Atomic structure calculations for constraining new electron-electron forces
Abstract
We present a general approach for calculating new electron-electron interactions with atomic structure theory, include dominant many-body effects, and extract bounds for parity-odd cases. The procedure is valid for any mediator mass and improves previous calculations by including many-body corrections to the new interaction through the time-dependent Hartree-Fock method. Bounds on coupling strengths are then extracted for scalar-pseudoscalar and vector-axial vector interactions by comparison with experimental atomic electric dipole moments and parity non-conserving (PNC) transitions respectively. In the latter case, our calculations rule out any coupling-mass ratio |g^e_V g^e_A|/m_X^2 greater than 10^-11 MeV^-2 above m_X ~ 10 MeV, covering a previously unconstrained mass region. We also report an updated calculation of the regular (Standard Model) electron-electron Z^0 exchange contribution to the 6s-7s PNC transition amplitude E_PNC in cesium.
Versions
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BibTeX
@misc{west2026atomic,
title = {{Atomic structure calculations for constraining new electron-electron forces}},
author = {Cameron J. West and Benjamin M. Roberts},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2608.26532},
eprint = {2608.26532},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.26532},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Atomic structure calculations for constraining new electron-electron forces
AU - Cameron J. West
AU - Benjamin M. Roberts
PY - 2026
DA - 2026/11/02
PB - arXiv
DO - 10.48550/arxiv.2608.26532
UR - https://arxiv.org/abs/2608.26532
AB - We present a general approach for calculating new electron-electron interactions with atomic structure theory, include dominant many-body effects, and extract bounds for parity-odd cases. The procedure is valid for any mediator mass and improves previous calculations by including many-body corrections to the new interaction through the time-dependent Hartree-Fock method. Bounds on coupling strengths are then extracted for scalar-pseudoscalar and vector-axial vector interactions by comparison with experimental atomic electric dipole moments and parity non-conserving (PNC) transitions respectively. In the latter case, our calculations rule out any coupling-mass ratio |g^e_V g^e_A|/m_X^2 greater than 10^-11 MeV^-2 above m_X ~ 10 MeV, covering a previously unconstrained mass region. We also report an updated calculation of the regular (Standard Model) electron-electron Z^0 exchange contribution to the 6s-7s PNC transition amplitude E_PNC in cesium.
ER -