Baryonic resonances close to the (K)over-barN threshold: The case of Λ (1405) in pp collisions

被引：82

作者：

Agakishiev, G. ^{[1
]}

Balanda, A. ^{[2
]}

Belver, D. ^{[3
]}

Belyaev, A. ^{[1
]}

Berger-Chen, J. C. ^{[4
]}

Blanco, A. ^{[5
]}

Boehmer, M. ^{[6
]}

Boyard, J. L. ^{[7
]}

Cabanelas, P. ^{[3
]}

Castro, E. ^{[3
]}

Chernenko, S. ^{[1
]}

Christ, T. ^{[6
]}

Destefanis, M. ^{[8
]}

Dohrmann, F. ^{[9
]}

Dybczak, A. ^{[2
]}

Epple, E. ^{[4
]}

Fabbietti, L. ^{[4
]}

Fateev, O. ^{[1
]}

Finocchiaro, P. ^{[10
]}

Fonte, P. ^{[5
,11
]}

Friese, J. ^{[6
]}

Froehlich, I. ^{[12
]}

Galatyuk, T. ^{[12
,13
]}

Garzon, J. A. ^{[3
]}

Gernhaeuser, R. ^{[6
]}

Gilardi, C. ^{[8
]}

Golubeva, M. ^{[14
]}

Gonzalez-Diaz, D. ^{[15
]}

Guber, F. ^{[14
]}

Gumberidze, M. ^{[7
]}

Heinz, T. ^{[16
]}

Hennino, T. ^{[7
]}

Holzmann, R. ^{[16
]}

Ierusalimov, A. ^{[1
]}

Iori, I. ^{[17
,18
]}

Ivashkin, A. ^{[14
]}

Jurkovic, M. ^{[6
]}

Kaempfer, B. ^{[9
,19
]}

Kanaki, K. ^{[9
]}

Karavicheva, T. ^{[14
]}

Koenig, I. ^{[16
]}

Koenig, W. ^{[16
]}

Kolb, B. W. ^{[16
]}

Kotte, R. ^{[9
]}

Krasa, A. ^{[20
]}

Krizek, F. ^{[20
]}

Kruecken, R. ^{[6
]}

Kuc, H. ^{[2
,7
]}

Kuehn, W. ^{[8
]}

Kugler, A. ^{[20
]}

机构：

[1] Joint Inst Nucl Res, Dubna 141980, Russia

[2] Jagiellonian Univ, Smoluchowski Inst Phys, PL-30059 Krakow, Poland

[3] Univ Santiago de Compostela, LabCAF, Dpto Fis Particulars, Santiago De Compostela 15706, Spain

[4] Excellence Cluster Origin & Struct Universe, D-85748 Garching, Germany

[5] LIP Lab Instrumentacao & Fis Expt Paticulars, P-3004516 Coimbra, Portugal

[6] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany

[7] Univ Paris 11, Inst Phys Nucl, UMR 8608, CNRS,IN2P3, F-91406 Orsay, France

[8] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[9] Helmholtz Zentrum Dresden Rossendorf, Inst Strahlenphys, D-01314 Dresden, Germany

[10] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95125 Catania, Italy

[11] ISEC Coimbra, Coimbra, Portugal

[12] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany

[13] ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[14] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[15] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

[16] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[17] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[18] Univ Milan, Dept Fis, I-20133 Milan, Italy

[19] Tech Univ Dresden, D-01062 Dresden, Germany

[20] Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic

[21] Univ Cyprus, Dept Phys, CY-1678 Nicosia, Cyprus

[22] Frederick Univ, CY-1036 Nicosia, Cyprus

[23] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[24] Univ Turin, Dipartimento Fis Gen, I-10125 Turin, Italy

[25] Univ Turin, INFN, I-10125 Turin, Italy

来源：

PHYSICAL REVIEW C | 2013年 / 87卷 / 02期

关键词：

STRANGE-PARTICLE-PRODUCTION; KAONIC HYDROGEN; PHOTOPRODUCTION; CONSTRAINTS; DYNAMICS; ENERGY;

D O I：

10.1103/PhysRevC.87.025201

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：

We present an analysis of the Lambda(1405) resonance produced in the reaction p + p -> Sigma(+/-) + pi(-/+) + K+ + p at 3.5 GeV kinetic beam energy measured with the High Acceptance Dielectron Spectrometer (HADES) at the Gesellschaft fur Schwerionenforschung (GSI). The two charged decay channels Lambda (1405) -> Sigma(+/-) + pi(-/+) have been reconstructed for the first time in p + p collisions. The efficiency and acceptance- corrected spectral shapes show a peak position clearly below 1400MeV/c(2). We find a total production cross section of sigma(Lambda(1405)) = (1405) = 9.2 +/- 0.9 +/- 0.7(-1.0)(+3.3)mu b . The analysis of its polar angle distribution suggests that the Lambda(1405) is produced isotropically in the p - p center-of-mass system (CMS). DOI: 10.1103/ PhysRevC.87.025201

引用

页数：6

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