Gutenberg Open Science: The charm-quark contribution to light-by-light scattering in the muon (g − 2) from lattice QCD

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-8919

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DC Field	Value	Language
dc.contributor.author	Chao, En-Hung	-
dc.contributor.author	Hudspith, Renwick J.	-
dc.contributor.author	Gérardin, Antoine	-
dc.contributor.author	Green, Jeremy R.	-
dc.contributor.author	Meyer, Harvey B.	-
dc.date.accessioned	2023-04-17T08:50:23Z	-
dc.date.available	2023-04-17T08:50:23Z	-
dc.date.issued	2022	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/8935	-
dc.description.abstract	We compute the hadronic light-by-light scattering contribution to the muon g−2 from the charm quark using lattice QCD. The calculation is performed on ensembles generated with dynamical(u, d,s) quarks at the SU(3)f symmetric point with degenerate pion and kaon masses of around 415 MeV. It includes the connected charm contribution, as well as the leading disconnected Wick contraction, involving the correlation between a charm and a light-quark loop. Cutoff effects turn out to be sizeable, which leads us to use lighter-than-physical charm masses, to employ a broad range of lattice spacings reaching down to 0.039 fm and to perform a combined charm-mass and continuum extrapolation. We use the ηc meson to define the physical charm-mass point and obtain a final value of aHLbL,c μ = (2.8±0.5)×10−11, whose uncertainty is dominated by the systematics of the extrapolation. Our result is consistent with the estimate based on a simple charm-quark loop, whilst being free of any perturbative scheme dependence on the charm mass. The mixed charm–light disconnected contraction contributes a small negative amount to the final value.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.title	The charm-quark contribution to light-by-light scattering in the muon (g − 2) from lattice QCD	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-8919	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 08 Physik, Mathematik u. Informatik	de
jgu.organisation.department	Helmholtz Institut Mainz	de
jgu.organisation.number	7940	-
jgu.organisation.number	9050	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	The European physical journal : C, Particles and fields	de
jgu.journal.volume	82	de
jgu.pages.alternative	664	de
jgu.publisher.year	2022	-
jgu.publisher.name	Springer	de
jgu.publisher.place	Berlin	de
jgu.publisher.issn	1434-6052	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.publisher.doi	10.1140/epjc/s10052-022-10589-2	de
jgu.organisation.ror	https://ror.org/023b0x485	-
jgu.subject.dfg	Naturwissenschaften	de
Appears in collections:	DFG-491381577-D

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