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Titolo:
Measurement of gamma p -> K+ Lambda and gamma p -> K+Sigma(0) at photon energies up to 2 GeV
Autore:
Tran, MQ; Barth, J; Bennhold, C; Bockhorst, M; Braun, W; Budzanowski, A; Burbach, G; Burgwinkel, R; Ernst, J; Glander, KH; Goers, S; Guse, B; Haas, KM; Hannappel, J; Heinloth, K; Honscheid, K; Jahnen, T; Jopen, N; Jungst, H; Kalinowsky, H; Kirch, U; Klein, FJ; Klein, F; Klempt, E; Kostrewa, D; Kozela, A; Lawall, R; Lindemann, L; Link, J; Manns, J; Mart, T; Menze, D; Merkel, H; Merkel, R; Neuerburg, W; Paganetti, M; Paul, E; Plotzke, R; Schenk, U; Scholmann, J; Schulday, I; Schumacher, M; Schutz, P; Schwille, WJ; Smend, F; Smyrski, J; Speth, W; Tran, HN; van Pee, H; Vogl, V; Wedemeyer, R; Wehnes, F; Wiegers, B; Wieland, FW; Wisskirchen, J; Wolf, A;
Indirizzi:
Univ Bonn, Inst Phys, D-5300 Bonn, Germany Univ Bonn Bonn Germany D-5300Univ Bonn, Inst Phys, D-5300 Bonn, Germany Univ Bonn, Inst Strahlen & Kernphys, D-5300 Bonn, Germany Univ Bonn BonnGermany D-5300 Strahlen & Kernphys, D-5300 Bonn, Germany Jagiellonian Univ, Krakow, Poland Jagiellonian Univ Krakow PolandJagiellonian Univ, Krakow, Poland Univ Gottingen, Inst Phys 2, Gottingen, Germany Univ Gottingen GottingenGermany ingen, Inst Phys 2, Gottingen, Germany George Washington Univ, Dept Phys, Washington, DC 20052 USA George Washington Univ Washington DC USA 20052 , Washington, DC 20052 USA Univ Indonesia, FMIPA, Jurusan Fis, Jakarta, Indonesia Univ Indonesia Jakarta Indonesia FMIPA, Jurusan Fis, Jakarta, Indonesia
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 1-2, volume: 445, anno: 1998,
pagine: 20 - 26
SICI:
0370-2693(199812)445:1-2<20:MOGP-K>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
KAON PHOTOPRODUCTION;
Keywords:
photoproduction; strangeness; hyperons; cross sections; polarizations;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Tran, MQ Univ Bonn, Inst Phys, Nussallee 12, D-5300 Bonn, Germany Univ Bonn Nussallee 12 Bonn Germany D-5300 D-5300 Bonn, Germany
Citazione:
M.Q. Tran et al., "Measurement of gamma p -> K+ Lambda and gamma p -> K+Sigma(0) at photon energies up to 2 GeV", PHYS LETT B, 445(1-2), 1998, pp. 20-26

Abstract

Associated strangeness production in the reactions gamma p --> K+ Lambda and gamma p --> K(+)Sigma(0) was measured with the SAPHIR detector at the electron stretcher ring ELSA at Bonn. Data on total and differential cross sections and on hyperon polarizations are presented. The total cross section for Lambda production shows a strong threshold enhancement whereas the Sigma(0) data have a maximum at about E-gamma = 1.45 GeV. Along with the angular decomposition of the differential cross section into polynomials, this suggests resonance production. However, the angular distributions of both hyperon polarizations vary only slightly with the photon energy, Lambda and Sigma(0) polarizations show opposite signs and change sign over the angular range. (C) 1998 Elsevier Science B.V. All rights reserved.

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Documento generato il 01/12/20 alle ore 10:43:51