Improved study of a possible Θ+ production in the pp→pK0Σ+ reaction with the COSY-TOF spectrometer

被引：30
作者：
Abdel-Bary, M.
Abdel-Samad, S.
Brinkmann, K.-Th.
Castelijns, R.
Clement, H.
Dietrich, J.
Dshemuchadse, S.
Dorochkevitch, E.
Eyrich, W. [5 ]
Ehrhardt, K.
Erhardt, A.
Freiesleben, H.
Gast, W.
Georgi, J.
Gillitzer, A.
Jaeger, H.
Jaekel, R.
Karsch, L.
Kilian, K.
Krapp, M.
Kuhlmann, E.
Lehmann, A.
Morsch, H. P.
Paul, N.
Pinna, L.
Pizzolotto, C.
Ritman, J.
Roderburg, E.
Schadmand, S.
Schonmeier, P.
Schulte-Wissermann, M.
Schroeder, W.
Sefzick, T.
Teufel, A.
Ucar, A.
Ullrich, W.
Wenzel, R.
Wintz, P.
Wuestner, P.
Zupranski, P.
机构：
[1] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany
[2] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany
[3] Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany
[4] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland
[5] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany
来源：
PHYSICS LETTERS B | 2007年 / 649卷 / 04期
关键词：
D O I：
10.1016/j.physletb.2007.04.023
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The pp -> pK(0)Sigma(+) reaction was investigated with the TOF spectrometer at COSY at 3.059 GeV/c incident beam momentum. The main objective was to clarify whether or not a narrow exotic S = +1 resonance, the Theta+ pentaquark, is populated at 1.53 GeV/c(2) in the pK0 subsystem with a data sample of much higher statistical significance compared to the previously reported data in this channel. An analysis of these data does not confirm the existence of the Theta(+) pentaquark. This is expressed as an upper limit for the cross section sigma (pp -> Z+ Theta+) < 0.15 mu b at the 95% confidence level. (C) 2007 Elsevier B.V. All rights reserved.
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收藏
页码：252 / 257
页数：6
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