Measurement of spin-rotation parameters in elastic π
+
p scattering at a momentum of 1.62 GeV/c and calibration of a carbon polarimeter |
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| Authors: | Yu A Beloglazov A I Kovalev S P Kruglov D V Novinsky V V Sumachev V Yu Trautman V A Shchedrov I G Alekseev P E Budkovsky V V Zhurkin V P Kanavets L I Koroleva B V Morozov V M Nesterov V V Ryltsov D N Svirida A D Sulimov N A Bazhanov E I Bunyatova |
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| Institution: | (1) Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina, 188350, Russia;(2) Institute of Theoretical and Experimental Physics, Bol'shaya Cheremushkinskaya ul. 25, Moscow, 117218, Russia;(3) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia |
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| Abstract: | Experimental data on the spin-rotation parameters A and R in elasticπ + p interaction were obtained for the first time at a momentum of p π = 1.62 GeV/c. These data are necessary for unambiguously reconstructing the amplitude of pion-nucleon scattering and, hence, for deducing a correct spectrum of nonstrange baryon resonances. In order to obtain results for the polarization parameters A and R with the minimum possible systematic error, the carbon polarimeter used was preliminarily calibrated in a dedicated experiment; that is, the analyzing power was measured in proton-carbon scattering for incidentproton energies in the range T p =0.7–1.3 GeV. The experimental data reported in the present article were obtained by a collaboration of researchers from the Petersburg Nuclear Physics Institute and Institute of Theoretical and Experimental Physics (ITEP, Moscow) at the ITEP synchrotron. |
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