Advertisement

Search for anomalous top–gluon couplings at LHC revisited

  • Zenrō Hioki
  • Kazumasa OhkumaEmail author
Regular Article - Theoretical Physics

Abstract

Through top-quark pair productions at LHC, we study possible effects of nonstandard top–gluon couplings yielded by SU(3)×SU(2)×U(1) invariant dimension-6 effective operators. We calculate the total cross section and also some distributions for \(pp\to t\bar{t}X\) as functions of two anomalous-coupling parameters, i.e., the chromoelectric and chromomagnetic moments of the top, which are constrained by the total cross section \(\sigma(p\bar{p}\to t\bar{t}X)\) measured at Tevatron. We find that LHC might give us some chances to observe sizable effects induced by those new couplings.

PACS

12.38.-t 12.38.Bx 12.38.Qk 12.60.-i 14.65.Ha 14.70.Dj 

References

  1. 1.
  2. 2.
    W. Buchmüller, D. Wyler, Nucl. Phys. B 268, 621 (1986) CrossRefADSGoogle Scholar
  3. 3.
    C. Arzt, M.B. Einhorn, J. Wudka, Nucl. Phys. B 433, 41 (1995). hep-ph/9405214 CrossRefADSGoogle Scholar
  4. 4.
    B. Grzadkowski, Z. Hioki, K. Ohkuma, J. Wudka, Nucl. Phys. B 689, 108 (2004). hep-ph/0310159 zbMATHCrossRefADSGoogle Scholar
  5. 5.
    J.A. Aguilar-Saavedra, Nucl. Phys. B 812, 181 (2009). arXiv:0811.3842 [hep-ph] CrossRefADSGoogle Scholar
  6. 6.
    J.A. Aguilar-Saavedra, Nucl. Phys. B 821, 215 (2009). arXiv:0904.2387 [hep-ph] CrossRefADSGoogle Scholar
  7. 7.
    CDF collaboration, http://www-cdf.fnal.gov/
  8. 8.
    D0 collaboration, http://www-d0.fnal.gov/
  9. 9.
    P. Haberl, O. Nachtmann, A. Wilch, Phys. Rev. D 53, 4875 (1996). hep-ph/9505409 CrossRefADSGoogle Scholar
  10. 10.
    D. Atwood, A. Aeppli, A. Soni, Phys. Rev. Lett. 69, 2754 (1992) CrossRefADSGoogle Scholar
  11. 11.
    A. Brandenburg, J.P. Ma, Phys. Lett. B 298, 211 (1993) CrossRefADSGoogle Scholar
  12. 12.
    D. Atwood, A. Kagan, T.G. Rizzo, Phys. Rev. D 52, 6264 (1995). hep-ph/9407408 CrossRefADSGoogle Scholar
  13. 13.
    K. Cheung, Phys. Rev. D 53, 3604 (1996). hep-ph/9511260 CrossRefADSGoogle Scholar
  14. 14.
    D. Silverman, Phys. Rev. D 54, 5563 (1996). hep-ph/9605318 CrossRefADSGoogle Scholar
  15. 15.
    K. Whisnant, J.M. Yang, B.L. Young, X. Zhang, Phys. Rev. D 56, 467 (1997). hep-ph/9702305 CrossRefADSGoogle Scholar
  16. 16.
    J.M. Yang, B.L. Young, Phys. Rev. D 56, 5907 (1997). hep-ph/9703463 CrossRefADSGoogle Scholar
  17. 17.
    S.Y. Choi, C.S. Kim, J. Lee, Phys. Lett. B 415, 67 (1997). hep-ph/9706379 CrossRefADSGoogle Scholar
  18. 18.
    B. Grzadkowski, B. Lampe, K.J. Abraham, Phys. Lett. B 415, 193 (1997). hep-ph/9706489 CrossRefADSGoogle Scholar
  19. 19.
