Baryonic content of the pion
| Autor: | Wojciech Broniowski, Pablo Sanchez-Puertas, Enrique Ruiz Arriola |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics 010308 nuclear & particles physics QC1-999 High Energy Physics::Phenomenology Nuclear Theory Form factor (quantum field theory) FOS: Physical sciences Constituent quark Down quark Astrophysics::Cosmology and Extragalactic Astrophysics Radius 01 natural sciences Baryon High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Pion Isospin 0103 physical sciences High Energy Physics::Experiment Baryon number Nuclear Experiment 010306 general physics |
| Zdroj: | Digibug. Repositorio Institucional de la Universidad de Granada instname Physics Letters Physics Letters B, Vol 822, Iss, Pp 136680-(2021) |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/j.physletb.2021.136680 |
| Popis: | The baryon form factor of charged pions arises since isospin symmetry is broken. We obtain estimates for this basic property in two phenomenological ways: from simple constituent quark models with unequal up and down quark masses, and from fitting to e+e−→π+π−data. All our methods yield a positive π+baryon mean square radius of (0.03 −0.04fm)2. Hence, a picture emerges where the outer region has a net baryon, and the inner region a net antibaryon density, both compensating each other such that the total baryon number is zero. For π−the effect is opposite. European H2020 MSCA-COFUND 754510,824093,H2020-INFRAIA-2018-1 Polish National Science Centre 2018/31/B/ST2/01022 Generalitat de Catalunya 2017SGR1069 Ministerio de Economía y Competitividad FPA2017-86989-P,SEV-2016-0588 MINECO European Regional Development Fund FIS2017-85053-C2-1-P ERDF Junta de Andalucía FQM-225 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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