Measurement of the branching ratio for the [Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma] radiative decay

We have measured the branching ratio for the hyperon radiative decay [Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma] from a sample of 211[plus minus]33 events obtained in the polarized 375 GeV/[ital c] charged hyperon beam at Fermilab. We find [ital B]([Xi][sup [minus]][r arrow][Sigma][sup [mi...

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Veröffentlicht in:	Physical review letters 1994-02, Vol.72:6
Hauptverfasser:	Dubbs, T., Albuquerque, I.F., Bondar, N.F., Carrigan, R. Jr, Chen, D., Cooper, P.S., Lisheng, D., Denisov, A.S., Dobrovolsky, A.V., Endler, A.M.F., Escobar, C.O., Foucher, M., Golovtsov, V.L., Gottschalk, H., Gouffon, P., Grachev, V.T., Khanzadeev, A.V., Kubantsev, M.A., Kuropatkin, N.P., Lach, J., Pengfei, L., Chengze, L., Yunshan, L., Luksys, M., Mahon, J.R.P., McCliment, E., Morelos, A., Newsom, C., Pommot Maia, M.C., Samsonov, V.M., Schegelsky, V.A., Huanzhang, S., Smith, V.J., Fukun, T., Terentyev, N.K., Timm, S., Tkatch, I.I., Uvarov, L.N., Vorobyov, A.A., Jie, Y., Wenheng, Z., Shuchen, Z., Yuanyuan, Z.
Format:	Artikel
Sprache:	eng
Schlagworte:	662390 - Electromagnetic Processes & Properties- (1992-) 662410 - Properties of Baryons & Baryon Resonances- (1992-) ASYMMETRY BARYONS BRANCHING RATIO CALCULATION METHODS DECAY ELEMENTARY PARTICLES FERMIONS HADRONS HYPERONS MONTE CARLO METHOD PARTICLE DECAY PHYSICS OF ELEMENTARY PARTICLES AND FIELDS RADIATIVE DECAY SIGMA BARYONS SIGMA MINUS PARTICLES SIGMA PARTICLES STRANGE PARTICLES XI BARYONS XI MINUS PARTICLES XI PARTICLES
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Zusammenfassung:	We have measured the branching ratio for the hyperon radiative decay [Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma] from a sample of 211[plus minus]33 events obtained in the polarized 375 GeV/[ital c] charged hyperon beam at Fermilab. We find [ital B]([Xi][sup [minus]][r arrow][Sigma][sup [minus]][gamma]/[Xi][sup [minus]][r arrow][Lambda][sup 0][pi][sup [minus]])=(1.22[plus minus]0.23[plus minus]0.06)[times]10[sup [minus]4] where the quoted errors are statistical and systematic, respectively. We have also obtained an indication that the sign of the asymmetry parameter of this decay is positive.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.72.808