Proton and triton momentum distributions from4He fragmentation at relativistic energies

Measurement of tensor polarization of deuterons from3He→d+pbreakup at momenta from 4.60 to 5.66 GeV/c

“…Inclusive measurements of 12 C( 3 He, d)X and 12 C( 3 He, p)X at a 3 He momentum of 10.7 GeV/c were performed for the first time in Dubna with the ALPHA-spectrometer [3] in a wide region of internal momenta of the fragments. The ultimate goal of all these experiments was to get experimental information about the momentum distribution of nucleons in the 3 He nucleus and compare it with theoretical predictions. Results of these experiments have been consistent in the region of internal momenta of nucleons in 3 He where the explored momentum regions overlapped, while at higher momenta an unexpected behavior of the fragment spectra was observed [3].…”

“…Results of these experiments have been consistent in the region of internal momenta of nucleons in 3 He where the explored momentum regions overlapped, while at higher momenta an unexpected behavior of the fragment spectra was observed [3]. That was the first step of a program aimed at the study of the 3 He structure at moderate and short distances between constituents. The next step in experimental studies of the 3 He structure must include relevant spin-dependent observables, as it became clear from 1 investigations of the structure of the deuteron [4,5,6].…”

“…The study of the 3 He breakup reactions into various channels with nuclear probes in the intermediate energy region has been started in 1972 at SREL [1] and continued at TRIUMF [2]. Inclusive measurements of 12 C( 3 He, d)X and 12 C( 3 He, p)X at a 3 He momentum of 10.7 GeV/c were performed for the first time in Dubna with the ALPHA-spectrometer [3] in a wide region of internal momenta of the fragments. The ultimate goal of all these experiments was to get experimental information about the momentum distribution of nucleons in the 3 He nucleus and compare it with theoretical predictions.…”

“…The ultimate goal of all these experiments was to get experimental information about the momentum distribution of nucleons in the 3 He nucleus and compare it with theoretical predictions. Results of these experiments have been consistent in the region of internal momenta of nucleons in 3 He where the explored momentum regions overlapped, while at higher momenta an unexpected behavior of the fragment spectra was observed [3]. That was the first step of a program aimed at the study of the 3 He structure at moderate and short distances between constituents.…”

“…That was the first step of a program aimed at the study of the 3 He structure at moderate and short distances between constituents. The next step in experimental studies of the 3 He structure must include relevant spin-dependent observables, as it became clear from 1 investigations of the structure of the deuteron [4,5,6]. It was demonstrated in those experimental studies that spin-dependent observables bring very important and new information.…”