    B. Lampe, Phys. Lett. B 415, 63 (1997). hep-ph/9709493 CrossRefADSGoogle Scholar
  20. 20.
    K.I. Hikasa, K. Whisnant, J.M. Yang, B.L. Young, Phys. Rev. D 58, 114003 (1998). hep-ph/9806401 CrossRefADSGoogle Scholar
  21. 21.
    H.Y. Zhou, Phys. Rev. D 58, 114002 (1998). hep-ph/9805358 CrossRefADSGoogle Scholar
  22. 22.
    J. Sjolin, J. Phys. G 29, 543 (2003) CrossRefADSGoogle Scholar
  23. 23.
    O. Antipin, G. Valencia, Phys. Rev. D 79, 013013 (2009). arXiv:0807.1295 [hep-ph] CrossRefADSGoogle Scholar
  24. 24.
    S.K. Gupta, A.S. Mete, G. Valencia, Phys. Rev. D 80, 034013 (2009). arXiv:0905.1074 [hep-ph] CrossRefADSGoogle Scholar
  25. 25.
    D. Atwood, S. Bar-Shalom, G. Eilam, A. Soni, Phys. Rep. 347, 1 (2001). hep-ph/0006032 CrossRefADSGoogle Scholar
  26. 26.
    J.A.M. Vermaseren, Symbolic Manipulation with FORM, Version 2, Tutorial and Reference Manual (CAN, Amsterdam, 1991). ISBN 90-74116-01-9 Google Scholar
  27. 27.
    M. Glück, J.F. Owens, E. Reya, Phys. Rev. D 17, 2324 (1978) CrossRefADSGoogle Scholar
  28. 28.
    B.L. Combridge, Nucl. Phys. B 151, 429 (1979) CrossRefADSGoogle Scholar
  29. 29.
    CDF collaboration, Public CDF note 9448. http://www-cdf.fnal.gov/physics/new/top/public_xsection.html
  30. 30.
    V.M. Abazov et al. (D0 Collaboration), Phys. Rev. D 80, 071102 (2009). arXiv:0903.5525 [hep-ex] CrossRefGoogle Scholar
  31. 31.
    N. Kidonakis, R. Vogt, Phys. Rev. D 78, 074005 (2008). arXiv:0805.3844 [hep-ph] CrossRefADSGoogle Scholar
  32. 32.
    S. Moch, P. Uwer, Phys. Rev. D 78, 034003 (2008). arXiv:0804.1476 [hep-ph] CrossRefADSGoogle Scholar
  33. 33.
    M. Cacciari, S. Frixione, M.L. Mangano, P. Nason, G. Ridolfi, J. High Energy Phys. 0809, 127 (2008). arXiv:0804.2800 [hep-ph] CrossRefADSGoogle Scholar
  34. 34.
    P.M. Nadolsky et al., Phys. Rev. D 78, 013004 (2008). arXiv:0802.0007 [hep-ph] CrossRefADSGoogle Scholar
  35. 35.
    Tevatron Electroweak Working Group for the CDF and D0 Collaborations, arXiv:0808.1089 [hep-ex]
  36. 36.
    W. Beenakker, W.L. van Neerven, R. Meng, G.A. Schuler, J. Smith, Nucl. Phys. B 351, 507 (1991) CrossRefADSGoogle Scholar
  37. 37.
    B. Lillie, J. Shu, T.M.P. Tait, J. High Energy Phys. 0804, 087 (2008). arXiv:0712.3057 [hep-ph] CrossRefADSGoogle Scholar
  38. 38.
    K. Kumar, T.M.P. Tait, R. Vega-Morales, J. High Energy Phys. 0905, 022 (2009). arXiv:0901.3808 [hep-ph] CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag / Società Italiana di Fisica 2009

Authors and Affiliations

  1. 1.Institute of Theoretical PhysicsUniversity of TokushimaTokushimaJapan
  2. 2.Department of Information ScienceFukui University of TechnologyFukuiJapan

Personalised recommendations