Production, collection, and utilization of very-long-lived heavy charged leptons

J. L. Goity; W. J. Kossler; Marc Sher

doi:10.1103/PhysRevD.48.5437

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Production, collection, and utilization of very-long-lived heavy charged leptons

J. L. Goity

W. J. Kossler and Marc Sher

Continuous Electron Beam Accelerator Facility, Newport News, Virginia 23606

Department of Physics, College of William and Mary, Williamsburg, Virginia, 23187

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Phys. Rev. D 48, 5437 – Published 1 December, 1993

DOI: https://doi.org/10.1103/PhysRevD.48.5437

Abstract

If a fourth generation of leptons exists, both the neutrino and its charged partner must be heavier than 45 GeV. We suppose that the neutrino is the heavier of the two, and that a global or discrete symmetry prohibits intergenerational mixing. In that case, nonrenormalizable Planck scale interactions will induce a very small mixing; dimension-five interactions will lead to a lifetime for the heavy charged lepton ∼(1–100) yr. Production of such particles is discussed, and it is shown that a few thousand can be produced and collected at a linear collider. The possible uses of these heavy leptons are also briefly discussed.

References (13)

J.R. Carter, in Proceedings of the Joint International Lepton Photon Symposium and Europhysics Conference on High Energy Physics, Geneva, Switzerland, 1991, edited by S. Hegarty, K. Potter, and E. Quercigh (World Scientific, Singapore, 1992), Vol. II, p. 3.
A significant mass splitting between the neutrino and charged lepton would affect electroweak radiative corrections. The major effect would be on the ``T" parameter, which would change by 3( $m_{L}$ sup 2- $m_{N}$ sup 2)/(16 $π^{2}$ $\sin^{2}$ ${theta}_{W}$ $m^{2}$ sub W). It is impossible to bound this quantity without knowing the masses of the top and fourth generation quarks; if the former is 140 GeV and the latter are degenerate, then $m_{N}$ sup 2- $m_{L}$ sup 2 must be less than sim(300 GeV $)^{2}$ , which is a fairly mild constraint on models. The effects on the S and U parameters are only logarithmic in the mass splitting.
M. Sher and Y. Yuan, Phys. Lett. B 285, 336 (1992).
S.W. Hawking, Phys. Lett. B 195, 337 (1987).
L.M. Krauss and F. Wilczek, Phys. Rev. Lett. 62, 1221 (1989).
S. Barr and D. Seckel, Phys. Rev. D 46, 539 (1992).
J. Maalampi and M. Roos, Phys. Rep. 186, 53 (1990).
T. Banks and M. Karliner, Nucl. Phys. B281, 399 (1987).
F. del Aguila and M. Sher, Phys. Lett. B 252, 116 (1990).
A. Soni and R.M. Xu, Phys. Rev. Lett. 69, 33 (1992).
W.H. Breunlich, P. Kammel, J.S. Cohen and M. Leon, Annu. Rev. Nucl. Part. Sci. 39, 311 (1989).
B.L. Ioffe, L.B. Okun, M.A. Shifman and M.B. Voloshin, Acta Phys. Pol. 3, 229 (1981).
G. Zweig, Science 201, 973 (1978).

[c1] J.R. Carter, in Proceedings of the Joint International Lepton Photon Symposium and Europhysics Conference on High Energy Physics, Geneva, Switzerland, 1991, edited by S. Hegarty, K. Potter, and E. Quercigh (World Scientific, Singapore, 1992), Vol. II, p. 3.

[c2] A significant mass splitting between the neutrino and charged lepton would affect electroweak radiative corrections. The major effect would be on the ``T" parameter, which would change by 3( $m_{L}$ sup 2- $m_{N}$ sup 2)/(16 $π^{2}$ $\sin^{2}$ ${theta}_{W}$ $m^{2}$ sub W). It is impossible to bound this quantity without knowing the masses of the top and fourth generation quarks; if the former is 140 GeV and the latter are degenerate, then $m_{N}$ sup 2- $m_{L}$ sup 2 must be less than sim(300 GeV $)^{2}$ , which is a fairly mild constraint on models. The effects on the S and U parameters are only logarithmic in the mass splitting.

[c3] M. Sher and Y. Yuan, Phys. Lett. B 285, 336 (1992).

[c4] S.W. Hawking, Phys. Lett. B 195, 337 (1987).

[c5] L.M. Krauss and F. Wilczek, Phys. Rev. Lett. 62, 1221 (1989).

[c6] S. Barr and D. Seckel, Phys. Rev. D 46, 539 (1992).

[c7] J. Maalampi and M. Roos, Phys. Rep. 186, 53 (1990).

[c8] T. Banks and M. Karliner, Nucl. Phys. B281, 399 (1987).

[c9] F. del Aguila and M. Sher, Phys. Lett. B 252, 116 (1990).

[c10] A. Soni and R.M. Xu, Phys. Rev. Lett. 69, 33 (1992).

[c11] W.H. Breunlich, P. Kammel, J.S. Cohen and M. Leon, Annu. Rev. Nucl. Part. Sci. 39, 311 (1989).

[c12] B.L. Ioffe, L.B. Okun, M.A. Shifman and M.B. Voloshin, Acta Phys. Pol. 3, 229 (1981).

[c13] G. Zweig, Science 201, 973 (1978).

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Production, collection, and utilization of very-long-lived heavy charged leptons

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