High Energy Physics - Phenomenology
[Submitted on 28 Feb 2015 (v1), last revised 25 May 2015 (this version, v2)]
Title:How important is $iε$ in QFT?
View PDFAbstract:We discuss the role of $i\epsilon$ in quantum field theories and suggest that it can be identified with the dimensional regularization parameter $i\epsilon=4-d$ thus clarifying and simplifying issues related to the infrared divergences without altering any of the present knowledge in QFT. We further present the relevance of this assumption for the optical theorem.
Submission history
From: Renata Jora [view email][v1] Sat, 28 Feb 2015 08:59:07 UTC (93 KB)
[v2] Mon, 25 May 2015 11:54:42 UTC (93 KB)
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