Measurement of {pi}{sup -}p{yields}{eta}n from threshold to p{sub {pi}}{sub {sup -}}=747 MeV/c

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.015203· OSTI ID:20698855

Prakhov, S; Nefkens, B M.K.; Clajus, M; Marusic, A; McDonald, S; Phaisangittisakul, N; Price, J W; Starostin, A; Tippens, W B ^[1]; Allgower, C E; Spinka, H ^[2]; Arndt, R A; Briscoe, W J; Shafi, A; Strakovsky, I I; Workman, R L ^[3]; Bekrenev, V; Koulbardis, A; Kozlenko, N; Kruglov, S ^[4]

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1. University of California Los Angeles, Los Angeles, California 90095-1547 (United States)
2. Argonne National Laboratory, Argonne, Illinois 60439-4815 (United States)
3. George Washington University, Washington, D.C. 20052-0001 (United States)
4. Petersburg Nuclear Physics Institute, Gatchina, RU-188350 (Russian Federation); and others

The differential cross section for {eta} production in reaction {pi}{sup -}p{yields}{eta}n has been measured over the full angular range at seven incident {pi}{sup -} beam momenta from threshold to p{sub {pi}}{sub {sup -}}=747 MeV/c using the Crystal Ball multiphoton spectrometer. The angular distributions are S wave dominated. At 10 MeV/c above threshold, a small D-wave contribution appears that interferes with the main S wave. The total {eta} production cross section {sigma}{sup tot} is obtained by integration of d{sigma}/d{omega}. Starting at threshold, {sigma}{sup tot} rises rapidly, as expected for S-wave-dominated production. The features of the {pi}{sup -}p{yields}{eta}n cross section are strikingly similar to those of the SU(3) flavor-related process K{sup -}p{yields}{eta}{lambda}. Comparison of the {pi}{sup -}p{yields}{eta}n reaction is made with {eta} photoproduction.

• OSTI ID: 20698855
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 72, Issue 1; Other Information: DOI: 10.1103/PhysRevC.72.015203; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). Crystal Ball Collaboration; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
COMPARATIVE EVALUATIONS
D WAVES
DIFFERENTIAL CROSS SECTIONS
ETA MESONS
KAON-PROTON INTERACTIONS
LAMBDA BARYONS
MEV RANGE
MULTI-PHOTON PROCESSES
NEUTRONS
PHOTOPRODUCTION
PION MINUS REACTIONS
PION-PROTON INTERACTIONS
PIONS MINUS
S WAVES