Proton and neutron electromagnetic radii and magnetic moments from lattice QCD
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866917787145863168 |
|---|---|
| author | Salg, Miguel Djukanovic, Dalibor von Hippel, Georg Meyer, Harvey B. Ottnad, Konstantin Wittig, Hartmut |
| author_facet | Salg, Miguel Djukanovic, Dalibor von Hippel, Georg Meyer, Harvey B. Ottnad, Konstantin Wittig, Hartmut |
| contents | We present results for the electromagnetic form factors of the proton and neutron computed on the $(2 + 1)$-flavor Coordinated Lattice Simulations (CLS) ensembles including both quark-connected and -disconnected contributions. The $Q^2$-, pion-mass, lattice-spacing, and finite-volume dependence of our form factor data is fitted simultaneously to the expressions resulting from covariant chiral perturbation theory including vector mesons amended by models for lattice artefacts. From these fits, we determine the electric and magnetic radii and the magnetic moments of the proton and neutron, as well as the Zemach radius of the proton. To assess the influence of systematic effects, we average over various cuts in the pion mass and the momentum transfer, as well as over different models for the lattice-spacing and finite-volume dependence, using weights derived from the Akaike Information Criterion (AIC). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_09440 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Proton and neutron electromagnetic radii and magnetic moments from lattice QCD Salg, Miguel Djukanovic, Dalibor von Hippel, Georg Meyer, Harvey B. Ottnad, Konstantin Wittig, Hartmut High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory We present results for the electromagnetic form factors of the proton and neutron computed on the $(2 + 1)$-flavor Coordinated Lattice Simulations (CLS) ensembles including both quark-connected and -disconnected contributions. The $Q^2$-, pion-mass, lattice-spacing, and finite-volume dependence of our form factor data is fitted simultaneously to the expressions resulting from covariant chiral perturbation theory including vector mesons amended by models for lattice artefacts. From these fits, we determine the electric and magnetic radii and the magnetic moments of the proton and neutron, as well as the Zemach radius of the proton. To assess the influence of systematic effects, we average over various cuts in the pion mass and the momentum transfer, as well as over different models for the lattice-spacing and finite-volume dependence, using weights derived from the Akaike Information Criterion (AIC). |
| title | Proton and neutron electromagnetic radii and magnetic moments from lattice QCD |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2401.09440 |