Holographic QCD and the muon anomalous magnetic moment

Abstract We review the recent progress made in using holographic QCD to study hadronic contributions to the anomalous magnetic moment of the muon, in particular the hadronic light-by-light scattering contribution, where the short-distance constraints associated with the axial anomaly are notoriously...

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Autores principales:	Josef Leutgeb, Jonas Mager, Anton Rebhan
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/47d0b62ea8e64cfaabf3e7352bc997ff
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spelling	oai:doaj.org-article:47d0b62ea8e64cfaabf3e7352bc997ff2021-11-21T12:09:44ZHolographic QCD and the muon anomalous magnetic moment10.1140/epjc/s10052-021-09780-81434-60441434-6052https://doaj.org/article/47d0b62ea8e64cfaabf3e7352bc997ff2021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09780-8https://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract We review the recent progress made in using holographic QCD to study hadronic contributions to the anomalous magnetic moment of the muon, in particular the hadronic light-by-light scattering contribution, where the short-distance constraints associated with the axial anomaly are notoriously difficult to satisfy in hadronic models. This requires the summation of an infinite tower of axial vector mesons, which is naturally present in holographic QCD models, and indeed takes care of the longitudinal short-distance constraint due to Melnikov and Vainshtein. Numerically the results of simple hard-wall holographic QCD models point to larger contributions from axial vector mesons than assumed previously, while the predicted contributions from pseudo-Goldstone bosons agree nicely with data-driven approaches.Josef LeutgebJonas MagerAnton RebhanSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Josef Leutgeb Jonas Mager Anton Rebhan Holographic QCD and the muon anomalous magnetic moment
description	Abstract We review the recent progress made in using holographic QCD to study hadronic contributions to the anomalous magnetic moment of the muon, in particular the hadronic light-by-light scattering contribution, where the short-distance constraints associated with the axial anomaly are notoriously difficult to satisfy in hadronic models. This requires the summation of an infinite tower of axial vector mesons, which is naturally present in holographic QCD models, and indeed takes care of the longitudinal short-distance constraint due to Melnikov and Vainshtein. Numerically the results of simple hard-wall holographic QCD models point to larger contributions from axial vector mesons than assumed previously, while the predicted contributions from pseudo-Goldstone bosons agree nicely with data-driven approaches.
format	article
author	Josef Leutgeb Jonas Mager Anton Rebhan
author_facet	Josef Leutgeb Jonas Mager Anton Rebhan
author_sort	Josef Leutgeb
title	Holographic QCD and the muon anomalous magnetic moment
title_short	Holographic QCD and the muon anomalous magnetic moment
title_full	Holographic QCD and the muon anomalous magnetic moment
title_fullStr	Holographic QCD and the muon anomalous magnetic moment
title_full_unstemmed	Holographic QCD and the muon anomalous magnetic moment
title_sort	holographic qcd and the muon anomalous magnetic moment
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/47d0b62ea8e64cfaabf3e7352bc997ff
work_keys_str_mv	AT josefleutgeb holographicqcdandthemuonanomalousmagneticmoment AT jonasmager holographicqcdandthemuonanomalousmagneticmoment AT antonrebhan holographicqcdandthemuonanomalousmagneticmoment
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Holographic QCD and the muon anomalous magnetic moment

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