The chiral color symmetry and g -boson mass limit from new tevatron data on tt production


A gauge model with chiral color symmetry of quarks is considered and possible effects of
the color G -boson octet predicted by this symmetry are investigated. The contributions
of the G -boson to the cross section σtt and to the forward-backward asymmetry App
of tt production at the Tevatron are calculated and analysed in dependence on two free
parameters of the model, the mixing angle θG and G mass mG , in comparision with
the new Tevatron data on App . The G -boson contributions to σtt and App are shown
to be consistent with the Tevatron data on σtt and App , the allowed region in the
consistency is found.

About the authors

Mikhail V Martynov

P. G. Demidov Yaroslavl State University, Faculty of Physics

младший научный сотрудник, каф. теоретической физики (научно-исследовательский сектор); Ярославский государственный университет им. П. Г. Демидова,физический факультет; P. G. Demidov Yaroslavl State University, Faculty of Physics

Alexander D Smirnov

P. G. Demidov Yaroslavl State University, Faculty of Physics

(д.ф.-м.н., проф.), профессор, каф. теоретической физики; Ярославский государственный университет им. П. Г. Демидова,физический факультет; P. G. Demidov Yaroslavl State University, Faculty of Physics


  1. Pati J. C., Salam A. Mirror fermions, J/Ψ particles, Kolar-mine events and neutrino anomaly // Phys. Lett. B, 1975. Vol. 58, no. 13. Pp. 333-337.
  2. Hall L. J., Nelson A. E. Heavy gluons and monojets // Phys. Lett. B, 1985. Vol. 153, no. 6. Pp. 430-432.
  3. Frampton P. H., Glashow S. L. Chiral color: An alternative to the standard model // Phys. Lett. B, 1987. Vol. 190, no. 1-2. Pp. 157-161.
  4. Cuypers F. Asymmetric chiral colour // Z. Phys. C, 1990. Vol. 48, no. 4. Pp. 639-646.
  5. Martynov M. V., Smirnov A. D. Chiral color symmetry and possible G -boson effects at the Tevatron and LHC // Mod. Phys. Lett. A, 2009. Vol. 24, no. 24. Pp. 1897-1905, arXiv: 0906.4525 [hep-ph].
  6. Martynov M. V., Smirnov A. D. On mass limit for chiral color symmetry G -boson from Tevatron data on tt production // Mod. Phys. Lett. A, 2010. Vol. 25, no. 31. Pp. 2637-2643, arXiv: 1006.4246 [hep-ph].
  7. Bagger J., Schmidt C., King S. Axigluon production in hadronic collisions // Phys. Rev. D., 1988. Vol. 37, no. 5. Pp. 1188-1196.
  8. Frederix R., Maltoni F. Top pair invariant mass distribution: a window on new physics // JHEP, 2009. Vol. 2009, no. 01, 047. 32 pp., arXiv: 0712.2355 [hep-ph].
  9. Rodrigo G. Axigluon signatures at hadron colliders / In: 8th International Symposium on Radiative Corrections (Florence, Italy, 1-6 Oct 2007) / PoS RAD COR, 2007. Pp. 010, arXiv: 0803.2992 [hep-ph].
  10. Antunano O., Kuhn J. H., Rodrigo G. Top quarks, axigluons and charge asymmetries at hadron colliders // Phys. Rev. D, 2008. Vol. 77, no. 1, 014003. 8 pp., arXiv: 0709.1652 [hep- ph].
  11. Ferrario P., Rodrigo G. Massive color-octet bosons and the charge asymmetries of top quarks at hadron colliders // Phys. Rev. D, 2008. Vol. 78, no. 9, 094018. 14 pp., arXiv:0809.3354 [hep-ph].
  12. CDF Collaboration Combination of cdf top quark pair production cross section measurements with up to 4.6 fb-1: CDF Note 9913, 2009. 15 pp., cdf9913
  13. CDF Collaboration Measurement of the inclusive forward-backward asymmetry and its rapidity dependence afb(|δy|) of tt production in 5.3/fb of tevatron data: CDF/ANAL/TOP/PUBLIC 10224, 2010. 13 pp., 10224 public v02 for 10185 ttbarAfbDeltay.pdf.
  14. Kidonakis N., Vogt R. The Theoretical top quark cross section at the Tevatron and the LHC // Phys. Rev. D, 2008. Vol. 78, no. 7, 074005. 9 pp., arXiv: 0805.3844 [hep-ph].
  15. Cacciari M., Frixione S., Mangano M. L., Nason P., Ridolfi G. Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC // JHEP, 2008. Vol. 2008, no. 09, 127. 17 pp., arXiv: 0804.2800 [hep-ph].
  16. Kühn J. H., Rodrigo G. Charge asymmetry of heavy quarks at hadron colliders // Phys. Rev. D, 1999. Vol. 59, no. 5, 054017. 9 pp., arXiv: hep-ph/9807420.
  17. Zerwekh A. R. Axigluon couplings in the presence of extra color-octet spin-one fields // Eur. Phys. J. C, 2010. Vol. 65, no. 3-4. Pp. 543-546, arXiv: 0908.3116 [hep-ph].
  18. Frampton P. H., Shu J., Wang K. Axigluon as possible explanation for pp → tt forward- backward asymmetry // Phys. Lett. B, 2010. Vol. 683, no. 4-5. Pp. 294-297, arXiv: 0911.2955 [hep-ph].
  19. Ferrario P., Rodrigo G. Heavy colored resonances in tt + jet at the LHC // JHEP, 2010. Vol. 2010, no. 2, 051, arXiv: 0912.0687 [hep-ph].
  20. Dorsner I., Fajfer S., Kamenik J. F., Kosnik N. Light colored scalars from grand unification and the forward-backward asymmetry in top quark pair production // Phys. Rev. D, 2010. Vol. 81, no. 5, 055009. 11 pp., arXiv: 0912.0972 [hep-ph].
  21. Cheung K., Keung W. Y., Yuan T. C. 287-290 // Phys. Lett. B, 2009. Vol. 682, no. 3, arXiv: 0908.2589 [hep-ph].
  22. Rodrigo G., Ferrario P. Charge asymmetry: a theory appraisal, arXiv: 1007.4328 [hep-ph].
  23. Alekhin S. Parton distributions from deep-inelastic-scattering data // Phys. Rev. D., 2003. Vol. 68, no. 1, 014002. 11 pp., arXiv: hep-ph/0211096.
  24. Melnikov K., Schulze M. NLO QCD corrections to top quark pair production in association with one hard jet at hadron colliders // Nucl. Phys. B, 2010. Vol. 840, no. 1-2. Pp. 129-159, arXiv: 1004.3284 [hep-ph].
  25. Dittmaier S., Uwer P., Weinzierl S. Hadronic top-quark pair production in association with a hard jet at next-to-leading order QCD: Phenomenological studies for the Tevatron and the LHC // Eur. Phys. J. C, 2009. Vol. 59, no. 3. Pp. 625-646, arXiv: 0810.0452 [hep-ph].



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