Year: 2026
Type: preprint
Abstract: The $γZ$-box correction is an important electroweak contribution to precision parity-violation measurements, but its conventional low-energy treatment relies on an ambiguous effective quark-mass prescription. We revisit this correction using a finite-mass calculation that provides a well-defined perturbative contribution without introducing such an auxiliary scale. Applying the result to the Jefferson Lab PVDIS measurement shifts the extracted electron-quark couplings at the $10^{-3}$ level. We discuss the implications of this shift for precision electroweak tests and the need for a consistent separation of perturbative and non-perturbative hadronic contributions.
Source: arXiv (Cornell University)
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1175115578, G1401168639, G1855990336, G2038104832, G2121348967, G2262748287, G2301612669, G2309174360, G24120701, G252646220, G2601397997, G2660406951, G288263039, G294895050, EXC 2118: Precision Physics, Fundamental Interactions and Structure of Matter (PRISMA+), G300979063, G3461529875, G3480869486, G3518538256, G3681454997, G3784356304, G4042783231, G425668148, G430777504, G464105488, G5080475149, G5195188938, G5421974903, G5852091828, G6237201456, G6656126374, G6729080395, G7084143925, G745419941, G7549035430, G8522095481, G8575141037, G99296377
OpenAlex ID: W7213341992