nLab
QCD trace anomaly

Contents

Context

Physics

physics, mathematical physics, philosophy of physics

Surveys, textbooks and lecture notes


theory (physics), model (physics)

experiment, measurement, computable physics

Algebraic Qunantum Field Theory

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

Introduction

Concepts

field theory:

Lagrangian field theory

quantization

quantum mechanical system, quantum probability

free field quantization

gauge theories

interacting field quantization

renormalization

Theorems

States and observables

Operator algebra

Local QFT

Perturbative QFT

Contents

Idea

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.

References

General

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 02:03:07. See the history of this page for a list of all contributions to it.