Measurements of the P_x'component of neutron polarisation in the reaction γd→pn by linearly polarised photons in the energy range 0.3-0.5 GeV

Deuteron photodisintegration by linearly polarized photons in the energy region 0.3-1.0 GeV

“…Photon energies were reconstructed from one-arm parameters of the investigated two-body process. The error bars include the statistical uncertainties and the systematic ones due to the background contribution ( 4 0 % ) and the uncertainty of the calculated photon polarization (AP.,/P., = 2-3%) [5]. As is seen from the figure, the present data are in good agreement with our previous measurements [6], and as a whole with the Khdrkov data [7], obtained with The curves shown in the figure are the results of the non-relativistic approaches of Leidemann and Arenhovel (LA) [8] and Laget [9], the results of the covariant approach of Barannik and Kulish (BK) 1111 and the BK multipole analysis based on the set of nine DB.…”

Complete angular distribution measurements of two-body deuteron photodisintegration between 0.5 and 3GeV

“…In contrast, polarization observables measured at p c.m. = 90°for photon ener-gies up to 2 GeV [11,12] do not support hadronic helicity conservation predicted by perturbative QCD (pQCD). Thus, it seems that although the observation of the scaling in the cross section at a few proton angles indicates the onset of the quark-gluon degrees of freedom, the appropriate underlying physics has a mixture of perturbative and nonperturbative QCD aspects.…”