Journal or Book Title
Journal of High Energy Physics
We study the prospects of a displaced-vertex search of sterile neutrinos at the Large Hadron Collider (LHC) in the framework of the neutrino-extended Standard Model Effective Field Theory (nu SMEFT). The production and decay of sterile neutrinos can proceed via the standard active-sterile neutrino mixing in the weak current, as well as through higher-dimensional operators arising from decoupled new physics. If sterile neutrinos are long-lived, their decay can lead to displaced vertices which can be reconstructed. We investigate the search sensitivities for the ATLAS/CMS detector, the future far-detector experiments: AL3X, ANUBIS, CODEX-b, FASER, MATHUSLA, and MoEDAL-MAPP, and at the proposed fixed-target experiment SHiP. We study scenarios where sterile neutrinos are predominantly produced via rare charm and bottom mesons decays through minimal mixing and/or dimension-six operators in the nu SMEFT Lagrangian. We perform simulations to determine the potential reach of high-luminosity LHC experiments in probing the EFT operators, finding that these experiments are very competitive with other searches.
UMass Amherst Open Access Policy
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Ministry of Science and Technology (MoST) of TaiwanMinistry of Science and Technology, Taiwan [MoST-109-2811-M-007-509]; Ministry of Science, ICT & Future Planning of Korea; Pohang City Government; Gyeongsangbuk-do Provincial Government through the Young Scientist Training Asia Pacific Economic Cooperation program of the Asia Pacific Center for Theoretical Physics; BMBFFederal Ministry of Education & Research (BMBF) [05H18PDCA1]
de Vries, Jordy; Dreiner, Herbert K.; Günther, Julian Y.; Wang, Zeren Simon; and Zhou, Guanghui, "Long-Lived Sterile Neutrinos at the LHC in Effective Field Theory" (2021). Journal of High Energy Physics. 1290.