Abstract
Theoretical and experimental aspects of the study of the e-μ-ε problem in effects of neutral weak currents in colliding e+e− beams in the region of the Z resonance are discussed. Quantities that describe the “degree” of violation of e-μ-τ universality are analyzed. In particular, it is shown that by measuring the spin asymmetry for angles θ∿160° it is possible to determine the degree of violation ofl-e universality Δ=g eA g lV −g eV g lA to an accuracy of up to Δ ∼ 0.01.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 88-91, May, 1989.
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Aliev, T.M., Sultanov, S.F. & Yakh'yaev, R.S. More on the τ-μ-e problem: The process e+e−→l+l− in the region of the z-resonance. Soviet Physics Journal 32, 395–398 (1989). https://doi.org/10.1007/BF00895324
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DOI: https://doi.org/10.1007/BF00895324