most citedStudy of the O(N) linear sigma model at finite temperature using the 2PPI expansion

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Study of the O(N) linear sigma model at finite temperature using the 2PPI expansion

H. Verschelde, J. De Pessemier

We show that a new expansion which sums seagull and bubble graphs to all orders, can be applied to the O(N) linear sigma model at finite temperature. We prove that this expansion c…