Constraining anomalous top quark couplings at the Fermilab Tevatron

D. Atwood; A. Kagan; T. G. Rizzo

doi:10.1103/PhysRevD.52.6264

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Constraining anomalous top quark couplings at the Fermilab Tevatron

D. Atwood, A. Kagan, and T. G. Rizzo

Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309

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Phys. Rev. D 52, 6264 – Published 1 December, 1995

DOI: https://doi.org/10.1103/PhysRevD.52.6264

Abstract

We explore the influence of an anomalous chromomagnetic moment κ on the production characteristics of top quark pairs at the Fermilab Tevatron with a center-of-mass energy of √s =1.8 TeV. We find that for top quarks in the 175 GeV mass range, present measurements are probing values of κ of order 0.25. We discuss a class of technicolor models with techniscalars which may produce such large values of κ in conjunction with the generation of $m_{t}$ . For κ’s in this range we find that significant enhancements in both the qq¯, gg→tt¯ production cross sections are obtained. Once sufficient statistics have been accumulated and QCD uncertainties are under control, future high precision measurements at the Fermilab Tevatron will eventually be sensitive to values of κ with magnitudes smaller than ≃0.1.

References (21)

CDF Collaboration, F. Abe et al., Phys. Rev. Lett. 73, 225 (1994); , Phys. Rev. D 50, 2966 (1994) , ibid. 51, 4623 (1995); , Phys. Rev. Lett. 74, 2626 (1995).
D0 Collaboration, S. Abachi et al., Phys. Rev. Lett. 72, 2138 (1994); , ibid. 74, 2422 (1995); , ibid. 74, 2632 (1995).
D. Schaile, in Proceedings of the 27th International Conference on High Energy Physics, Glasgow, Scotland, 1994, edited by P. J. Bussey and I. G. Knowles (IOP, London, 1995); LEP Collaborations, ibid.
G. Kane, G. A. Ladinsky and C. P. Yuan, Phys. Rev. D 45, 124 (1992); C. P. Yuan, ibid. 45, 782 (1992); D. Atwood, A. Aeppli and A. Soni, Phys. Rev. Lett. 69, 2754 (1992).
M. Peskin, in Proceedings of the Workshop on Physics and Experiments at Linear esup + $e^{-}$ Collider, Waikola, Hawaii, 1993, edited by F. Harris et al. (World Scientific, Singapore, 1994); M. Peskin and C. R. Schmidt, in Physics and Experiments with Linear Colliders, Proceedings of the Workshop, Saariselkä, Finland, 1991, edited by R. Orava (World Scientific, Singapore, 1992); P. Zerwas, ibid.; W. Bernreuther et al., in esup + $e^{-}$ Collisions at 500 GeV: The Physics Potential, Proceedings of the Workshop, Munich Annecy Hamburg,, 1991, edited by P. Zerwas (DESY Report No. 92 123, Hamburg, 1992); A. Djouadi, ibid., p. 108; M. Frigeni and R. Rattazzi, Phys. Lett. B 269, 412 (1991); R. D. Peccei, S. Persis and X. Zhang, Nucl. Phys. B349, 305 (1991); D. O. Carlson, E. Malkawi and C. P. Yuan, Phys. Lett. B 337, 145 (1994).
J. L. Hewett and T. G. Rizzo, Phys. Rev. D 49, 319 (1994).
For the most recent estimate of the top quark production cross section at next to leading order including gluon resummation in QCD, see E. Laenen, J. Smith, and W. L. van Neerven, Phys. Lett. B 321, 254 (1994).
See, for example, C. Hill and S. Parke, Phys. Rev. D 49, 4454 (1994); E. Eichten and K. Lane, Phys. Lett. B 327, 129 (1994); K. Lane, in Proceedings of the 27th International Conference on High Energy Physics [3]; P. Cho and E. Simmons, Phys. Lett. B 323, 401 (1994); T. Appelquist and G. Triantaphyllou, Phys. Rev. Lett. 69, 2750 (1992).
A. L. Kagan, in Particle Physics from Underground to Heaven, Proceedings of the 15th Johns Hopkins Workshop on Current Problems in Particle Theory, Baltimore, Maryland, 1991, edited by G. Domokos and S. Kovesi Domokos (World Scientific, Singapore, 1992).
A. L. Kagan, Phys. Rev. D 51, 6196 (1995); see also A. L. Kagan, to appear in Proceedings of the Fourth International Conference on Physics Beyond the Standard Model, Lake Tahoe, CA, 1994, and references therein.
T. G. Rizzo, Phys. Rev. D 50, 4478 (1994). See also J. L. Hewett and T. G. Rizzo, ibid. 49, 319 (1994).
D. Silverman and G. Shaw, Phys. Rev. D 27, 1196 (1983); J. Reid, M. Samuel, K. A. Milton and T. G. Rizzo, ibid. 30, 245 (1984).
CTEQ Collaboration, J. Botts et al., Phys. Lett. B 304, 159 (1993), now superseded by CTEQ2, J. Botts et al. (unpublished); (private communication).
See D. Atwood, A. Aeppli, and A. Soni in Ref. cite4; also D. Atwood and A. Soni, in The Fermilab Meeting, Proceeding of the Meeting of the Division of Particles and Fields of the APS, Batavia, Illinois, 1992, edited by C. Albright et al. (World Scientific, Singapore, 1993).
A. D. Martin, W. J. Stirling and R. G. Roberts, Phys. Rev. D 50, 6734 (1994).
A. D. Martin, W. J. Stirling, and R. G. Roberts, Rutherford Laboratory Report No. RAL 94 055, 1994 (unpublished). One of the authors (T.G.R.) would like to thank W. J. Stirling for providing him with detailed information on the variation of the t bart production cross section with different choices for the parton densities.
J. Smith (private communication).
CDF Collaboration, D. Amidei, presented at the Lafex International School on High Energy Physics, Rio de Janeiro, Brazil, 1995.
M. Dine, A. Kagan and S. Samuel, Phys. Lett. B 243, 250 (1990).
A. Manohar and H. Georgi, Nucl. Phys. B234, 189 (1984).
R. S. Chivukula, Phys. Rev. Lett. 61, 2657 (1988).

