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Poincare Invariant Algebra From Instant to Light-Front Quantization

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arxiv hep-ph/0105193 v1 pith:MGYX5RDE submitted 2001-05-18 hep-ph

classification hep-ph
keywords algebraangularinstantlight-frontmomentumconstructedoperatorspoincare
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We present the Poincare algebra interpolating between instant and light-front time quantizations. The angular momentum operators satisfying SU(2) algebra are constructed in an arbitrary interpolation angle and shown to be identical to the ordinary angular momentum and Leutwyler-Stern angular momentum in the instant and light-front quantization limits, respectively. The exchange of the dynamical role between the transverse angular mometum and the boost operators is manifest in our newly constructed algebra.

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