Quark anomalous magnetic moment in an extreme magnetic background from perturbative QCD
We compute the one-loop QCD correction to the photon-quark-antiquark vertex in an extremely strong magnetic background, i.e., one in which e B 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 magneti...
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| Veröffentlicht in: | Physical review. D 2024-06, Vol.109 (11), Article 116018 |
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| creator | Fraga, Eduardo S. Palhares, Leticia F. Villavicencio, Cristian |
| description | We compute the one-loop QCD correction to the photon-quark-antiquark vertex in an extremely strong magnetic background, i.e., one in which
e
B
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
∼
i
E
3
σ
3
, the other contributions to
B
·
σ
and
i
E
·
σ
⊥
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
MS
¯
=
|
e
B
|
. |
| doi_str_mv | 10.1103/PhysRevD.109.116018 |
| format | Article |
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e
B
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
∼
i
E
3
σ
3
, the other contributions to
B
·
σ
and
i
E
·
σ
⊥
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
MS
¯
=
|
e
B
|
.</description><identifier>ISSN: 2470-0010</identifier><identifier>EISSN: 2470-0029</identifier><identifier>DOI: 10.1103/PhysRevD.109.116018</identifier><language>eng</language><ispartof>Physical review. D, 2024-06, Vol.109 (11), Article 116018</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c244t-fc9bfaf0c4391ccd0ab7e1ceda5b67e6b3b0a409ccc4b2da0ef72565cf5c6b893</cites><orcidid>0000-0003-3290-8358 ; 0000-0001-5340-156X ; 0000-0003-3088-396X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,2863,2864,27901,27902</link.rule.ids></links><search><creatorcontrib>Fraga, Eduardo S.</creatorcontrib><creatorcontrib>Palhares, Leticia F.</creatorcontrib><creatorcontrib>Villavicencio, Cristian</creatorcontrib><title>Quark anomalous magnetic moment in an extreme magnetic background from perturbative QCD</title><title>Physical review. D</title><description>We compute the one-loop QCD correction to the photon-quark-antiquark vertex in an extremely strong magnetic background, i.e., one in which
e
B
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
∼
i
E
3
σ
3
, the other contributions to
B
·
σ
and
i
E
·
σ
⊥
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
MS
¯
=
|
e
B
|
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e
B
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
∼
i
E
3
σ
3
, the other contributions to
B
·
σ
and
i
E
·
σ
⊥
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
MS
¯
=
|
e
B
|
.</abstract><doi>10.1103/PhysRevD.109.116018</doi><orcidid>https://orcid.org/0000-0003-3290-8358</orcidid><orcidid>https://orcid.org/0000-0001-5340-156X</orcidid><orcidid>https://orcid.org/0000-0003-3088-396X</orcidid><oa>free_for_read</oa></addata></record> |
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| source | American Physical Society Journals |
| title | Quark anomalous magnetic moment in an extreme magnetic background from perturbative QCD |
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