Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-10-25
Physics
Nuclear Physics
Nuclear Theory
7 pages, including 5 figures. Contributed paper to ISHEPP XVI, 10-15 June 2002, Dubna
Scientific paper
Pion production at threshold from nucleon-deuteron collisions is considered, with reference to the outgoing channel where the three-nucleon system is bound. The available experimental data are compared with calculations using accurate nuclear wavefunctions coming from rigorous solutions of the three-nucleon quantum mechanical equations. The dominant contributions for pion production are obtained through matrix elements involving pion-nucleon rescattering mechanisms in S- and P-waves. S-wave rescattering includes also an isoscalar contribution which is enhanced because of the off-shell effects. P-wave rescattering includes also diagrams involving explicitly the Delta degrees of freedom. It is found that the pion-nucleon S-wave off-shell effects in the isospin-even channel are of considerable importance. Initial-state interactions between the proton and the deuteron have in general minor effects on the spin-averaged and spin-dependent observables, except when the polarization observable involves interference terms amongst the various helicity amplitudes. Keywords: Polarization phenomena. Pion production. Few-nucleon systems.
Canton Luciano
Pisent G.
Schadow Wolfgang
Svenne J. P.
No associations
LandOfFree
Production mechanisms and polarization observables for p + d -> He(3) + pi(o) near threshold does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Production mechanisms and polarization observables for p + d -> He(3) + pi(o) near threshold, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production mechanisms and polarization observables for p + d -> He(3) + pi(o) near threshold will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-614613