Nucleon charges from Lattice QCD and their Implications for BSM Physics

An overview of the lattice QCD calculations of the charges, $g_{A,S,T}^{u,d,s}$, of nucleons and their implications for SM and BSM physics is presented. The axial charges, $g_{A}^{u,d,s}$, give the contribution of the intrinsic spin of the quarks to the nucleon; the tensor charges, $g_{T}^{u,d,s}$, give the contribution of the quark electric dipole moment operator to the nucleon EDM and are also the second Mellin moments of the transversity distribution of quarks in nucleons; and from the scalar charges $g_{A}^{u,d,s}$, we calculate the pion-nucleon sigma term $\sigma_{\pi N}$ and the strangeness content, $\sigma_s$, of the nucleon. The lattice QCD results for these charges are, in most cases, the most precise and are being used as input in phenomenological analyses. The complete set of charges, $g_{A,P,S,T,V}^{u,d,s,c,b,t}$, give the couplings, in low energy effective field theory formulation, of dark matter or novel Higgs-like interactions with nucleons in various Lorentz channels.

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Publication Details

Published
2025-10-24
DOI
https://doi.org/10.22323/1.483.0009
Primary Topic
Quantum Chromodynamics and Particle Interactions
Type
article
Field-Weighted Citation Impact
0.00

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Nucleon charges from Lattice QCD and their Implications for BSM Physics

Rajan Gupta
Quantum Chromodynamics and Particle Interactions
article

Nucleon charges from Lattice QCD and their Implications for BSM Physics

Rajan Gupta
article en

Abstract

An overview of the lattice QCD calculations of the charges, $g_{A,S,T}^{u,d,s}$, of nucleons and their implications for SM and BSM physics is presented. The axial charges, $g_{A}^{u,d,s}$, give the contribution of the intrinsic spin of the quarks to the nucleon; the tensor charges, $g_{T}^{u,d,s}$, give the contribution of the quark electric dipole moment operator to the nucleon EDM and are also the second Mellin moments of the transversity distribution of quarks in nucleons; and from the scalar charges $g_{A}^{u,d,s}$, we calculate the pion-nucleon sigma term $\sigma_{\pi N}$ and the strangeness content, $\sigma_s$, of the nucleon. The lattice QCD results for these charges are, in most cases, the most precise and are being used as input in phenomenological analyses. The complete set of charges, $g_{A,P,S,T,V}^{u,d,s,c,b,t}$, give the couplings, in low energy effective field theory formulation, of dark matter or novel Higgs-like interactions with nucleons in various Lorentz channels.

U.S. Department of Energy, Office of Science, High Energy Physics, Laboratory Directed Research and Development, Los Alamos National Laboratory
Openalex Percentile: Top 86%
Quantum Chromodynamics and Particle Interactions
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Nucleon charges from Lattice QCD and their Implications for BSM Physics — Rajan Gupta · (2025) | TGRS Research Map | TGRS