Pressure of massless hot scalar theory in the boundary effective theory framework

Details Pressure of massless hot scalar theory in the boundary effective theory framework Pressure of massless hot scalar theory in the boundary effective theory framework

2010-09-28

arxiv.org/abs/1009.5682v1

Phys.Rev.D83:085024,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 4 figures

Scientific paper

10.1103/PhysRevD.83.085024

We use the boundary effective theory (BET) approach to thermal field theory in order to calculate the pressure of a system of massless scalar fields with quartic interaction. The method naturally separates the infrared physics, and is essentially non-perturbative. To lowest order, the main ingredient is the solution of the free Euler-Lagrange equation with non-trivial (time) boundary conditions. We derive a resummed pressure, which is in good agreement with recent calculations found in the literature, following a very direct and compact procedure.

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