Measurement of spin rotation parameter A+ in π +p elastic scattering

Authors :: Itep-Pnpi Collaboration
I. G. Alekseev
B. M. Bobchenko
P. E. Budkovsky
V. P. Kanavets
L. I. Koroleva
V. I. Martynov
B. V. Morozov
V. M. Nesterov
V. V. Platonov
V. V. Ryltsov
V. A. Sakharov
A. D. Sulimov
D. N. Svirida
V. V. Zhurkin
V. V. Abaev
N. A. Bazhanov
V. S. Bekrenev
Yu. A. Beloglazov
E. A. Filimonov
A. I. Kovalev
N. G. Kozlenko
S. P. Kruglov
A. A. Kulbardis
I. V. Lopatin
V. A. Schedrov
V. V. Sumachev
V. Yu. Trautman
Source :: Surveys in High Energy Physics. 9:307-314
Publication Year :: 1996
Publisher :: Informa UK Limited, 1996.
Abstract: The ITEP-PNPI collaboration presents first results of the spin rotation parameter A+ measurements in the second resonance region. The experiment was performed on ITEP accelerator at positive pion beam momentum 1·43 GeV/c (√s= 1·90 GeV/c) for scattering angles 0cm = 127° and 133°. Main parts of the setup were a polarized proton target and a carbon-plate polarimeter. The results of measurements are in agreement with the predictions of the partial-wave analysis VPI and in contradiction with the predictions of PWA's KH and CMB.