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The European Physical Journal C

, Volume 52, Issue 1, pp 133–140 | Cite as

Non-perturbative QCD effects and the top mass at the Tevatron

  • P. SkandsEmail author
  • D. Wicke
Regular Article - Theoretical Physics

Abstract

We present a new, universally applicable toy model of colour reconnections in hadronic final states. The model is based on hadronising strings and has one free parameter. We next present an implementation of this model in the PYTHIA event generator and provide several parameter sets (‘tunes’), constrained by fits to Tevatron minimum-bias data. Finally, we consider the sensitivity of a simplified top mass analysis to these effects, in exclusive semi-leptonic top events at the Tevatron. A first attempt at isolating the genuine non-perturbative effects gives an estimate of order δmtop ∼ ±0.5 GeV from non-perturbative uncertainties, and a further δmtop ∼ ±1 GeV from shower effects.

Keywords

Parton Shower Hadron Collision Underlying Event Colour Reconnection Beam Remnant 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Tevatron Electroweak Working Group, Combination of cdf and d0 results on the mass of the top quark (2006), http://www-cdf.fnal.gov/physics/new/top/top.html, see also hep-ex/0608032Google Scholar
  2. 2.
    A. Bhatti et al., Nucl. Instrum. Methods A 566, 375 (2006)CrossRefADSGoogle Scholar
  3. 3.
    J. D’Hondt, S. Lowette, J. Heyninck, S. Kasselmann, Light quark jet energy scale calibration using the W mass constraint in single-leptonic t anti-t events (2006), CERN-CMS-NOTE-2006-025Google Scholar
  4. 4.
    M.L. Mangano, T.J. Stelzer, Ann. Rev. Nucl. Part. Sci. 55, 555 (2005)CrossRefADSGoogle Scholar
  5. 5.
    S. Höche et al., Matching parton showers and matrix elements (2006)Google Scholar
  6. 6.
    T. Sjöstrand, Monte Carlo generators (2006)Google Scholar
  7. 7.
    E. Norrbin, T. Sjöstrand, Nucl. Phys. B 603, 297 (2001)CrossRefADSGoogle Scholar
  8. 8.
    S. Frixione, P. Nason, B.R. Webber, JHEP 08, 007 (2003)CrossRefADSGoogle Scholar
  9. 9.
    K. Hamilton, P. Richardson, JHEP 2, 069 (2007)CrossRefADSGoogle Scholar
  10. 10.
    M.L. Mangano, M. Moretti, F. Piccinini, M. Treccani, JHEP 01, 013 (2007)CrossRefADSGoogle Scholar
  11. 11.
    T. Affolder et al., Phys. Rev. D 65, 092002 (2002)CrossRefADSGoogle Scholar
  12. 12.
    R. Field, R.C. Group, Pythia Tune A, Herwig, and Jimmy in run 2 at CDF (2005)Google Scholar
  13. 13.
    R. Field, AIP Conf. Proc. 828, 163 (2006)CrossRefADSGoogle Scholar
  14. 14.
    S. Abdullin et al., Sensitivity of the muon isolation cut efficiency to the underlying event uncertainties (2006), CERN-CMS-NOTE-2006-033Google Scholar
  15. 15.
    D. Acosta et al., The underlying event at the LHC (2006) CERN-CMS-NOTE-2006-067Google Scholar
  16. 16.
    M. Albrow et al., Tevatron-for-LHC report of the QCD working group (2006)Google Scholar
  17. 17.
    T. Sjöstrand, M. van Zijl, Phys. Rev. D 36, 2019 (1987)CrossRefADSGoogle Scholar
  18. 18.
    J.M. Butterworth, J.R. Forshaw, M.H. Seymour, Z. Phys. C 72, 637 (1996)CrossRefGoogle Scholar
  19. 19.
    T. Sjöstrand, P.Z. Skands, JHEP 03, 053 (2004)CrossRefADSGoogle Scholar
  20. 20.
    T. Sjöstrand, P.Z. Skands, Eur. Phys. J. C 39, 129 (2005)CrossRefADSGoogle Scholar
  21. 21.
    M. Sandhoff, P. Skands, Colour annealing: A toy model of colour reconnections (2005), FERMILAB-CONF-05-518-T, In Les Houches ‘Physics at TeV Colliders’ (2005) SM and Higgs Working Group: Summary report, hep-ph/0602198Google Scholar
  22. 22.
    M. Sandhoff, Untersuchung des Farblusses in hadronischen top-Quark-Zerfällen am D0-Experiment (2005) Diploma Thesis, Bergische Universität Wuppertal, WU D 05-08Google Scholar
