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Two-dimensional analysis of Bose-Einstein correlationsin hadronic Z decays at LEP

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Abstract.

Bose-Einstein correlations are studied in pairs of charged pions from hadronic Z decays, collected by the ALEPH detector. The correlation function, measured using either the unlike-sign or the mixed reference sample, is studied in terms of the Lorentz-invariant four-momentum difference and its transverse, Q T, and longitudinal, Q L, components with respect to the longitudinal centre-of-mass system. Values for the correlation radii, R T and R L, are obtained from the fit of the Goldhaber parametrisation. The results indicate that the correlation radii values depend on the chosen kind of reference sample and on the two-jet purity.

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References

  1. G. Goldhaber et al. , Pion-pion correlations in antiproton annihilation events, Phys. Rev. Lett. 3, 181 (1959)

    Article  Google Scholar 

  2. B. Lörstad, Boson Interferometry - A Review of high-energy data and its interpretation, Int. J. Mod. Phys. A 4, 2861 (1989); D.H. Boal, C.K. Gelbke, B.K. Jennings, Intensity interferometry in subatomic physics, Rev. Mod. Phys. 62, 553 (1990); G. Baym, The physics of Hanbury Brown-Twiss intensity interferometry: from stars to nuclear collisions, Acta Phys. Polon. B 29, 1839 (1998); G. Alexander, Bose-Einstein and Fermi-Dirac interferometry in particle physics, Rep. Prog. Phys. 66, 481 (2003)

    Google Scholar 

  3. Mark II Coll., D. Schlatter et al. , Measurement of energy correlations in \(\textrm{e}^+\textrm{e}^- \to\) hadrons, Phys. Rev. Lett. 49, 521 (1982)

    Article  Google Scholar 

  4. CLEO Coll., P. Avery et al. , Bose-Einstein correlations in \(\textrm{e}^+\textrm{e}^-\) annihilation in the \(\Upsilon\) region, Phys. Rev. D 32, 2294 (1985)

    Article  Google Scholar 

  5. TASSO Coll., M. Althoff et al. , Bose-Einstein correlations observed in \(\textrm{e}^+\textrm{e}^-\) annihilation at a center-of-mass energy of 34 GeV, Z. Phys C 30, 355 (1986)

    Google Scholar 

  6. TPC Coll., H. Aihara et al. , Study of Bose-Einstein correlations in \(\textrm{e}^+\textrm{e}^-\) annihilation at 29 GeV, Phys. Rev. D 31, 996 (1985)

    Article  Google Scholar 

  7. ALEPH Coll., D. Decamp et al. , A study of Bose-Einstein correlations in \(\textrm{e}^+\textrm{e}^-\) annihilation at 91 GeV, Z. Phys. C 54, 75 (1992)

    Google Scholar 

  8. DELPHI Coll., P. Abreu et al. , Bose-Einstein correlations in the hadronic decays of the Z, Phys. Lett. B 286, 201 (1992)

    Article  Google Scholar 

  9. L3 Coll., P. Achard et al. , Bose-Einstein correlations of neutral and charged pions in hadronic Z decays, Phys. Lett. B 524, 55 (2002)

    Article  Google Scholar 

  10. OPAL Coll., P.D. Acton et. al., A study of Bose-Einstein Correlations in \(\textrm{e}^+\textrm{e}^-\) annihilations at LEP, Phys. Lett. B 267, 143 (1991)

    Article  Google Scholar 

  11. B. Andersson, G. Gustafson, G. Ingelman, T. Sjöstrand, Parton fragmentation and string dynamics, Phys. Rep. 97, 31 (1983)

    Article  Google Scholar 

  12. B. Andersson, M. Ringnér, Transverse and longitudinal Bose-Einstein correlations, Phys. Lett. B 421, 283 (1998); Bose-Einstein correlations in the Lund model, Nucl. Phys. B 513, 627 (1998)