[c1] CDF Collaboration, F. Abe et al., Phys. Rev. Lett. 73, 225 (1994); , Phys. Rev. D 50, 2966 (1994) , ibid. 51, 4623 (1995); , Phys. Rev. Lett. 74, 2626 (1995).

[c2] D0 Collaboration, S. Abachi et al., Phys. Rev. Lett. 72, 2138 (1994); , ibid. 74, 2422 (1995); , ibid. 74, 2632 (1995).

[c3] D. Schaile, in Proceedings of the 27th International Conference on High Energy Physics, Glasgow, Scotland, 1994, edited by P. J. Bussey and I. G. Knowles (IOP, London, 1995); LEP Collaborations, ibid.

[c4] G. Kane, G. A. Ladinsky and C. P. Yuan, Phys. Rev. D 45, 124 (1992); C. P. Yuan, ibid. 45, 782 (1992); D. Atwood, A. Aeppli and A. Soni, Phys. Rev. Lett. 69, 2754 (1992).

[c5] M. Peskin, in Proceedings of the Workshop on Physics and Experiments at Linear esup + $e^{-}$ Collider, Waikola, Hawaii, 1993, edited by F. Harris et al. (World Scientific, Singapore, 1994); M. Peskin and C. R. Schmidt, in Physics and Experiments with Linear Colliders, Proceedings of the Workshop, Saariselkä, Finland, 1991, edited by R. Orava (World Scientific, Singapore, 1992); P. Zerwas, ibid.; W. Bernreuther et al., in esup + $e^{-}$ Collisions at 500 GeV: The Physics Potential, Proceedings of the Workshop, Munich Annecy Hamburg,, 1991, edited by P. Zerwas (DESY Report No. 92 123, Hamburg, 1992); A. Djouadi, ibid., p. 108; M. Frigeni and R. Rattazzi, Phys. Lett. B 269, 412 (1991); R. D. Peccei, S. Persis and X. Zhang, Nucl. Phys. B349, 305 (1991); D. O. Carlson, E. Malkawi and C. P. Yuan, Phys. Lett. B 337, 145 (1994).

[c6] J. L. Hewett and T. G. Rizzo, Phys. Rev. D 49, 319 (1994).

[c7] For the most recent estimate of the top quark production cross section at next to leading order including gluon resummation in QCD, see E. Laenen, J. Smith, and W. L. van Neerven, Phys. Lett. B 321, 254 (1994).

[c8] See, for example, C. Hill and S. Parke, Phys. Rev. D 49, 4454 (1994); E. Eichten and K. Lane, Phys. Lett. B 327, 129 (1994); K. Lane, in Proceedings of the 27th International Conference on High Energy Physics [3]; P. Cho and E. Simmons, Phys. Lett. B 323, 401 (1994); T. Appelquist and G. Triantaphyllou, Phys. Rev. Lett. 69, 2750 (1992).

[c9] A. L. Kagan, in Particle Physics from Underground to Heaven, Proceedings of the 15th Johns Hopkins Workshop on Current Problems in Particle Theory, Baltimore, Maryland, 1991, edited by G. Domokos and S. Kovesi Domokos (World Scientific, Singapore, 1992).

[c10] A. L. Kagan, Phys. Rev. D 51, 6196 (1995); see also A. L. Kagan, to appear in Proceedings of the Fourth International Conference on Physics Beyond the Standard Model, Lake Tahoe, CA, 1994, and references therein.

[c11] T. G. Rizzo, Phys. Rev. D 50, 4478 (1994). See also J. L. Hewett and T. G. Rizzo, ibid. 49, 319 (1994).

[c12] D. Silverman and G. Shaw, Phys. Rev. D 27, 1196 (1983); J. Reid, M. Samuel, K. A. Milton and T. G. Rizzo, ibid. 30, 245 (1984).

[c13] CTEQ Collaboration, J. Botts et al., Phys. Lett. B 304, 159 (1993), now superseded by CTEQ2, J. Botts et al. (unpublished); (private communication).

[c14] See D. Atwood, A. Aeppli, and A. Soni in Ref. cite4; also D. Atwood and A. Soni, in The Fermilab Meeting, Proceeding of the Meeting of the Division of Particles and Fields of the APS, Batavia, Illinois, 1992, edited by C. Albright et al. (World Scientific, Singapore, 1993).

[c15] A. D. Martin, W. J. Stirling and R. G. Roberts, Phys. Rev. D 50, 6734 (1994).

[c16] A. D. Martin, W. J. Stirling, and R. G. Roberts, Rutherford Laboratory Report No. RAL 94 055, 1994 (unpublished). One of the authors (T.G.R.) would like to thank W. J. Stirling for providing him with detailed information on the variation of the t bart production cross section with different choices for the parton densities.

[c17] J. Smith (private communication).

[c18] CDF Collaboration, D. Amidei, presented at the Lafex International School on High Energy Physics, Rio de Janeiro, Brazil, 1995.

[c19] M. Dine, A. Kagan and S. Samuel, Phys. Lett. B 243, 250 (1990).

[c20] A. Manohar and H. Georgi, Nucl. Phys. B234, 189 (1984).

[c21] R. S. Chivukula, Phys. Rev. Lett. 61, 2657 (1988).

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Constraining anomalous top quark couplings at the Fermilab Tevatron

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