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Lifetime of the dark Z bosonLifetime of the dark Z boson

Other Titles
Lifetime of the dark Z boson
Authors
Jung, Dong-WonLee, Kang YoungYu, Chaehyun
Issue Date
Dec-2023
Publisher
Korean Physical Society
Keywords
hidden sector; dark Z boson; LHC; SHiP
Citation
Journal of the Korean Physical Society, v.83, no.12, pp 932 - 940
Pages
9
Indexed
SCIE
SCOPUS
KCI
Journal Title
Journal of the Korean Physical Society
Volume
83
Number
12
Start Page
932
End Page
940
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/68975
DOI
10.1007/s40042-023-00976-7
ISSN
0374-4884
1976-8524
Abstract
The mediator particle between the Standard Model sector and a hidden sector might have a long lifetime to show the observable displaced vertices in experiments. Considering a fermionic dark matter model in which the hidden sector is connected to the Standard Model by an additional Higgs doublet field, the mediator dark Z boson may live long enough. We explore the possibility to observe the displaced vertices of the long-lived dark Z boson at the CERN LHC and at the proposed SHiP experiment. We find that the ATLAS and CMS searches for the long-lived dark Z boson can probe the mass range 7<mZ′<150MeV with 150 fb - 1 integrated luminosity at the LHC run 3, and the SHiP experiment will probe 2me<mZ′<15MeV range with 6 × 10 20 protons on target in total 15 years. The dark matter phenomenology is also discussed in the region where such a long-lived mediator is detectable. © 2023, The Korean Physical Society.
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