Theory with a unique thermal effective potential
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American Physical Soc
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Acesso aberto
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Abstract
We show that for the pion-nucleon theory the thermal bubble graph is analytic at the origin of the momentum-frequency space, although the internal propagators in the loop have the same mass. This means that, for this theory, the thermal effective potential is uniquely defined. We then examine how a slight modification of the interaction term results in a theory for which the thermal bubble graph displays the usual nonanalyticity at the origin and the thermal effective potential is not uniquely defined.
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English
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Physical Review D. College Pk: American Physical Soc, v. 65, n. 8, 7 p., 2002.
