期刊
PHYSICAL REVIEW D
卷 62, 期 4, 页码 art. no.-45004出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevD.62.045004
关键词
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The basketball diagram is a three-loop vacuum diagram for a scalar field theory that cannot be expressed in terms of one-loop diagrams. We calculate this diagram for a massive scalar field at nonzero temperature, reducing it to expressions involving three-dimensional integrals that can be easily evaluated numerically. We use this result to calculate the foe energy for a massive scalar field with a phi(4) interaction to three-loop order.
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