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19 April 2024

» arxiv » hep-th/0601058

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Instability in scalar channel of fermion-antifermion scattering amplitude in massless QED_3 and anomalous dimensions of composite operators
Indrajit Mitra ; Raghunath Ratabole ; H. S. Sharatchandra ;
Date:	10 Jan 2006
Subject:	High Energy Physics - Theory; Superconductivity
Abstract:	Instability in the scalar channel of the fermion-antifermion scattering amplitude in massless QED_3 for number of flavours less than the critical value 128/3pi^2 is demonstrated. The anomalous dimensions of gauge-invariant composite operators are determined to O(1/N). Exponentiation of the O(1/N) infrared logarithm is explicitly demonstrated by evaluating the contribution of the ladder diagrams.
Source:	arXiv, hep-th/0601058
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