Electroweak corrections uncertainty on the W mass measurement at LEP

Theoretical Physics

Abstract.

The systematic uncertainty on the W mass and width measurement resulting from the imperfect knowledge of electroweak radiative corrections is discussed. The intrinsic uncertainty in the 4-f generator used by the DELPHI Collaboration is studied following the guidelines of the authors of YFSWW, on which its radiative corrections part is based. The full DELPHI simulation, reconstruction and analysis chain is used for the uncertainty assessment. A comparison with the other available 4-f calculation implementing DPA \({\cal O}(\alpha)\) corrections, RacoonWW, is also presented. The uncertainty on the W mass is found to be below 10 MeV for all the WW decay channels used in the measurement.

Keywords

Elementary Particle Quantum Field Theory Systematic Uncertainty Mass Measurement Particle Acceleration 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Physics at LEP2, edited by G. Altarelli, T. Sjöstrand, F. Zwirner CERN 96-01 (1996)Google Scholar
  2. 2.
    M. Grünewald et al. , Four-Fermion Production in Electron-Positron Collisions, in Report of the Working Groups on precision calculations for LEP2 physics, edited by S. Jadach, G. Passarino, R. Pittau, CERN 2000-009, 1 (2000) [hep-ph/0005309]Google Scholar
  3. 3.
    M. Veltman, Physica 29, 186 (1963); R.G. Stuart, Phys. Lett. B262, 113 (1991); A. Aeppli, G.J. van Oldenborgh, D. Wyler, Nucl. Phys. B 428, 126 (1994)Google Scholar
  4. 4.
    W. Beenakker, F.A. Berends, A.P. Chapovsky, Nucl. Phys. B 548, 3 (1999)CrossRefGoogle Scholar
  5. 5.
    A. Denner, Fortschr. Phys. 41, 307 (1993); A. Denner, G. Weiglein, S. Dittmaier, Nucl. Phys. B 440, 95 (1995); A. Denner, S. Dittmaier, M. Roth, Nucl. Phys. B 519, 39 (1998)Google Scholar
  6. 6.
    S. Jadach, W. Placzek, M. Skrzypek, B.F.L. Ward, Phys. Rev. D 54, 5434 (1996); S. Jadach, W. Placzek, M. Skrzypek, B.F.L. Ward, Z. Was, Phys. Lett. B 417, 326 (1998); Phys. Rev. D 61, 113010 (2000); Comp. Phys. Commun. 140, 432 (2001); Phys. Rev. D 65, 093010 (2002)CrossRefGoogle Scholar
  7. 7.
    A. Denner, S. Dittmaier, M. Roth, D. Wackeroth, Nucl. Phys. B 560, 33 (1999); B 587, 67 (2000); Eur. Phys. J. C 20, 201 (2001); Comp. Phys. Commun. 153, 462 (2003)CrossRefGoogle Scholar
  8. 8.
    R. Chierici, F. Cossutti, Eur. Phys. J. C 23, 65 (2002)CrossRefGoogle Scholar
  9. 9.
    S. Jadach, W. Placzek, M. Skrzypek, B.F.L. Ward, Z. Was, Phys. Lett. B 523, 117 (2001)CrossRefGoogle Scholar
  10. 10.
    R. Bruneliére et al. , Phys. Lett. B 533, 75 (2002)CrossRefGoogle Scholar
  11. 11.
    A. Ballestrero, R. Chierici, F. Cossutti, E. Migliore, Comp. Phys. Commun. 152, 175 (2003)CrossRefGoogle Scholar
  12. 12.
    E. Accomando, A. Ballestrero, Comp. Phys. Commun. 99, 270 (1997); E. Accomando, A. Ballestrero, E. Maina, Comp. Phys. Commun. 150, 166 (2003)CrossRefGoogle Scholar
  13. 13.
    S. Jadach, W. Placzek, M. Skrzypek, B.F.L. Ward, Z. Was, Comp. Phys. Commun. 119, 272 (1999)CrossRefGoogle Scholar
  14. 14.
    S. Jadach, W. Placzek, M. Skrzypek, B.F.L. Ward, Z. Was, Comp. Phys. Commun. 140, 475 (2001)CrossRefGoogle Scholar
  15. 15.
    Y. Kurihara, J. Fujimoto, T. Munehisa, Y. Shimizu, Progr. Theor. Phys. 96, 1223 (1996)CrossRefGoogle Scholar
  16. 16.
    E. Barberio, Z. Was, Comp. Phys. Commun. 79, 291 (1994)CrossRefGoogle Scholar
  17. 17.
    G. Nanava, Z. Was, Acta Phys. Polon. B 34, 4561 (2003)Google Scholar
  18. 18.
    R.G. Stuart, Nucl. Phys. B 498, 28 (1997), and references thereinCrossRefGoogle Scholar
  19. 19.
    W. Beenakker et al. , WW Cross-Sections and Distributions, in Physics at LEP2, edited by G. Altarelli, T. Sjöstrand, F. Zwirner CERN 96-01 (1996), Vol. 1, 79Google Scholar
  20. 20.
    A.P. Chapovsky, V.A. Khoze, Eur. Phys. J. C 9, 449 (1999)CrossRefGoogle Scholar
  21. 21.
    D. Bardin, A. Leike, T. Riemann, M. Sachwitz, Phys. Lett. B 206, 539 (1988)CrossRefGoogle Scholar
  22. 22.
    B. Efron, Computers and the Theory of Statistics, SIAM Rev. 21, 460 (1979); B. Efron, R. Tibshirani, An introduction to the bootstrap (Chapman & Hall 1993), ISBN 0-412-04231-2CrossRefGoogle Scholar
  23. 23.
    DELPHI Collab., P. Abreu et al. , Phys. Lett. B 511, 159 (2001)CrossRefGoogle Scholar
  24. 24.
    T. Sjöstrand et al. , Comp. Phys. Commun. 135, 238 (2001)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  1. 1.INFNSezione di TriesteTriesteItaly

Personalised recommendations