Measurement of the asymmetry parameter in the hyperon radiative decay. Sigma. sup + r arrow p. gamma

Journal Article · Mon May 18 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.3004· OSTI ID:7173713

Foucher, M; Albuquerque, I F; Bondar, N F; Carrigan, R Jr; Chen, D; Chengze, Li; Cooper, P S; Denisov, A S; Dobrovolsky, A V; Dubbs, T; Endler, A M.F.; Escobar, C O; Fukun, Tang; Golovtsov, V L; Goritchev, P A; Gottschalk, H; Gouffon, P; Grachev, V T; Huanzhang, Shi; Jie, Yan ; Khanzadeev, A V; Kubantsev, M A; Kuropatkin, N P; Lach, J; Luksys, M; Lebedenko, V N; Lisheng, Dai; Mahon, J R.P.; McCliment, E; Morelos, A; Newsom, C; Pengfei, Lang; Pommot Maia, M C; Samsonov, V M; Shuchen, Zheng; Smith, V J; Terentyev, N K; Timm, S; Tkatch, I I; Uvarov, L N; Vorobyov, A A; Wenheng, Zhao; Yuanyuan, Zhong; Yunshan, Li ^[1]

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1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States) Institute of High Energy Physics, Beijing (China) St. Petersburg Nuclear Physics Institute, Gatchina (Russia) Institute of Theoretical and Experimental Physics, Moscow (Russia) University of Iowa, Iowa City, Iowa 52242 (United States) Universidade de Sao Paulo, Sao Paulo (Brazil)

We have measured the asymmetry parameter ({alpha}{sub {gamma}}) in the hyperon radiative decay {Sigma}{sup +}{r arrow}{ital p}{gamma} with a sample of 34 754{plus minus}212 events obtained in a polarized charged hyperon beam experiment at Fermilab. We find {alpha}{sub {gamma}}={minus}0.720{plus minus}0.086{plus minus}0.045, where the quoted errors are statistical and systematic, respectively.

• DOE Contract Number: AC02-80ER10587; AC02-76CH03000; AC02-76ER03075
• OSTI ID: 7173713
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:20; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

662360* -- Decays of Baryons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ASYMMETRY
BARYONS
DATA
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ERRORS
EXPERIMENTAL DATA
FERMIONS
HADRONS
HYPERONS
INFORMATION
NUMERICAL DATA
PARAMETRIC ANALYSIS
PARTICLE DECAY
POLARIZATION
RADIATIVE DECAY
SIGMA BARYONS
SIGMA-1385 BARYONS
STRANGE PARTICLES