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Physics of Atomic Nuclei

, Volume 67, Issue 2, pp 296–305 | Cite as

Investigation of the Hττ and Hbb coupling constants for a scalar (pseudoscalar) Higgs boson at a future linear electron-positron collider

  • V. V. Braguta
  • A. A. Likhoded
  • A. E. Chalov
  • R. Rosenfeld
Elementary Particles and Fields Theory
  • 32 Downloads

Abstract

The possibility of setting constraints on the couplings of a scalar (pseudoscalar) Higgs boson to the tau lepton and the b quark in the reactions \(e^ + e^ - \to \nu \bar \nu \tau ^ + \tau ^ - \) and \(e^ + e^ - \to \nu \bar \nu b\bar b\) at a future linear electron-positron collider of total energy \(\sqrt s = 500 GeV\) is studied. The admixture of a new hypothetical pseudoscalar state of the Higgs boson in the H ff vertex is parametrized in the form (m f /ν)(a+5b). On the basis of an analysis of differential distributions for the processes under study, it is shown that data from the future linear collider TESLA will make it possible to constrain the parameters a and b as −0.32≤Δa≤0.24 and −0.73≤b≤0.73 in the case of the reaction \(e^ + e^ - \to \nu \bar \nu \tau ^ + \tau ^ - \) and as −0.026≤Δa≤0.027 and −0.23≤b≤0.23 in the case of the reaction \(e^ + e^ - \to \nu \bar \nu b\bar b\). It is emphasized that the contribution of the fusion subprocess WWH in the channel involving an electron neutrino is of particular importance, since this contribution enhances the sensitivity of data to the parameters being analyzed.

Keywords

Total Energy Elementary Particle Higgs Boson Differential Distribution Linear Collider 
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.
    C. T. Hill and E. H. Simmons, hep-ph/0203079, and references therein.Google Scholar
  2. 2.
    J. R. Dell'Aquila and C. A. Nelson, Nucl. Phys. B 320, 61, 86 (1989).ADSGoogle Scholar
  3. 3.
    B. K. Bullock, K. Hagiwara, and Alan D. Martin, Phys. Lett. B 273, 501 (1991); Nucl. Phys. B 395, 499 (1993).ADSGoogle Scholar
  4. 4.
    (a) B. Grzadkowski and J. F. Gunion, Phys. Lett. B 294, 361 (1992); (b) M. Krämer, J. Kühn, M. L. Stong, and P. M. Zerwas, Z. Phys. C 64, 21 (1994); J. F. Gunion and J. G. Kelly, Phys. Lett. B 333, 110 (1994).ADSGoogle Scholar
  5. 5.
    K. Hagiwara and M. L. Stong, Z. Phys. C 62, 99 (1994); D. J. Miller, S. Y. Choi, B. Eberle, et al., Phys. Lett. B 505, 149 (2001); V. Barger, K. Cheung, A. Djouadi, et al., Phys. Rev. D 49, 79 (1994); K. Hagiwara, S. Ishihara, J. Kamoshita, and B. A. Kniehl, Eur. Phys. J. C 14, 457 (2000); T. Han and J. Jiang, Phys. Rev. D 63, 096007 (2001).CrossRefGoogle Scholar
  6. 6.
    T. Plehn, D. Rainwater, and D. Zeppenfeld, Phys. Rev. Lett. 88, 051801 (2002).Google Scholar
  7. 7.
    J. F. Gunion and J. Pliszka, Phys. Lett. B 444, 136 (1998).ADSGoogle Scholar
  8. 8.
    J. F. Gunion, B. Grzadkowski, and X.-G. He, Phys. Rev. Lett. 77, 5172 (1996).CrossRefADSGoogle Scholar
  9. 9.
    D. Atwood and A. Soni, Phys. Rev. Rev. D 52, 6271 (1995); V. D. Barger, M. S. Berger, J. F. Gunion, and T. Han, Phys. Rep. 286, 1 (1997); V. D. Barger, T. Han, and C.-G. Zhou, Phys. Lett. B 480, 140 (2000); B. Grzadkowski, J. F. Gunion, and J. Pliszka, Nucl. Phys. B 583, 49 (2000).ADSGoogle Scholar
  10. 10.
    R.-D. Heuer et al., hep-ph/0106315.Google Scholar
  11. 11.
    G. Bower, Talk Presented at the Linear Collider Workshop, Chicago, January 7–9, 2002.Google Scholar
  12. 12.
    B. Grzadkowski and J. F. Gunion, Phys. Lett. B 350, 218 (1995); B. Grzadkowski, J. F. Gunion, and J. Kalinowski, Phys. Rev. D 60, 075011 (1999).ADSGoogle Scholar
  13. 13.
    M. Pohl and H. J. Schreiber, Report DESY 99-030.Google Scholar
  14. 14.
    V. Braguta, A. Chalov, and A. Likhoded, Phys. Rev. D 65, 054038 (2002).Google Scholar
  15. 15.
    V. Braguta, A. Chalov, A. Likhoded, and R. Rosenfeld, hep-ph/0208133.Google Scholar
  16. 16.
    K. Desch and N. Meyer, LC Notes, LC-PHSM-2001-025 (http://www.desy.de/lcnotes/2001/025/ww-fus.ps.gz).
  17. 17.
    T. Pierzchala, E. Richter-Was, Z. Was, and M. Worek, Acta Phys. Polon. B 32, 1277 (2001).ADSGoogle Scholar
  18. 18.
    Z. Was and M. Worek, hep-ph/0202007.Google Scholar
  19. 19.
    G. R. Bower et al., hep-ph/0204292.Google Scholar
  20. 20.
    DELPHI Collab., Nucl. Phys. B (Proc. Suppl.) 98, 191 (2001).Google Scholar
  21. 21.
    A. Chalov, A. Likhoded, and R. Rosenfeld, hep-ph/0205146.Google Scholar

Copyright information

© MAIK "Nauka/Interperiodica" 2004

Authors and Affiliations

  • V. V. Braguta
    • 1
  • A. A. Likhoded
    • 1
    • 2
  • A. E. Chalov
    • 1
  • R. Rosenfeld
    • 2
  1. 1.Institutefor High Energy PhysicsProtvino, Moscow oblastRussia
  2. 2.Instituto de Física TeóricaUniv. Estadual Paulista (UN-ESP)São PauloBrazil

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