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Neutral currents; gauge models; SU(2)_L ⊗ SU(2)_R ⊗ U(1); neutrino; parity-violation

We analyse all the neutral-current phenomena following from the general class of gauge models based on the group SU(2)_L ⊗ SU(2)_R ⊗ U(1). It is found that the neutral-current couplings in these models bear a remarkable similarity to those in the standard Weinberg-Salam gauge model. The parameter which plays the role of sin²ϑ_w is found to lie between 0 and 1/2. Comparison with experimental data shows that even a model with the ratio of the masses of the twoZ bosons as small as 1.9 is not ruled out.

Jatinder K Bajaj¹ G Rajasekaran¹

1. Department of Theoretical Physics, University of Madras, Madras - 600 025

Published

April 1979

Manuscript received

10 January 1979