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Pion and Kaon Structure at the Electron-Ion Collider / Aguilar, Arlene C. (Campinas State U.) ; Ahmed, Zafir (Regina U.) ; Aidala, Christine (Michigan U.) ; Ali, Salina (Catholic U.) ; Andrieux, Vincent (Illinois U., Urbana (main) ; CERN) ; Arrington, John (Argonne (main)) ; Bashir, Adnan (IFM-UMSNH, Michoacan) ; Berdnikov, Vladimir (Catholic U.) ; Binosi, Daniele (ECT, Trento ; Fond. Bruno Kessler, Trento) ; Chang, Lei (Nankai U.) et al.
Understanding the origin and dynamics of hadron structure and in turn that of atomic nuclei is a central goal of nuclear physics. This challenge entails the questions of how does the roughly 1 GeV mass-scale that characterizes atomic nuclei appear; why does it have the observed value; and, enigmatically, why are the composite Nambu-Goldstone (NG) bosons in quantum chromodynamics (QCD) abnormally light in comparison? In this perspective, we provide an analysis of the mass budget of the pion and proton in QCD; discuss the special role of the kaon, which lies near the boundary between dominance of strong and Higgs mass-generation mechanisms; and explain the need for a coherent effort in QCD phenomenology and continuum calculations, in exa-scale computing as provided by lattice QCD, and in experiments to make progress in understanding the origins of hadron masses and the distribution of that mass within them. [...]
arXiv:1907.08218; NJU-INP 001/19.- 2019-10-31 - 16 p. - Published in : Eur. Phys. J. A 55 (2019) 190 Fulltext: PDF;

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