Searching for heavy neutrino in terms of tau lepton at future hadron collider
Abstract
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 -L extension, we study the pair production of heavy neutrinos via a Z' 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' 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 MZ' up to 2.2 (3) TeV with the gauge coupling g'=0.6 and the integrated luminosity of 3 (30 ) ab-1 . The test on the flavor combinations of the Standard Model charged leptons would reveal the specific nature of different heavy neutrinos.
- Publication:
-
Physical Review D
- Pub Date:
- July 2021
- DOI:
- 10.1103/PhysRevD.104.015036
- arXiv:
- arXiv:2103.03548
- Bibcode:
- 2021PhRvD.104a5036H
- Keywords:
-
- High Energy Physics - Phenomenology
- E-Print:
- 17 pages, 5 figures, 1 table. version accepted by PRD