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25 April 2024

» arxiv » 1703.4408

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Relations between positivity, localization and degrees of freedom: the Weinberg-Witten theorem and the van Dam-Veltman-Zakharov discontinuity
Jens Mund ; Karl-Henning Rehren ; Bert Schroer ;
Date:	13 Mar 2017
Abstract:	The problem of accounting for the degrees of freedom in passing from massive spin to massless helicity degrees of freedom and its inverse, the "fattening" of massless tensor fields to their massive $s = \|h\|$ counterparts, are solved using "string-localized fields". This approach allows to overcome the Weinberg-Witten impediment against the existence of massless $\|h\|geq 2$ energy-momentum tensors, and to replace the van Dam-Veltman-Zakharov discontinuity concerning, e.g., very light gravitons, by a continuous limit $m o 0$.
Source:	arXiv, 1703.4408
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