TY - JOUR AU - Falkowski, A. AU - Gonzalez-Alonso, M. AU - Palavric, A. AU - Rodriguez-Sanchez, A. PY - 2024 DA - 2024// TI - Constraints on subleading interactions in beta decay Lagrangian T2 - J. High Energy Phys. JO - Journal of High Energy Physics SP - 091 EP - 54pp VL - 02 IS - 2 PB - Springer KW - Effective Field Theories KW - Hadronic Matrix Elements and Weak Decays KW - Effective Field Theories of QCD KW - SMEFT AB - We discuss the effective field theory (EFT) for nuclear beta decay. The general quark-level EFT describing charged-current interactions between quarks and leptons is matched to the nucleon-level non-relativistic EFT at the OMeV momentum scale characteristic for beta transitions. The matching takes into account, for the first time, the effect of all possible beyond-the-Standard-Model interactions at the subleading order in the recoil momentum. We calculate the impact of all the Wilson coefficients of the leading and subleading EFT Lagrangian on the differential decay width in allowed beta transitions. As an example application, we show how the existing experimental data constrain the subleading Wilson coefficients corresponding to pseudoscalar, weak magnetism, and induced tensor interactions. The data display a 3.5 sigma evidence for nucleon weak magnetism, in agreement with the theory prediction based on isospin symmetry. SN - 1029-8479 UR - https://arxiv.org/abs/2112.07688 UR - https://doi.org/10.1007/JHEP02(2024)091 DO - 10.1007/JHEP02(2024)091 LA - English N1 - WOS:001163170700004 ID - Falkowski_etal2024 ER -