Bose-Einstein correlations in e+e- → W+W- at 172 and 183 GeV

被引：18

作者：

Abbiendi, G ^{[1
]}

Ackerstaff, K

Alexander, G

Allison, J

Altekamp, N

Anderson, KJ

Anderson, S

Arcelli, S

Asai, S

Ashby, SF

Axen, D

Azuelos, G

Ball, AH

Barberio, E

Barlow, RJ

Bartoldus, R

Batley, JR

Baumann, S

Bechtluft, J

Behnke, T

Bell, KW

Bella, G

Bellerive, A

Bentvelsen, S

Bethke, S

Betts, S

Biebel, O

Biguzzi, A

Bird, SD

Blobel, V

Bloodworth, IJ

Bock, P

Böhme, J

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

机构：

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

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

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

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

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

[6] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, 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] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany

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

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

[16] Tech Hsch 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] Kobe Univ, Kobe, Hyogo 6578501, Japan

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

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

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

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

[29] Univ Hamburg, DESY, Inst Expt Phys 2, D-22607 Hamburg, Germany

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

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

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

[33] Duke Univ, Dept Phys, Durham, NC 27708 USA

[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] Lajos Kossuth Univ, Dept Expt Phys, Debrecen, Hungary

来源：

EUROPEAN PHYSICAL JOURNAL C | 1999年 / 8卷 / 04期

关键词：

D O I：

10.1007/s100520050491

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 between like-charge pions are studied in hadronic final states produced by e(+)e(-) annihilations at center-of-mass energies of 172 and 183 GeV. Three event samples are studied, each dominated by one of the processes W(+)W(-) --> q (q) over bar l (v) over bar i, W(+)W(-) --> q (q) over bar q (q) over bar, or (Z(0)/gamma)* --> q (q) over bar. After demonstrating the existence of Bose-Einstein correlations in W decays, an attempt is made to determine Bose-Einstein correlations for pions originating front the same W boson and from different W bosons, as well as for pions from (Z(0)/gamma)* --> q (q) over bar events. The following results are obtained for the individual chaoticity parameters lambda, assuming a common source radius R: lambda(same) = 0.63+/- 0.19 +/- 0.14 lambda(diff) = 0.22 +/- 0.53 +/- 0.14 lambda(Z*) = 0.47 +/- 0.11 +/- 0.08 R = 0.92 =/- 0.09 +/- 0.09 fm In each case, the first error is statistical and the second is sq systematic. At the current level of statistical precision it is not established whether Bose-Einstein correlations, between pions from different W bosons exist or not.

引用

页码：559 / 571

页数：13

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