Phys. Rev. D 53, 882–890 (1996)Gravitational polarization tensor of thermal λφ4 theoryReceived 19 July 1995; published in the issue dated 15 January 1996 The low-momentum structure of the gravitational polarization tensor of an ultrarelativistic plasma of scalar particles with λφ4 interactions is evaluated in a two-loop calculation up to and including order λ3/2. This turns out to require an improved perturbation theory which resums a local thermal mass term as well as nonlocal hard-thermal-loop vertices of scalar and gravitational fields. © 1996 The American Physical Society. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.53.882
DOI:
10.1103/PhysRevD.53.882
PACS:
11.10.Wx, 04.62.+v, 52.60.+h
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