Forward-angle elastic and quasielastic proton-nucleon cross sections and analyzing powers at 0.8 GeV

Measurement of the analyzing powers in pd elastic and pn quasi-elastic scattering at small angles at ANKE-COSY

“…Using the conservative limits mentioned above, values of the analyzing power were obtained that were in good agreement with the SAID SP07 [2] solution as well as with the data measured in Ref. [20] down to Θ cm = 17 • , as shown in the Fig. 3.…”

npelastic spin transfer measurements at 788 MeV

“…(Note that the quoted uncertainties for A& in Ref. [6] are statistical only. ) Experience with the isospin-1 (pp) system has shown that the phase-shift analysis becomes reliable only when there are sufficient data to overdetermine the five scattering amplitudes independently of theoretical input.…”

“…In addition, the spindependent total cross sections b, ol and b.oT [14 -17] have recently been measured. Finally, the analyzing power [6] Atv and spin-depolarization parameters D;1 have been measured for the quasifree reaction from the neutron in deuterium [18]. (Note that the quoted uncertainties for A& in Ref.…”

Measurement of the analyzing powers in $\vec{p}d$p→delastic and $\vec{p}n$p→n quasi-elastic scattering at small angles

“…In earlier experiments [15,21,22], quasi-free A p y (pn) was studied by measuring both scattered particles in conditions close to free kinematics and then reconstructing the momentum of the unobserved "spectator" proton. In contrast, at ANKE the fast scattered proton was detected in coincidence with the directly measured "spectator" proton.…”

“…5, is much more challenging. There are several measurements of the analyzing power in neutron-proton elastic scattering in the 800 MeV region by different groups [15][16][17][18][19][20] some using beams of free neutrons while others studied quasifree scattering. A useful summary of the available data is to be found on the SAID WEB site [9].…”