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| Natura: | Preprint |
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2024
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| Accesso online: | https://arxiv.org/abs/2403.10641 |
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| _version_ | 1866914843149205504 |
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| author | Fraga, Eduardo S. Palhares, Leticia F. Villavicencio, Cristian |
| author_facet | Fraga, Eduardo S. Palhares, Leticia F. Villavicencio, Cristian |
| contents | We compute the one-loop QCD correction to the photon-quark-antiquark vertex in an extremely strong magnetic background, i.e., one in which $\sqrt{eB}$ is much larger than all other mass scales. We resort to the lowest-Landau level approximation, and consider on shell fermions. We find that the total magnetic moment is such that the anomalous magnetic moment contributes to the electric part $\sim iE_3σ_3$, the other contributions to $\boldsymbol{B}\cdot\boldsymbolσ$ and $i\boldsymbol{E}\cdot\boldsymbolσ_\perp$ being completely suppressed. We show results for the anomalous magnetic moment of quarks up and down, scaled by their values in the vacuum, as a function of the external magnetic field, considering dressed gluons and a renormalization scale $μ_\mathrm{\tiny \overline{ MS}}=\sqrt{|eB|}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_10641 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quark anomalous magnetic moment in an extreme magnetic background from perturbative QCD Fraga, Eduardo S. Palhares, Leticia F. Villavicencio, Cristian High Energy Physics - Phenomenology Nuclear Theory We compute the one-loop QCD correction to the photon-quark-antiquark vertex in an extremely strong magnetic background, i.e., one in which $\sqrt{eB}$ is much larger than all other mass scales. We resort to the lowest-Landau level approximation, and consider on shell fermions. We find that the total magnetic moment is such that the anomalous magnetic moment contributes to the electric part $\sim iE_3σ_3$, the other contributions to $\boldsymbol{B}\cdot\boldsymbolσ$ and $i\boldsymbol{E}\cdot\boldsymbolσ_\perp$ being completely suppressed. We show results for the anomalous magnetic moment of quarks up and down, scaled by their values in the vacuum, as a function of the external magnetic field, considering dressed gluons and a renormalization scale $μ_\mathrm{\tiny \overline{ MS}}=\sqrt{|eB|}$. |
| title | Quark anomalous magnetic moment in an extreme magnetic background from perturbative QCD |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2403.10641 |