Associate K0 production in p plus p collisions at 3.5 GeV: The role of Δ(1232)++

被引:15
|
作者
Agakishiev, G. [1 ]
Arnold, O. [2 ,3 ]
Belver, D. [4 ]
Belyaev, A. [1 ]
Berger-Chen, J. C. [2 ,3 ]
Blanco, A. [5 ]
Boehmer, M. [3 ]
Boyard, J. L. [6 ]
Cabanelas, P. [4 ]
Chernenko, S. [1 ]
Dybczak, A. [7 ]
Epple, E. [2 ,3 ]
Fabbietti, L. [2 ,3 ]
Fateev, O. [1 ]
Finocchiaro, P. [8 ]
Fonte, P. [9 ]
Friese, J. [3 ]
Froehlich, I. [10 ]
Galatyuk, T. [11 ,12 ]
Garzon, J. A. [4 ]
Gernhaeuser, R. [3 ]
Goebel, K. [10 ]
Golubeva, M. [13 ]
Gonzalez-Diaz, D. [11 ]
Guber, F. [13 ]
Gumberidze, M. [11 ,12 ]
Heinz, T. [14 ]
Hennino, T. [6 ]
Holzmann, R. [14 ]
Ierusalimov, A. [1 ]
Iori, I. [15 ,16 ]
Ivashkin, A. [13 ]
Jurkovic, M. [3 ]
Kaempfer, B. [17 ,18 ]
Karavicheva, T. [13 ]
Koenig, I. [14 ]
Koenig, W. [14 ]
Kolb, B. W. [14 ]
Korcyl, G.
Kornakov, G. [11 ]
Kotte, R. [17 ]
Krasa, A. [19 ]
Krizek, F. [19 ]
Kruecken, R. [3 ]
Kuc, H. [6 ,7 ]
Kuehn, W. [20 ]
Kugler, A.
Kunz, T.
Kurepin, A.
Ladygin, V. [1 ]
机构
[1] Joint Inst Nucl Res, Dubna 141980, Russia
[2] Excellence Cluster Origin & Struct Universe, D-85748 Garching, Germany
[3] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany
[4] Univ Santiago de Compostela, LabCAF F Fis, Santiago De Compostela 15706, Spain
[5] LIP Lab Instrumentacao & Fis Expt Particulas, P-3004516 Coimbra, Portugal
[6] Univ Paris 11, CNRS, IN2P3, Inst Phys Nucl UMR 8608, F-91406 Orsay, France
[7] Jagiellonian Univ, Smoluchowski Inst Phys, PL-30059 Krakow, Poland
[8] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95125 Catania, Italy
[9] ISEC Coimbra, Coimbra, Portugal
[10] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany
[11] Tech Univ Darmstadt, D-64289 Darmstadt, Germany
[12] ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany
[13] Russian Acad Sci, Nucl Res Inst, Moscow 117312, Russia
[14] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany
[15] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
[16] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[17] Helmholtz Zentrum Dresden Rossendorf, Inst Strahlenphys, D-01314 Dresden, Germany
[18] Tech Univ Dresden, D-01062 Dresden, Germany
[19] Acad Sci Czech Republ, Inst Nucl Phys, CZ-25068 Rez, Czech Republic
[20] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany
[21] Inst Theoret & Expt Phys, Moscow 117218, Russia
[22] Univ Cyprus, Dept Phys, CY-1678 Nicosia, Cyprus
[23] Frederick Univ, CY-1036 Nicosia, Cyprus
[24] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
来源
PHYSICAL REVIEW C | 2014年 / 90卷 / 01期
关键词
STRANGE-PARTICLE PRODUCTION; KAON PRODUCTION; LAMBDA; SEARCH;
D O I
10.1103/PhysRevC.90.015202
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
An exclusive analysis of the four-body final states Lambda + p + pi(+) + K-0 and Sigma(0) + p + pi(+) + K-0 measured with HADES for p + p collisions at a beam kinetic energy of 3.5 GeV is presented. The analysis uses various phase space variables, such as missing mass and invariant mass distributions, in the four-particle event selection (p,pi(+),pi(+),pi(-)) to find cross sections of the different production channels, contributions of the intermediate resonances Delta(++) and Sigma(1385)(+), and corresponding angular distributions. A dominant resonant production is seen, where the reaction Lambda + Delta(++) + K-0 has a cross section about ten times higher (29.45 +/- 0.08(-1.46)(+1.67) +/- 2.06 mu b) than the analogous nonresonant reaction (2.57 +/- 0.02(-1.98)(+0.21) +/- 0.18 mu b). A similar result is obtained in the corresponding Sigma(0) channels with 9.26 +/- 0.05(-0.31)(+1.41) +/- 0.65 mu b in the resonant and 1.35 +/- 0.02(-1.35)(+0.10) +/- 0.09 mu b in the nonresonant reactions.
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页数:11
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