Breakup of hadron masses and the energy-momentum tensor of QCD
Abstract
Hadron masses are shown to be separable in QCD into contributions of quark and gluon kinetic and potential energies, quark masses, and the trace anomaly. The separation is based on a study of the structure of the QCD energy-momentum tensor and its matrix elements in hadron states. The paper contains two parts. In the first part, a detailed discussion of the renormalization properties of the energy-momentum tensor is given. In the second part, a mass separation formula is derived and then applied to the nucleon, pion, and the QCD vacuum. Implications of the results on hadron structure and nonperturbative QCD dynamics are discussed.
- Publication:
-
Physical Review D
- Pub Date:
- July 1995
- DOI:
- 10.1103/PhysRevD.52.271
- arXiv:
- arXiv:hep-ph/9502213
- Bibcode:
- 1995PhRvD..52..271J
- Keywords:
-
- 12.40.Yx;
- 12.38.-t;
- 14.20.Dh;
- 14.40.Aq;
- Hadron mass models and calculations;
- Quantum chromodynamics;
- Protons and neutrons;
- pi K and eta mesons;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory
- E-Print:
- 21 pages, ReVTeX