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Im trying to learn more about different extensions of the standard model.

Are the Left Right Symmetric Extension of the Standard model and the Neutrino Minimal Standard Model different extensions?

I know both add 3 right handed neutrinos. Do these neutrinos differ in any way, also are there other differences between the models.

I know the LR symmetric extension is based on the gauge group SU(2)l x SU(2)r x U(1) b-l.

Is the vMSM based on a gauge group and if so which one?

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# I Left Right Symmetric Extension of SM and vMSM

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