  23. 23.
    G. Gustafson, U. Pettersson, P.M. Zerwas, Phys. Lett. B 209, 90 (1988)CrossRefADSGoogle Scholar
  24. 24.
    T. Sjöstrand, V.A. Khoze, Phys. Rev. Lett. 72, 28 (1994)CrossRefADSGoogle Scholar
  25. 25.
    T. Sjöstrand, V.A. Khoze, Z. Phys. C 62, 281 (1994)CrossRefGoogle Scholar
  26. 26.
    B. Andersson, G. Gustafson, G. Ingelman, T. Sjöstrand, Phys. Rep. 97, 31 (1983)CrossRefADSGoogle Scholar
  27. 27.
    X. Artru, Phys. Rep. 97, 147 (1983)CrossRefADSGoogle Scholar
  28. 28.
    V.A. Khoze, T. Sjöstrand, Phys. Lett. B 328, 466 (1994)CrossRefADSGoogle Scholar
  29. 29.
    G. Gustafson, J. Häkkinen, Z. Phys. C 64, 659 (1994)CrossRefGoogle Scholar
  30. 30.
    L. Lönnblad, Z. Phys. C 70, 107 (1996)CrossRefGoogle Scholar
  31. 31.
    C. Friberg, G. Gustafson, J. Häkkinen, Nucl. Phys. B 490, 289 (1997)CrossRefADSGoogle Scholar
  32. 32.
    B.R. Webber, J. Phys. G 24, 287 (1998)CrossRefADSGoogle Scholar
  33. 33.
    W. Buchmüller, A. Hebecker, Phys. Lett. B 355, 573 (1995)CrossRefADSGoogle Scholar
  34. 34.
    A. Edin, G. Ingelman, J. Rathsman, Phys. Lett. B 366, 371 (1996)CrossRefADSGoogle Scholar
  35. 35.
    J. Rathsman, Phys. Lett. B 452, 364 (1999)CrossRefADSGoogle Scholar
  36. 36.
    R. Enberg, G. Ingelman, N. Timneanu, Phys. Rev. D 64, 114015 (2001)CrossRefADSGoogle Scholar
  37. 37.
    A. Edin, G. Ingelman, J. Rathsman, Phys. Rev. D 56, 7317 (1997)CrossRefADSGoogle Scholar
  38. 38.
    G. Abbiendi et al., Phys. Lett. B 453, 153 (1999)CrossRefADSGoogle Scholar
  39. 39.
    G. Abbiendi et al., Eur. Phys. J. C 45, 291 (2006)CrossRefADSGoogle Scholar
  40. 40.
    S. Schael et al., Eur. Phys. J. C 48, 685 (2006)CrossRefADSGoogle Scholar
  41. 41.
    J. Abdallah et al., Phys. Lett. B 643, 147 (2006)CrossRefADSGoogle Scholar
  42. 42.
    T. Sjöstrand, S. Mrenna, P. Skands, JHEP 05, 026 (2006), http://projects.hepforge.org/pythia6/CrossRefADSGoogle Scholar
  43. 43.
    G. Gustafson, Phys. Lett. B 175, 453 (1986)CrossRefADSGoogle Scholar
  44. 44.
    G. Gustafson, U. Pettersson, Nucl. Phys. B 306, 746 (1988)CrossRefADSGoogle Scholar
  45. 45.
    B. Andersson, G. Gustafson, B. Söderberg, Z. Phys. C 20, 317 (1983)CrossRefGoogle Scholar
  46. 46.
    T. Sjöstrand, P.Z. Skands, Nucl. Phys. B 659, 243 (2003)CrossRefADSGoogle Scholar
  47. 47.
    R.D. Field, Private communication (2007)Google Scholar
  48. 48.
    G. Rudolph, Private communicationGoogle Scholar
  49. 49.
    A. Abulencia et al., Phys. Rev. D 73, 032003 (2006)CrossRefADSGoogle Scholar
  50. 50.
    A. Abulencia et al., Phys. Rev. D 73, 092002 (2006)CrossRefADSGoogle Scholar
  51. 51.
    V.M. Abazov, Phys. Rev. D 74, 092005 (2006)CrossRefADSGoogle Scholar
  52. 52.
    D0, Measurement of the top quark mass in the lepton + jets channel using DO Run II data: The low bias template method, D0note 4728.conf (2005)Google Scholar
  53. 53.
    V. Abazov, Phys. Rev. D 75, 092001 (2007)CrossRefADSGoogle Scholar
  54. 54.
    J.M. Butterworth, J.P. Couchman, B.E. Cox, B.M. Waugh, Ktjet: A c++ implementation of the k clustering algorithm, October 2002, MAN/HEP/2002/02, UCL/HEP 2002-02Google Scholar
  55. 55.
    W.G. Plano, Cone jet implementation in the kTjet-package, University of Manchester, Private communicationsGoogle Scholar

Copyright information

© Springer-Verlag / Società Italiana di Fisica 2007

Authors and Affiliations

  1. 1.Theoretical Physics, MS106Fermi National Accelerator LaboratoryBataviaUSA
  2. 2.Fachbereich C, PhysikBergische UniversitätWuppertalGermany

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