Limits on the scale of compositeness from leptonic <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>τ</mi></math></span> decays

J. L. Diaz Cruz; O. A. Sampayo

doi:10.1103/PhysRevD.49.R2149

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Limits on the scale of compositeness from leptonic $τ$ decays

J. L. Diaz Cruz^* and O. A. Sampayo

Departamento de Fisica, Centro de Investigación y de Estudios Avanzados-Instituto Politécnico Nacional, Apartado Postal 14-740, 07000 México, Distrito Federal, Mexico

^*Address after 1994: Instituto de Fisica, U.A. de Puebla, Puebla, Mexico.

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Phys. Rev. D 49, R2149(R) – Published 1 March, 1994

DOI: https://doi.org/10.1103/PhysRevD.49.R2149

Abstract

We study the effects of induced four-fermion contact interactions, which arise when leptons and quarks are considered as composite objects, on the leptonic decays of the $τ$ . The current experimental values on the leptonic $τ$ decays can be used to put limits on the scale of compositeness, which can be as high as $Λ_{e} > 8.1$ TeV and $Λ_{μ} > 6.5$ TeV for the decay modes into an electron and muon, respectively.

References (10)

A. Schwarz, plenary talk at the XVI International Symposium on Lepton-Photon, Cornell University, 1993 (unpublished) E. Fernandez, presented at the EPS meeting, Marseille, 1993 (unpublished)
S. Weinberg, Phys. Rev. Lett. 19, 1264 (1967) A. Salami, in Elementary Particle Theory: Relativistic Groups and Analyticity (Nobel Symposium No. 8), edited by N. Svartholm (Almqvist and Wiksell, Stockholm, 1968), p. 367 S. L. Glashow, Nucl. Phys. 22, 579 (1961)
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A. Pich, CERN Report No. CERN-TH.6237/91, 1991 (unpublished)
W. Marciano and A. Sirlin, Phys. Rev. Lett. 61, 1815 (1992)
[1] ARGUS Collaboration, H. Albrecht et al., Report No. DESY-92-086 (unpublished) ARGUS Collaboration, , Z. Phys. C 53, 367 (1992) BES Collaboration, presented at the APS Spring Meeting, Washington, D.C., 1992 (unpublished)
[1] ARGUS Collaboration, H. Albrecht et al., Phys. Lett. B 246, 278 (1990)
J. L. Diaz-Cruz and O. A. Sampayo, Phys. Lett. B 306, 395 (1993)

[c1] A. Schwarz, plenary talk at the XVI International Symposium on Lepton-Photon, Cornell University, 1993 (unpublished) E. Fernandez, presented at the EPS meeting, Marseille, 1993 (unpublished)

[c2] S. Weinberg, Phys. Rev. Lett. 19, 1264 (1967) A. Salami, in Elementary Particle Theory: Relativistic Groups and Analyticity (Nobel Symposium No. 8), edited by N. Svartholm (Almqvist and Wiksell, Stockholm, 1968), p. 367 S. L. Glashow, Nucl. Phys. 22, 579 (1961)

[c3] M. E. Peskin, in Proceedings of the International Symposium on Lepton and Photon Interactions at High Energies, Kyoto, Japan, 1985, edited by M. Konuma and K. Takahashi (RIPF, Kyoto, 1986), p. 714

[c4] E. Eichten, K. Lane, and M. Peskin, Phys. Rev. Lett. 50, 811 (1980)

[c5] Particle Data Group, K. Hikasa et al., Phys. Rev. D 45, S1 (1992)

[c6] A. Pich, CERN Report No. CERN-TH.6237/91, 1991 (unpublished)

[c7] W. Marciano and A. Sirlin, Phys. Rev. Lett. 61, 1815 (1992)

[c8] [1] ARGUS Collaboration, H. Albrecht et al., Report No. DESY-92-086 (unpublished) ARGUS Collaboration, , Z. Phys. C 53, 367 (1992) BES Collaboration, presented at the APS Spring Meeting, Washington, D.C., 1992 (unpublished)

[c9] [1] ARGUS Collaboration, H. Albrecht et al., Phys. Lett. B 246, 278 (1990)

[c10] J. L. Diaz-Cruz and O. A. Sampayo, Phys. Lett. B 306, 395 (1993)

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Limits on the scale of compositeness from leptonic $τ$ decays

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Limits on the scale of compositeness from leptonic τ decays

Abstract

References (10)

Limits on the scale of compositeness from leptonic $τ$ decays