Energy-momentum tensor in QCD: nucleon mass decomposition and mechanical equilibrium - Archive ouverte HAL
Article Dans Une Revue Journal of High Energy Physics Année : 2021

Energy-momentum tensor in QCD: nucleon mass decomposition and mechanical equilibrium

Cédric Lorcé
Andreas Metz
  • Fonction : Auteur
Barbara Pasquini
  • Fonction : Auteur
Simone Rodini
  • Fonction : Auteur

Résumé

We review and examine in detail recent developments regarding the question of the nucleon mass decomposition. We discuss in particular the virial theorem in quantum field theory and its implications for the nucleon mass decomposition and mechanical equilibrium. We reconsider the renormalization of the QCD energy-momentum tensor in minimal-subtraction-type schemes and the physical interpretation of its components, as well as the role played by the trace anomaly and Poincaré symmetry. We also study the concept of “quantum anomalous energy” proposed in some works as a new contribution to the nucleon mass. Examining the various arguments, we conclude that the quantum anomalous energy is not a genuine contribution to the mass sum rule, as a consequence of translation symmetry.

Dates et versions

hal-03376414 , version 1 (13-10-2021)

Identifiants

Citer

Cédric Lorcé, Andreas Metz, Barbara Pasquini, Simone Rodini. Energy-momentum tensor in QCD: nucleon mass decomposition and mechanical equilibrium. Journal of High Energy Physics, 2021, 11, pp.121. ⟨10.1007/JHEP11(2021)121⟩. ⟨hal-03376414⟩
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