nLab QCD trace anomaly




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theory (physics), model (physics)

experiment, measurement, computable physics

Algebraic Qunantum Field Theory

algebraic quantum field theory (perturbative, on curved spacetimes, homotopical)



field theory:

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quantum mechanical system, quantum probability

free field quantization

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interacting field quantization



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While quantum chromodynamics (QCD) expressed via its Lagrangian density for quark-physics looks clasically like a conformal field theory, a quantum anomaly in the trace of its energy momentum tensor (conformal anomaly) breaks conformal invariance as a quantum field theory. This is called the QCD trace anomaly.

This is relevant in particular for computation of the equation of state of the quark-gluon plasma.



Original articles:

Further discussion:

  • Jens O. Andersen, Lars E. Leganger, Michael Strickland, The QCD trace anomaly, Phys.Rev. D84 (2011) 087703 (arXiv:1106.0514)

In geometric engineering of QCD on branes

Discussion via geometric engineering of QCD on intersecting branes (“holographic QCD”):

  • Jose L. Goity, Roberto C. Trinchero, Holographic models and the QCD trace anomaly, Phys. Rev. D 86, 034033 – 2012 (arXiv:1204.6327)

  • Aalok Misra, Charles Gale, The QCD Trace Anomaly at Strong Coupling from M-Theory (arXiv:1909.04062)

The QCD trace anomaly affects notably the equation of state of the quark-gluon plasma, see there at References – Holographic description of quark-gluon plasma

Created on September 11, 2019 at 06:03:07. See the history of this page for a list of all contributions to it.