/ 93 02 04 5 v 1 9 F eb 1 99 3 Poincare invariance in temporal gauge canonical quantization and θ - vacua
نویسنده
چکیده
The Poincare invariance in the temporal gauge canonical quantization of QCD is shown manifestly by verifying the energy-momentumvector and angular-momentum-tensor satisfy the Poincare algebra in the physical Hilbert space. Two different values of θ for the θ-term in QCD lagrangian lead to different representations of the Poincare group, which are, however, connected by an unitary transformation. Thus the parameter θ becomes physically irrelevant unless we can further restrict the physical Hilbert space. 1
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