2017/06/30 by Cédric Lorcé · 125 citations
Earth and Planetary Sciences · Physics and Astronomy · #Anomaly (physics) #Hadron #High-Energy Particle Collisions Research #High-pressure geophysics and materials #Nucleon #Particle physics #Physics #Quantum #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quark–gluon plasma #Semiclassical physics #hep-lat #hep-ph #nucl-th
paper · pdf · doi:10.1140/epjc/s10052-018-5561-2
published in The European Physical Journal C 78(2) (Springer Science+Business Media) · 21 pages, 4 figures
openalex created_date 2017/06/30 · arxiv created 2017/12/11 · openalex publication_date 2018/02/01 · arxiv updated 2018/04/04 · openalex updated_date 2026/08/05
We argue that the standard decompositions of the hadron mass overlook pressure effects, and hence should be interpreted with great care. Based on the semiclassical picture, we propose a new decomposition that properly accounts for these pressure effects. Because of Lorentz covariance, we stress that the hadron mass decomposition automatically comes along with a stability constraint, which we discuss for the first time. We show also that if a hadron is seen as made of quarks and gluons, one cannot decompose its mass into more than two contributions without running into trouble with the consistency of the physical interpretation. In particular, the so-called quark mass and trace anomaly contributions appear to be purely conventional. Based on the current phenomenological values, we find that in average quarks exert a repulsive force inside nucleons, balanced exactly by the gluon attractive force.