2021/03/31 by Chengcheng Han, Tong Li, Chang-Yuan Yao
Physics and Astronomy · #Collider #Lepton #Lepton number #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Seesaw molecular geometry #hep-ph
paper · pdf · doi:10.1103/physrevd.104.015036
published as Phys. Rev. D 104, 015036 (2021) · 17 pages, 5 figures, 1 table. version accepted by PRD
arxiv created 2021/07/30 · openalex publication_date 2021/07/30 · arxiv updated 2021/08/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The tau lepton plays an important role in the correlation between the low-energy neutrino oscillation data and the lepton flavor structure in heavy neutrino decay. We investigate the lepton flavor signatures with tau lepton at a hadron collider through lepton number violating processes. In the type I seesaw with U(1)_B\ensuremath-L extension, we study the pair production of heavy neutrinos via a Z^\ensuremath' resonance. We present a detailed assessment of the search sensitivity to the channels with a tau lepton in the subsequent decay of heavy neutrinos. For the benchmark model with Z^\ensuremath' only coupled to the third generation fermions, we find that the future circular collider can discover the lepton number violating signal with a tau lepton for M_Z^\ensuremath' up to 2.2 (3) TeV with the gauge coupling g^\ensuremath'=0.6 and the integrated luminosity of 3 (30) ab^\ensuremath-1. The test on the flavor combinations of the Standard Model charged leptons would reveal the specific nature of different heavy neutrinos.