Peer-reviewedCC BY 4.0Journal of High Energy Physics
γZ box at low energy
- 1Universitat Autònoma de Barcelona
- 2The Barcelona Institute of Science and Technology (BIST)
- 3Johannes Gutenberg-Universität
Abstract
A bstract : We calculate the 1-loop γZ box-graph correction to electron-quark scattering at low energy and low momentum transfer. Both electron and quark masses are kept non-zero. We express our result in terms of low-energy couplings for 4-fermion interaction including parity-violating couplings. We study the zero-mass limits and show that a non-zero electron mass is sufficient to obtain finite, well-defined couplings which are insensitive to a hadronic mass cutoff. We finally discuss the impact of our results on the determination of the weak charge of the proton from polarized electron-proton scattering.
BibTeX
@article{duch2026energy,
title = {{γZ box at low energy}},
author = {Balma Duch and Pere Masjuan and Hubert Spiesberger},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)082},
url = {https://link.springer.com/10.1007/JHEP10(2026)082},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - γZ box at low energy
AU - Balma Duch
AU - Pere Masjuan
AU - Hubert Spiesberger
PY - 2026
DA - 2026/10/08
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)082
UR - https://link.springer.com/10.1007/JHEP10(2026)082
AB - A bstract : We calculate the 1-loop γZ box-graph correction to electron-quark scattering at low energy and low momentum transfer. Both electron and quark masses are kept non-zero. We express our result in terms of low-energy couplings for 4-fermion interaction including parity-violating couplings. We study the zero-mass limits and show that a non-zero electron mass is sufficient to obtain finite, well-defined couplings which are insensitive to a hadronic mass cutoff. We finally discuss the impact of our results on the determination of the weak charge of the proton from polarized electron-proton scattering.
SN - 1029-8479
ER -