At the heart of baryonic matter the ARBUZ model favored by recent hadron form factor data
| Autor: | Tomasi-Gustafsson, Egle, Pacetti, Simone |
|---|---|
| Přispěvatelé: | Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Nuclear Theory
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] scattering FOS: Physical sciences p: form factor: electric Nuclear Theory (nucl-th) p: form factor: electromagnetic quark High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) annihilation diquark [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] matter: hadronic structure hadron: form factor Nuclear Experiment baryon: size |
| Popis: | Data on electromagnetic form factors of proton, neutron, and $\Lambda$ from annihilation and scattering reactions are collected and interpreted in the frame of a generalized picture of the internal structure of baryons which holds in space-like and time-like regions. It is shown that these data give an insight of the space structure of the baryon for distances one hundred times smaller than the baryon size and, in the time-like region, a vision of the time evolution of the hadronic matter for times up to $10^{-25}$~s, that is two orders of magnitude shorter than the time taken by the light to cross the volume of a proton. In the proposed interpretation, the electric form factor of the proton in the space-like region can not cross zero, but vanishes or stays very small, as an extrapolation of the data seems to show. In the time-like region specific structures appearing in the data give evidence of the dominance of the quark-diquark structure in a specific range of time of the evolution of the system. Comment: 9 figures 21 pages |
| Databáze: | OpenAIRE |
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