    Article  Google Scholar 

  13. DELPHI Coll., P. Abreu et al. , Two-dimensional analysis of the Bose-Einstein correlations in \(\textrm{e}^+\textrm{e}^-\) annihilation at the Z peak, Phys. Lett. B 471, 460 (2000)

    Article  Google Scholar 

  14. L3 Coll., M. Acciarri et al. , Measurement of an elongation of the pion source in Z decays, Phys. Lett. B 458, 517 (1999)

    Article  Google Scholar 

  15. OPAL Coll., G. Abbiendi et al. , Transverse and longitudinal Bose-Einstein correlations in hadronic \(\textrm{Z}^0\) decays, Eur. Phys. J. C 16, 423 (2000)

    Google Scholar 

  16. T. Sjöstrand et al. , High-energy physics event generation with Pythia 6.1 , Comp. Phys. Comm. 135, 238 (2001)

    Article  Google Scholar 

  17. G. Goldhaber, S. Goldhaber, W.Y. Lee, A. Pais, Influence of Bose-Einstein statistics on the antiproton proton annihilation process, Phys. Rev. 120, 300 (1960); M. Deutschmann et al. , A study of second-order interference for pions produced in various hadronic interactions, Nucl. Phys. B 204, 333 (1982)

    Article  Google Scholar 

  18. M.G. Bowler, Bose-Einstein symmetrization, coherence and chaos, with particular application to \(\textrm{e}^+\textrm{e}^-\) annihilation, Z. Phys. C 29 (1985)

  19. ALEPH Coll., D. Decamp et al. ,ALEPH: A detector for Electron-positron annihilations at LEP, Nucl. Instrum. Methods A 294, 121 (1990)

    Google Scholar 

  20. ALEPH Coll., D. Buskulic et al. , Performance of the ALEPH detector at LEP, Nucl. Instrum. Methods A 360, 481 (1995)

    Google Scholar 

  21. ALEPH Coll., R. Barate et al. , Studies of quantum chromodynamics with the ALEPH detector, Phys. Rep. 294, 1 (1996)

    Google Scholar 

  22. ALEPH Coll., R. Barate et al. , A precise measurement of \(\Gamma_{\mathrm{Z} \to \mathrm{b}\bar{\mathrm{b}}} / \Gamma_{\mathrm{Z} \to \mathrm{hadrons}}\), Phys. Lett. B 313, 535 (1993)

    Article  Google Scholar 

  23. S. Haywood, Where are we going with Bose-Einstein - A mini review, Rutherford Lab. Report RAL-94-074 (1995)

  24. K. Fialkowski, R. Wit, A note on Monte Carlo imitation of Bose-Einstein interference effects, Z. Phys. C 74, 145 (1997)

    Article  Google Scholar 

  25. L. Lönnblad, T. Sjöstrand, Modelling Bose-Einstein correlations at LEP 2, Eur. Phys. J. C 2, 165 (1998)

    Article  Google Scholar 

  26. R. Muresan, O. Smirnova, B. Lörstad, Appearance of an artificial length scale in JETSET Bose-Einstein simulation, Eur. Phys. J. C 6, 629 (1999)

    Article  Google Scholar 

  27. O. Smirnova, B. Lörstad, R. Muresan, Tests of the JETSET Bose-Einstein correlation model in the \(\mathrm{e}^+\mathrm{e}^-\) annihilation process, arXiv:hep-ex/9808032

  28. S. Catani et al. , New clustering algorithm for multi-jet cross-sections in \(\textrm{e}^+\textrm{e}^-\) annihilation, Phys. Lett. B 269, 432 (1991)

    Article  Google Scholar 

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Received: 23 April 2004, Revised: 11 May 2004, Published online: 9 July 2004

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The ALEPH Collaboration. Two-dimensional analysis of Bose-Einstein correlationsin hadronic Z decays at LEP. Eur. Phys. J. C 36, 147–159 (2004). https://doi.org/10.1140/epjc/s2004-01884-3

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