Poincare' invariance constraints on non-relativistic effective field theories

Details Poincare' invariance constraints on non-relativistic effective field theories Poincare' invariance constraints on non-relativistic effective field theories

2003-10-06

arxiv.org/abs/hep-ph/0310064v2

Nucl.Phys.Proc.Suppl.133:196-201,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, espcrc2.sty; typo in Eq. (29) corrected. Talk given at QCD03, 2-9 July, Montpellier, France To be published in Nucl.

Scientific paper

10.1016/j.nuclphysbps.2004.04.16

We discuss Poincare' invariance in the context of non-relativistic effective
field theories of QCD. We show, in the cases of the HQET and pNRQCD, that the
algebra of the generators of the Poincare' transformations imposes precise
constraints on the form of the Lagrangian. In the case of the HQET they are the
relations formerly obtained by reparametrization invariance.

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