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.

引用

页数：11

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