Bose-Einstein correlations in K±K± pairs from Z0 decays into two hadronic jets

被引：0

作者：

Abbiendi, G ^{[1
]}

Ackerstaff, K

Akesson, PF

Alexander, G

Allison, J

Anderson, KJ

Arcelli, S

Asai, S

Ashby, SF

Axen, D

Azuelos, G

Bailey, I

Ball, AH

Barberio, E

Barlow, RJ

Batley, JR

Baumann, S

Behnke, T

Bell, KW

Bella, G

Bellerive, A

Bentvelsen, S

Bethke, S

Betts, S

Biebel, O

Biguzzi, A

Bloodworth, IJ

Bock, P

Böhme, J

Boeriu, O

Bonacorsi, D

Boutemeur, M

Braibant, S

Bright-Thomas, P

Brigliadori, L

Brown, RM

Burckhart, HJ

Capiluppi, P

Carnegie, RK

Carter, AA

Carter, JR

Chang, CY

Charlton, DG

Chrisman, D

Ciocca, C

Clarke, PEL

Clay, E

Cohen, I

Conboy, JE

Cooke, OC

机构：

[1] Univ Bologna, Dipartmento 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] Carleton Univ, Ctr Res Particle Phys, Ottawa, ON K1S 5B6, Canada

[9] CERN, European Org Particle Phys, CH-1211 Geneva 23, Switzerland

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

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

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

[13] Heidelberg Univ, Dept Phys, D-69120 Heidelberg, Germany

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

[15] Queen Mary Univ London, London E1 4NS, England

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

[17] UCL, London WC1E 6BT, England

[18] Univ Manchester, Schuster Lab, Dept Phys, Manchester M13 9PL, Lancs, England

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

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

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

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

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

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

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

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

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

[28] Brunel Univ, Inst Phys & Environm Sci, Uxbridge UB8 3PH, Middx, England

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

[30] Univ Hamburg, DESY, Inst Expt Phys 2, D-22007 Hamburg, Germany

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

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

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

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

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

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

[37] TRIUMF, Vancouver, BC V6T 2A3, Canada

[38] Univ Min & Met Krakow, Krakow, Poland

[39] Univ Debrecen, Dept Expt Phys, Debrecen, Hungary

[40] MPI Munchen, Munich, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2001年 / 21卷 / 01期

关键词：

D O I：

10.1007/s100520100715

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：

Bose-Einstein correlations in pairs of charged kaons produced in a sample of 3.9 million hadronic Z(0) decays have been measured with the OPAL experiment at LEP. Charged kaons were identified in the central tracking detector using their specific energy loss in the drift chamber gas. The correlation function was studied in two-jet events using a double ratio, formed by the number of like-sign pairs normalised by a reference sample in the data, divided by the same ratio in a Monte Carlo simulation. The enhancement at small values of the four-momentum difference of the pair was parametrised using a Gaussian function. The parameters of the Bose-Einstein correlations were measured to be a lambda = 0.82 +/-0.22(-0.12)(+0.17) for the strength and R-0 = 0.56 +/-0.08(-0.06)(+0.08) fm for the kaon source radius, where the first errors are statistical and the second systematic. Corrections for final-state interactions are discussed.

引用

页码：23 / 32

页数：10

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