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arXiv · 1208.6425

Massless Scalar Degrees of Freedom in QCD and in the Electroweak Sector from the Trace Anomaly

Luigi Delle Rose·Mirko Serino
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Abstract

The interaction of QCD and electroweak sector with gravity is characterized by the generation of a massless pole in a specific form factor present in the 1-loop effective action. We briefly illustrate how to single out this behaviour in perturbation theory, by taking as an example the $TJJ$ vertex, with $T$ denoting the energy momentum tensor of the Standard Model. The breaking of scale invariance, due to the trace anomaly, is then related to the appearance of a local degree of freedom in the effective action, which is of dilaton type.

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Luigi Delle Rose, Mirko Serino. 2012-08-31. Massless Scalar Degrees of Freedom in QCD and in the Electroweak Sector from the Trace Anomaly. https://doi.org/10.1063/1.4763518

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