A formalism is developed for calculating the signal of the violation of time-reversal invariance,provided that space-reflection(parity)invariance is conserved during the scattering of tensor-polarized deuterons on vec...A formalism is developed for calculating the signal of the violation of time-reversal invariance,provided that space-reflection(parity)invariance is conserved during the scattering of tensor-polarized deuterons on vector-polarized deuterons.The formalism is based on Glauber theory and fully considers the spin dependence of NN elastic scattering amplitudes and the spin structure of colliding deuterons.Numerical calculations are performed in the laboratory proton energy range T_(p)=0.1–1.2 GeV using the SAID database for spin amplitudes and in the energy region of the SPD NICA experiment corresponding to the invariant mass of the interacting nucleon pairs√S_(NN)=2.5-25GeV–25 GeV,using two phenomenological models of PN elastic scattering.It is found that only one type of the time-reversal non-invariant parity conserving interaction gives a non-zero contribution to the signal in question,which is important for isolating an unknown constant of this interaction from the corresponding data.展开更多
The dibaryon concept for nuclear force is presented,assuming that the attraction between nucleons at medium distances is mainly due to the s-channel exchange of an intermediate six-quark(dibaryon)state.To construct th...The dibaryon concept for nuclear force is presented,assuming that the attraction between nucleons at medium distances is mainly due to the s-channel exchange of an intermediate six-quark(dibaryon)state.To construct the respective NN interaction model,a microscopic six-quark description of the NN system is used,in which symmetry aspects play a special role.It is shown that the NN interaction in all important partial waves can be described by the superposition of long-range t-channel one-pion exchange and s-channel exchange by an intermediate dibaryon.The model developed in this study provides a good description of both elastic phase shifts and inelasticities of NN scattering in all S,P,D,and F partial waves at energies from zero to 600-800 MeV and even higher.The parameters of the intermediate six-quark states,corresponding to the best fit of NN scattering data,are found to be consistent with the parameters of the known dibaryon resonances in those NN partial configurations,where their existence has been experimentally confirmed.Predictions for new dibaryon states are given as well.展开更多
基金the expense of the grant from the Russian Science Foundation(23-22-00123,https://rscf.ru/en/project/23-22-00123/)。
文摘A formalism is developed for calculating the signal of the violation of time-reversal invariance,provided that space-reflection(parity)invariance is conserved during the scattering of tensor-polarized deuterons on vector-polarized deuterons.The formalism is based on Glauber theory and fully considers the spin dependence of NN elastic scattering amplitudes and the spin structure of colliding deuterons.Numerical calculations are performed in the laboratory proton energy range T_(p)=0.1–1.2 GeV using the SAID database for spin amplitudes and in the energy region of the SPD NICA experiment corresponding to the invariant mass of the interacting nucleon pairs√S_(NN)=2.5-25GeV–25 GeV,using two phenomenological models of PN elastic scattering.It is found that only one type of the time-reversal non-invariant parity conserving interaction gives a non-zero contribution to the signal in question,which is important for isolating an unknown constant of this interaction from the corresponding data.
基金partially supported by RFBR,grants Nos.19-02-00011 and 19-02-00014support from the Foundation for the Advancement of Theoretical Physics and Mathematics“BASIS”。
文摘The dibaryon concept for nuclear force is presented,assuming that the attraction between nucleons at medium distances is mainly due to the s-channel exchange of an intermediate six-quark(dibaryon)state.To construct the respective NN interaction model,a microscopic six-quark description of the NN system is used,in which symmetry aspects play a special role.It is shown that the NN interaction in all important partial waves can be described by the superposition of long-range t-channel one-pion exchange and s-channel exchange by an intermediate dibaryon.The model developed in this study provides a good description of both elastic phase shifts and inelasticities of NN scattering in all S,P,D,and F partial waves at energies from zero to 600-800 MeV and even higher.The parameters of the intermediate six-quark states,corresponding to the best fit of NN scattering data,are found to be consistent with the parameters of the known dibaryon resonances in those NN partial configurations,where their existence has been experimentally confirmed.Predictions for new dibaryon states are given as well.
