Abstract.
Bose-Einstein correlations between like-sign charged-particle pairs in \({\rm e}^ + {\rm e}^-\to {\rm W}^ + {\rm W}^-\) events recorded with the OPAL detector at LEP at centre-of-mass energies between 183 GeV and 209 GeV are studied. Recently proposed methods which allow direct searches for correlations in the data via distributions of test variables are used to investigate the presence of correlations between hadrons originating from different W bosons in \({\rm W}^ + {\rm W}^-\to {\rm q\bar{q}q\bar{q}}\) events. Within the statistics of the data sample no evidence for inter-WW Bose-Einstein correlations is obtained. The data are also compared with predictions of a recent implementation of Bose-Einstein correlation effects in the Monte Carlo model PYTHIA
Similar content being viewed by others
References
E.A. De Wolf, I.M. Dremin, W. Kittel, Phys. Rep. 270, 1 (1996); I.G. Knowles, G.D. Lafferty, J. Phys. G 23, 731 (1997)
R. Hanbury Brown, R.Q. Twiss, Phil. Mag. 45, 663 (1954); Nature 178, 1076 (1956)
B. Andersson, W. Hofmann, Phys. Lett. B 169, 364 (1986); B. Andersson, M. Ringnér, Phys. Lett. B 421, 283 (1998); Nucl. Phys. B 513, 627 (1998)
B. Andersson, The Lund Model, Cambridge University Press, 1998; B. Andersson et al. , Recent developments in the Lund model, Proc. XXXVI Annual Winter School on Nuclear and Particle Physics and VIII St. Petersburg School on Theoretical Physics, St. Petersburg (Russia), 2002, hep-ph/0212122
G. Goldhaber et al. , Phys. Rev. Lett. 3, 181 (1959); G. Goldhaber et al. , Phys. Rev. 120, 300 (1960)
W. Kittel, Lectures at 41st Course of Cracow School of Theoretical Physics, Zakopane (Poland), 2001, Acta Phys. Pol. B 32, 3927 (2001)
OPAL Collaboration, G. Abbiendi et al. , Phys. Lett. B 523, 35 (2001)
G. Alexander, Rep. Prog. Phys. 66, 481 (2003)
W.J. Metzger, Bose-Einstein and other correlations in hadronic Z decay, Proc. XXXVIII Les Rencontres de Moriond: QCD and Hadronic Interactions, Les Arcs (France), 2003, hep-ex/0304025
DELPHI Collaboration, P. Abreu et al. , Phys. Lett. B 401, 181 (1997); OPAL Collaboration, G. Abbiendi et al. , Eur. Phys. J. C 8, 559 (1999); ALEPH Collaboration, R. Barate et al. , Phys. Lett. B 478, 50 (2000)
L3 Collaboration, M. Acciarri et al. , Phys. Lett. B 493, 233 (2000); L3 Collaboration, P. Achard et al. , Phys. Lett. B 547, 139 (2002)
S.V. Chekanov, E.A. De Wolf, W. Kittel, Eur. Phys. J. C 2, 403 (1999)
E.A. De Wolf, Correlations in e+e\(^- \to\) W+W− hadronic decays, hep-ph/0101243
P. de Jong, Final state interactions at LEP2, Proc. Int. Europhysics Conference on High Energy Physics: EPS-HEP 2003, Aachen (Germany), 2003, hep-ex/0309012; E. Barberio, W physics at LEP, Proc. XXIII Int. Conference on Physics in Collision, Zeuthen (Germany), 2003, DESY-PROC-2003-2, p. 317, eConf C030626 (2003) SABT02; N. van Remortel, Bose-Einstein Correlations in Hadronic W Decays at LEP, Proc. XXXIII Int. Symposium on Multiparticle Dynamics: ISMD 2003, Cracow (Poland), 2003, Acta Phys. Pol. B 35, 55 (2004); A. Straessner, Measurement of the W boson mass at LEP, Proc. XXXIX Les Rencontres de Moriond: Electroweak Interactions and Unified Theories, La Thuile (Italy), 2004, hep-ex/0405005
The LEP Collaborations ALEPH, DELPHI, L3, OPAL, the LEP Electroweak Working Group, and the SLD Electroweak and Heavy Flavour Groups, A combination of preliminary electroweak measurements and constraints on the Standard Model, hep-ex/0312023 and LEPEWWG/2003-02 (see http://www.cern.ch/LEPEWWG)
OPAL Collaboration, K. Ahmet et al. , Nucl. Instr. Meth. A 305, 275 (1991); OPAL Collaboration, P.P. Allport et al. , Nucl. Instr. Meth. A 346, 476 (1994); S. Anderson et al. , Nucl. Instr. Meth. A 403, 326 (1998)
OPAL Collaboration, R. Akers et al. , Z. Phys. C 67, 389 (1995)
OPAL Collaboration, G. Abbiendi et al. , Eur. Phys. J. C 8, 191 (1999); Phys. Lett. B 493, 249 (2000)
T. Sjöstrand, Comput. Phys. Commun. 82, 74 (1994); T. Sjöstrand et al. , Comput. Phys. Commun. 135, 238 (2001)
J. Allison et al. , Nucl. Instr. Meth. A 317, 47 (1992)
T. Sjöstrand, L. Lönnblad, Eur. Phys. J. C 2, 165 (1998)
OPAL Collaboration, G. Alexander et al. , Z. Phys. C 69, 543 (1996)
L. Lönnblad, Z. Phys. C 70, 107 (1996)
Author information
Consortia
Additional information
Received: 24 March 2004, Revised: 7 June 2004, Published online: 20 July 2004
Rights and permissions
About this article
Cite this article
The OPAL Collaboration. Study of Bose-Einstein correlations in \({\rm e}^ + {\rm e}^-\to {\rm W}^ + {\rm W}^-\) events at LEP. Eur. Phys. J. C 36, 297–308 (2004). https://doi.org/10.1140/epjc/s2004-01961-7
Issue Date:
DOI: https://doi.org/10.1140/epjc/s2004-01961-7