Jet observables and energy-momentum tensor

Abstract

We clarify and extend the theorem of Sveshnikov and Tkachov [hep-ph/9512370], which gives an explicit connection between jet observables and energy-momentum tensor. We check the relation between jet observables and energy-momentum tensor for non-scalar (spinor and vector) field, give a correct treatment of the light-cone singularity for massless particles, and extend the theorem to the massless case. We also discuss the issue of gauge invariance.

6 pages, LaTex, 1 PostScript figure, epsf.sty; talk at XII International Workshop on QFTHEP'97, 4-10 September, Samara, Russia (to be published in proceeding)

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