2.5GeV in the framework of the known mechanisms of the pd → dp process including rescatterings in the initial and final states. A considerable suppression of the ∆− and N * − isobar excitation mec...
متن کاملar X iv : n uc l - th / 0 11 10 81 v 1 2 8 N ov 2 00 1 A Possibility to Observe Short - Range NN Properties in the Deuteron Breakup pd → ppn
Quasi-binary reaction of the deuteron breakup p+d → (pp)+n with the final proton-proton pair (pp) in the 1 S 0 state is analyzed at initial energies 0.5 − 2 GeV in the kinematics of backward elastic pd-scattering pd → dp. On the basis of the main mechanisms of the pd → dp process, including initial and final state interaction, we show that unpolarized cross section and spin observables of this ...
متن کاملStructure and Mechanisms of pHe Backward Elastic Scattering
The mechanism of pHe backward elastic scattering is studied. It is found that the triangle diagrams with the subprocesses pd →3Heπ0, pd →3Heπ0 and p(pp) →3Heπ+, where d and pp denote the singlet deuteron and diproton pair in the S0 state, respectively, dominate in the cross section at 0.3-0.8 GeV, and their contribution is comparable with that for a sequential transfer of a np pair at 1-1.5 GeV...
متن کاملRole of Deuteron Nn∗-components in Processes
The contribution of nucleon isobar N exchanges to backward elastic pd-scattering is calculated on the basis of deuteron 6q-model and found to be negligible in comparison with the neutron exchange. It is shown that the pole amplitude of neutron pickup from the deuteron nN-component is favoured in the reaction pd → dN for backward going N(1440) and N(1710) at kinetic energy of incident proton of ...
متن کاملRole of Intermediate Pions in pHe Backward Elastic Scattering
The mechanism of pHe backward elastic scattering is studied. It is found that the triangle diagrams with the subprocesses pd →Heπ and pd →Heπ, where d denotes a pn pair in the spin-singlet (S0) state, dominate in the cross section at 0.3-0.8 GeV, and their contribution is comparable with that for a sequential transfer of a np pair at 1-1.5 GeV. The contribution of the d, estimated on the basis ...
متن کامل