Neutrinoless double-beta decay in a finite volume from relativistic effective field theory

作     者：Y. L. Yang P. W. Zhao 

作者机构：State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing 100871 China 

出 版 物：《Physical Review D》 (Phy. Rev. D)

年 卷 期：2025年第111卷第1期

页      面：014507-014507页

核心收录：

基　　金：Peking University, PKU National Natural Science Foundation of China, NSFC, (12475117, 11935003, 12141501, 123B2080) National Natural Science Foundation of China, NSFC National Key Research and Development Program of China, NKRDPC, (2024YFE0109803) National Key Research and Development Program of China, NKRDPC State Key Laboratory of Nuclear Physics and Technology, Peking University, SKLNPT, (NPT2023ZX03) State Key Laboratory of Nuclear Physics and Technology, Peking University, SKLNPT National Key Laboratory of Neutron Science and Technology, (NST202401016) 

摘      要：The neutrinoless double-beta decay process nn→ppee within the light Majorana-exchange scenario is studied using the relativistic pionless effective field theory (EFT) in finite-volume cubic boxes with the periodic boundary conditions. Using the low-energy two-nucleon scattering observables from lattice quantum chromodynamics (QCD) available at mπ=300, 450, 510, and 806 MeV, the leading-order nn→ppee transition matrix elements are predicted and their volume dependence is investigated. The predictions for the nn→ppee transition matrix elements can be directly compared to the lattice QCD calculations of the nn→ppee process at the same pion masses. In particular for the matrix element at mπ=806 MeV, the predictions with relativistic pionless EFT are confronted to the recent first lattice QCD evaluation. Therefore, the present results are expected to play a crucial role in the benchmark between the nuclear EFTs and the upcoming lattice QCD calculations of the nn→ppee process, which would provide a nontrivial test on the predictive power of nuclear EFTs on neutrinoless double-beta decay.