pi. /sup -/p. --> omega. n reaction at momenta from 15 to 40 GeV/c

Journal Article · Tue Jan 01 00:00:00 EST 1980 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:6781435

Apel, W D; Augenstein, K H; Bertolucci, E; Vincelli, M L; Donskov, S V; Inyakin, A; Kachanov, V A; Quaglia, M; Krasnokutsky, R N; Krueger, M; Leder, G; Lednev, A A; Mannelli, I; Mikhailov, Y V; Mueller, H; Prokoshkin, Y D; Pierazzini, G M; Sergiampietri, F; Sigurdsson, G; Scribano, A ; Schneider, H; Shuvalov, R S

Cross sections for the reaction ..pi../sup -/p..--> omega..n, ..omega --> pi../sup 0/..gamma.. have been measured with good statistics at incident-pion momenta of 15, 20, 25, 30, and 40 GeV/c. The experiments were performed at the 70-GeV IHEP accelerator, using the NICE 648-channel hodoscopic spectrometer. The density matrix elements and the differential and integrated cross sections for the reaction have been determined. The unnatural-parity exchange contribution to the production of ..omega.. mesons in the state with helicity 1 is already insignificant at 15 GeV/c. With increasing Vertical BartVertical Bar the differential cross sections pass through a maximum at Vertical BartVertical Barapprox. =0.12 (GeV/c)/sup 2/ and then fall exponentially until Vertical BartVertical Barapprox. =0.7 (GeV/c)/sup 2/; at that point the curve bends sharply, the cross section falling off much less rapidly for larger values of Vertical BartVertical Bar.

• Research Organization: Joint experiment of the Institute of High Energy Physics, Serpukhov, USSR and the European Organization for Nuclear Research, Geneva, Switzerland
• OSTI ID: 6781435
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Vol. 31:1
• Country of Publication: United States
• Language: English

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