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Scalar resonances in the hadronic light-by-light contribution to the muon $(g-2)$

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arxiv 2110.05962 v2 pith:OEBHQTUV submitted 2021-10-12 hep-ph

Luigi Cappiello , Oscar Catà , Giancarlo D'Ambrosio This is my paper · ORCID
classification hep-ph
keywords contributionhadroniclight-by-lightmodelmuonscalarsigmaagreement
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We evaluate the contribution of scalar mesons to the hadronic light-by-light piece of the muon anomalous magnetic moment, using a warped five-dimensional model and holographic methods. We assess the contribution of the lightest, sub-GeV scalars $\sigma(500)$, $a_0(980)$ and $f_0(980)$ together with their associated towers of excited states, which the model generates automatically. Our results point at a clearly negative contribution, overwhelmingly dominated by the $\sigma(500)$ meson, that we estimate at $a_\mu^{\rm{HLbL,S}}=-9(2)\cdot 10^{-11}$. This number is in very good agreement with the most recent determinations from dispersive analyses.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Hadronic vacuum polarization for the muon $g-2$ from lattice QCD: Long-distance and full light-quark connected contribution

    hep-lat 2024-12 conditional novelty 6.0 of 10

    The light-quark connected hadronic vacuum polarization contribution to muon g-2 is determined to 0.69% precision, 655.2(4.5) x 10^-10, from lattice QCD.

  2. Superconnections in AdS/QCD and the hadronic light-by-light contribution to the muon $g-2$

    hep-ph 2024-11 accept novelty 6.0 of 10

    A scalar-extended Chern-Simons superconnection in hard-wall AdS/QCD improves f1-f1' mixing and photon rates while leaving the combined axial-vector plus excited-pseudoscalar HLBL contribution to muon g-2 stable near 32e-11.

  3. Constraints on the hadronic light-by-light tensor in corner kinematics for the muon $g-2$

    hep-ph 2024-11 conditional novelty 6.0 of 10

    In corner kinematics, the hadronic light-by-light tensor including gluonic corrections reduces at the studied order to a compact integrand depending only on axial-current form factors.

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