The pp → nK+Σ+ reaction at 2.95 GeV/c

被引：4

作者：

Abdel-Bary, M. ^{[1
]}

Abdel-Samad, S. ^{[1
]}

Bilger, R. ^{[3
]}

Brinkmann, K-Th. ^{[7
]}

Clement, H. ^{[4
]}

Doroshkevich, E. ^{[4
]}

Dshemuchadse, S. ^{[2
]}

Erhardt, A. ^{[4
]}

Eyrich, W. ^{[3
]}

Filges, D. ^{[1
]}

Filippi, A. ^{[6
]}

Freiesleben, H. ^{[2
]}

Fritsch, M. ^{[3
]}

Georgi, J. ^{[3
]}

Gillitzer, A. ^{[1
]}

Hesselbarth, D. ^{[1
]}

Jakob, B. ^{[2
]}

Karsch, L. ^{[2
]}

Kilian, K. ^{[1
]}

Koch, H. ^{[8
]}

Kress, J. ^{[4
]}

Kuhlmann, E. ^{[2
]}

Marcello, S. ^{[6
]}

Marwinski, S. ^{[1
]}

Mauro, S. ^{[8
]}

Michel, P. ^{[5
]}

Moeller, K. ^{[5
]}

Morsch, H. P. ^{[1
]}

Naumann, L. ^{[5
]}

Paul, N. ^{[1
]}

Plettner, Ch. ^{[2
]}

Richter, M. ^{[2
]}

Ritman, J. ^{[1
]}

Roderburg, E. ^{[1
]}

Schamlott, A. ^{[5
]}

Schoenmeier, P. ^{[2
]}

Schroeder, W. ^{[3
]}

Schulte-Wissermann, M. ^{[2
]}

Sefzick, T. ^{[1
]}

Stinzig, F. ^{[3
]}

Steinke, M. ^{[8
]}

Sun, G. Y. ^{[2
]}

Teufel, A. ^{[3
]}

Wagner, G. J. ^{[4
]}

Wagner, M. ^{[3
]}

Wilms, A. ^{[8
]}

Wintz, P. ^{[1
]}

Wirth, S. ^{[3
]}

机构：

[1] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[2] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

[3] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[4] Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany

[5] Forschungszentrum Dresden Rossendorf, Inst Kern & Hadronenphys, D-01314 Dresden, Germany

[6] Ist Nazl Fis Nucl, I-10125 Turin, Italy

[7] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[8] Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany

来源：

EUROPEAN PHYSICAL JOURNAL A | 2012年 / 48卷 / 03期

关键词：

PROTON-PROTON COLLISIONS; REACTION NEAR-THRESHOLD; HYPERON PRODUCTION; STRANGENESS PRODUCTION; KAON PRODUCTION; CROSS-SECTIONS; RESONANCES; DETECTOR; SPECTRA; MESONS;

D O I：

10.1140/epja/i2012-12037-2

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The total cross-section of the pp -> nK(+)S(+) reaction was measured at COSY using a proton beam with a momentum of p(beam) = 2.95 GeV/c, corresponding to an excess energy of epsilon = 129 MeV. The neutron detector COSYnus was added to the time-of-flight spectrometer COSY-TOF which tracks charged primary and secondary particles. Thus a complete reconstruction of the exit channel was feasible by exploiting for both neutron and kaon their time and direction of flight as well as the decay of the Sigma(+)-hyperon into a neutral and a charged particle. The cross-section was determined to be between sigma = 2.0 and 5.9 mu b with 68% confidence. The experimental data published so far by various groups for this reaction are assessed as a whole. We conclude that either the theoretical models lack some important aspect of the reaction mechanism if one takes the experimental data at face value, or the experimental data are inconsistent and therefore theoretical descriptions must fail.

引用

页码：1 / 8

页数：8

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