Study of. pi. /sup +/p and. pi. /sup -/p elastic-scattering differential cross sections at energies from 425 to 640 MeV

Journal Article · Thu Mar 01 04:00:00 EST 1979 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:5867163

Gordeev, V A; Koptev, V P; Kruglov, S P; Kuz'min, L A; Kulbardis, A A; Malov, Y A; Mikirtych'yants, S M; Strakovskii, I I; Shcherbakov, G V

Differential cross sections have been measured for ..pi../sup +/p elastic scattering at incident-pion energies 442, 490, 530, 560, and 600 MeV, and for ..pi../sup -/p elastic scattering at pion energies 425, 465, 490, 530, 560, 600, and 640 MeV. The differential cross sections were measured in the angular range theta/sub ..pi../*=40--176/sup 0/ with an accuracy of about 2--5%. The resulting data were used to calculate the isospin boundaries for the ..pi../sup -/p..--> pi../sup 0/n charge-exchange cross sections. It is shown that the published charge-exchange cross sections for large scattering angles cluster near the lower boundary and that those for energies above 490 MeV fall outside the region allowed by isotopic invariance. The measured cross sections are compared with the predictions of various phase-shift analyses, and it is shown that none of the existing analyses can describe all the new data in a satisfactory manner. The results of the present experiment together with available accurate data on ..pi.. +- p elastic scattering at lower energies constitute a systematic self-consistent set of accurate data that can serve as a basis for a new phase-shift analysis of ..pi..p scattering in the region of the P/sub 33/, P/sub 11/, S/sub 11/, and D/sub 13/ resonances.

• Research Organization: Leningrad Institute of Nuclear Physics, Academy of Sciences of the USSR
• OSTI ID: 5867163
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 29:3; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
HADRON-HADRON INTERACTIONS
INTERACTIONS
ISOSPIN
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PION MINUS-PROTON INTERACTIONS
PION PLUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
SCATTERING