期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 12, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP12(2019)070
关键词
Beyond Standard Model; Neutrino Physics
资金
- Ministry of Science and Technology (MOST) of Taiwan [MOST-104-2628-M-002-014-MY4, MOST-108-2112-M-002-005-MY3]
- CONICYT-Chile FONDECYT [3190051]
- Japan Society for the Promotion of Science (JSPS) Post-doctoral Fellowship for Research in Japan
- [MOST-107-2811-M-002-3120]
We study the LHC sensitivity to probe a long-lived heavy neutrino N in the context of Z' models. We focus on displaced vertex signatures of N when pair produced via a Z', decaying to leptons and jets inside the inner trackers of the LHC experiments. We explore the LHC reach with current long-lived particle search strategies for either one or two displaced vertices in association with hadronic tracks or jets. We focus on two well-motivated models, namely, the minimal U(1)(B-L) scenario and its U(1)(X) extension. We find that searches for at least one displaced vertex can cover a significant portion of the parameter space, with light-heavy neutrino mixings as low as vertical bar V-lN vertical bar(2) approximate to 10(-17), and l = e, mu accessible across GeV scale heavy neutrino masses.
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