Σ--antihyperon correlations in Z0 decay and investigation of the baryon production mechanism

被引：3

作者：

Abbiendi, G. ^{[1
,2
]}

Ainsley, C. ^{[6
]}

Akesson, P. F. ^{[8
]}

Alexander, G. ^{[23
]}

Anagnostou, G. ^{[3
]}

Anderson, K. J. ^{[9
,10
]}

Asai, S. ^{[24
,25
,26
]}

Axen, D. ^{[30
]}

Bailey, I. ^{[29
]}

Barberio, E. ^{[8
]}

Barillari, T. ^{[35
]}

Barlow, R. J. ^{[17
]}

Batley, R. J. ^{[6
]}

Bechtle, P. ^{[28
]}

Behnke, T. ^{[28
]}

Bell, K. W. ^{[21
]}

Bell, P. J. ^{[3
]}

Bella, G. ^{[23
]}

Bellerive, A. ^{[7
]}

Benelli, G. ^{[5
]}

Bethke, S. ^{[35
]}

Biebel, O. ^{[34
]}

Boeriu, O. ^{[11
]}

Bock, P. ^{[12
]}

Boutemeur, M. ^{[34
]}

Braibant, S. ^{[1
,2
]}

Brown, R. M. ^{[21
]}

Burckhart, H. J. ^{[8
]}

Campana, S. ^{[5
]}

Capiluppi, P. ^{[1
,2
]}

Carnegie, R. K. ^{[7
]}

Carter, A. A. ^{[14
]}

Carter, J. R. ^{[6
]}

Chang, C. Y. ^{[18
]}

Charlton, D. G. ^{[3
]}

Ciocca, C. ^{[1
,2
]}

Csilling, A. ^{[32
]}

Cuffiani, M. ^{[1
,2
]}

Dado, S. ^{[22
]}

Dallavalle, M. ^{[1
,2
]}

De Roeck, A. ^{[8
]}

De Wolf, E. A. ^{[8
]}

Desch, K. ^{[28
]}

Dienes, B. ^{[33
]}

Dubbert, J. ^{[34
]}

Duchovni, E. ^{[27
]}

Duckeck, G. ^{[34
]}

Duerdoth, I. P. ^{[17
]}

Etzion, E. ^{[23
]}

Fabbri, F. ^{[1
,2
]}

机构：

[1] Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy

[2] Ist Nazl Fis Nucl, I-40126 Bologna, Italy

[3] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[4] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[5] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[6] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[7] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada

[8] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland

[9] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[10] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[11] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

[12] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

[13] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[14] Univ London, Univ London Queen Mary & Westfield Coll, London E1 4NS, England

[15] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[16] UCL, London WC1E 6BT, England

[17] Univ Manchester, Schuster Lab, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[18] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[19] Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada

[20] Univ Oregon, Dept Phys, Eugene, OR 97403 USA

[21] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[22] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[23] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel

[24] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 1130033, Japan

[25] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[26] Kobe Univ, Kobe, Hyogo 6578501, Japan

[27] Weizmann Inst Sci, Particle Phys Dept, IL-76100 Rehovot, Israel

[28] Univ Hamburg, DESY, Inst Expt Phys, D-22607 Hamburg, Germany

[29] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada

[30] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada

[31] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[32] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

[33] Inst Nucl Res, H-4001 Debrecen, Hungary

[34] Univ Munich, Sekt Phys, D-85748 Garching, Germany

[35] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[36] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

EUROPEAN PHYSICAL JOURNAL C | 2009年 / 64卷 / 04期

关键词：

PARTON FRAGMENTATION; HADRON-PRODUCTION; PARTICLE SPECTRA; GLUON JETS; K-+/; LAMBDA; QUARK; DETECTOR; PI(+/-); K-S(0);

D O I：

10.1140/epjc/s10052-009-1175-z

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Data collected around vs root s = 91 GeV by the OPAL experiment at the LEP e(+)e(-) collider are used to study the mechanism of baryon formation. As the signature, the fraction of Sigma(-) hyperons whose baryon number is compensated by the production of a (Sigma(-)) over bar, (Lambda) over bar or (Xi(-)) over bar antihyperon is determined. The method relies entirely on quantum number correlations of the baryons, and not rapidity correlations, making it more model independent than previous studies. Within the context of the JETSET implementation of the string hadronization model, the diquark baryon production model without the popcorn mechanism is strongly disfavored with a significance of 3.8 standard deviations including systematic uncertainties. It is shown that previous studies of the popcorn mechanism with Lambda(Lambda) over bar and p pi(p) over bar correlations are not conclusive, if parameter uncertainties are considered.

引用

页码：609 / 625

页数：17

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