Towards precision determination of the top-quark massfrom \(\mathbf M_{b\ell}\) distribution in semi-leptonic decays

Theoretical Physics

Abstract.

We explore a possibility of optimization of the method of determination of the top-quark mass from the \(M_{b\ell}\) distribution in semi-leptonic decays \(t \to b \ell\nu\) at the LHC and a future linear collider (LC). We discover that the systematic and statistical errors of M t determination can be diminished if considering the high moments over the distribution. In the case of LHC this allows one to reduce the errors by more than a factor of two, and in the case of LC to approach the precision expected by studying the threshold scan of the total cross section \(e^ + e^- \to t\bar{t}\).

Keywords

Field Theory Elementary Particle Quantum Field Theory Statistical Error Total Cross Section 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    M. Beneke et al. (conveners), A. Ahmadov et al. , Top quark physics, CERN 2000-004 [hep-ph/0003033]Google Scholar
  2. 2.
    J.A. Aguilar-Saavedra et al. (ECFA/DESY LC physics working group), TESLA technical design report Part III, DESY-01-011 [hep-ph/0106315]Google Scholar
  3. 3.
    T. Abe et al. (American Linear Collider Working Group), Linear Collider physics resource book for Snowmass 2001, in: Proceedings of the APS/DPF/DPB Summer Study on the Future of Particle Physics (Snowmass 2001), edited by N. Graf, SLAC-R-570 [Parts 1-4: hep-ex/0106055-hep-ex/0106058]Google Scholar
  4. 4.
    K. Abe et al. (ACFA linear collider working group) (ed.), Particle physics experiments at JLC, KEK-REPORT-2001-11 [hep-ph/0109166]Google Scholar
  5. 5.
    E. Accomando et al. (Report of the CLIC Physics Working Group), Physics at the CLIC multi-TeV linear collider, CERN-2004-005[hep-ph/0412251]Google Scholar
  6. 6.
    A. Kharchilava, Phys. Lett. B 476, 73 (2000)CrossRefADSGoogle Scholar
  7. 7.
    V.S. Fadin, V.A. Khose, JETP Lett. 46, 525 (1987); Sov. Nucl. Phys. 48, 309 (1988); Physics of elementary particles. Proc. XXIV LNPI Winter School, Leningrad, 1989, p. 3ADSGoogle Scholar
  8. 8.
    A.H. Hoang, M. Beneke, K. Melnikov, T. Nagano, A. Ota, A.A. Penin, A.A. Pivovarov, A. Signer, V.A. Smirnov, Y. Sumino, T. Teubner, O. Yakovlev, A. Yelkhovsky, Jur. Phys. J. Direct C 3, 1 (2002)MATHGoogle Scholar
  9. 9.
    A.H. Hoang, A.V. Manohar, I.V. Stewart, T. Teubner, Phys. Rev. D 65, 014014 (2002)CrossRefADSGoogle Scholar
  10. 10.
    M. Martinez, R. Miquel, Eur. Phys. J. C 27, 49-55 (2003)ADSGoogle Scholar
  11. 11.
    S.V. Chekanov, Eur. Phys. J. C 26, 173 (2002)CrossRefADSGoogle Scholar
  12. 12.
    S.V. Chekanov, V.L. Morgunov, Phys. Rev. D 67, 074011 (2003)CrossRefADSGoogle Scholar
  13. 13.
    G. Corcella, E.K. Irish, M.H. Seymour, HERWIG for top physics at the linear collider, hep-ph/0012319Google Scholar
  14. 14.
    G. Corcella, M.L. Mangano, M.H. Seymour, JHEP 0007, 004 (2000)CrossRefADSGoogle Scholar
  15. 15.
    M. Campanelli, Int. Mod. Phys. A 14, 3277 (1999); R. Strohmer, Int. Mod. Phys. A 18 5127 (2003)CrossRefADSGoogle Scholar
  16. 16.
    M.W. Grunewald et al. , Four-fermion production in electron-positron collisions, The LEP2-MC workshop 1999/2000, hep-ph/0005309Google Scholar
  17. 17.
    W. Beenakker, F.A. Berends, A.P. Chapovsky, Nucl. Phys. B 573, 503 (2000); A.P. Chapovsky, V.A. Khoze, A. Signer, W.J. Stirling, Nucl.Phys. B 621, 257 (2002); M. Beneke, A.P. Chapovsky, A. Signer, G. Zanderighi, Nucl. Phys. B 686, 205 (2004)CrossRefADSGoogle Scholar
  18. 18.
    F. Tkachov, in: Proc. of the 32nd PNPI Winter School on Nuclear and Particle Physics, Ya.I. Azimov et al. (ed.) St.Petersburg, PNPI, 1999, p. 166 [hep-ph/9802307]Google Scholar
  19. 19.
    M.L. Nekrasov, Eur. Phys. J. C 19, 441 (2001); Phys. Lett. B 545, 119 (2002)ADSGoogle Scholar
  20. 20.
    I.I. Bigi, M.A. Shifman, N.G. Uraltsev, A.I. Vainstein, Phys. Rev. D 50, 2234 (1994); M. Beneke, V.M. Braun, Nucl. Phys. B 426, 301 (1994)CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  1. 1.Institute for High-Energy PhysicsProtvinoRussia

Personalised recommendations