نتایج جستجو برای: deuteron
تعداد نتایج: 2862 فیلتر نتایج به سال:
Deuteron elastic and deep inelastic electromagnetic properties have been studied within the front-form Hamiltonian dynamics, using a Poincaré-covariant current operator. The deuteron elastic form factors are strongly sensitive to different realistic N−N interactions, while the relevance of different nucleon form factor models is huge for A(Q), weak for B(Q) and negligible for the tensor polariz...
The spin-averaged structure function of the neutron, F n 2 , is extracted from recent deuteron data, taking into account the small but significant corrections from nuclear effects in the deuteron. At small x, the F D 2 /F p 2 ratio measured by the New Muon and Fermilab E665 Collaborations is interpreted to suggest a small amount of shadowing in deuterium, which acts to enhance F n 2 for x < ∼ 0...
The multichannel scattering theory is applied to the (2,2) sector of the (non-static) Lee model. Rigorous expressions for the transit ion amplitudes for two-fragments channels are derived. These expressions contain al l effects of off-shell renormalizat ion in a complete and consistent way. W i t h suitable identification of the elementary fields of the model the reactions considered correspond...
Present day chiral nucleon-nucleon potentials up to next-to-next-tonext-to leading order and three nucleon forces at next-to-next-to leading order are used to analyze nucleon-deuteron radiative capture at deuteron laboratory energies below Ed ≈ 100 MeV. The differential cross section and the deuteron analyzing powers Ay(d) and Ayy are presented and compared to data. The theoretical predictions ...
Methanol dimer (CD3OH)2 ion–molecule reaction is initialized by VUV ~vacuum ultraviolet! laser photoionization. The proton and deuteron transfers are the dominant reactions. The relative probabilities of deuteron transfer from the methyl group and proton from the hydroxyl group were measured as a function of VUV photon energy between 10.91 to 10.49 eV. According to those results, the probabilit...
We use non-relativistic dynamics to relate the deuteron form factor at high momentum transfer to the high energy neutron-proton scattering amplitude. This relation implies that an accurate computation of the form factors at large Q2 requires a simultaneous description of the lowest phase-shifts of the nucleon-nucleon elastic scattering at laboratory kinetic energy T ∼ Q/2mN . Computing these ph...
Neutron-deuteron elastic scattering cross sections are calculated at different energies using modern nucleon-nucleon (NN) interactions and the Tucson-Melbourne three-nucleon force adjusted to the triton binding energy. Predictions based on NN forces only underestimate nucleon-deuteron data in the minima at higher energies starting around 60 MeV. Adding the three-nucleon forces fills up those mi...
We discuss possible studies of parton distributions at the proposed 50-GeV PS facility. First, comments are given in general on the importance of large-x physics for finding new physics. Second, polarized deuteron reactions are discussed in connection with new structure functions which are specific for a spin-1 hadron. Third, if the polarized proton-deuteron Drell-Yan process is studied at the ...
In this paper, we reformulate three-nucleon breakup scattering in leading order approximation by considering spin-isospin degrees of freedom. At first, considering the inhomogeneous part of Faddeev equation, which is a valid approximation in high and intermediate energles, we present the Faddeev equation as a function of vector Jacobi momenta and spin and isospin quantum numbers. In this new fo...
Abstract We present measurements of differential cross sections and analyzing powers for the elastic $$^{2}\mathrm{H}(\mathbf {d},d){d}$$ 2 H ( d , ) scattering proce...
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