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Preprint
Report number	arXiv:2410.08981
Title	Enhancing the Sensitivity to Seesaw Predictions in Gauged $B-L$ Scenarios
Author(s)	Capozzi, Francesco (L'Aquila U. ; Gran Sasso) ; Dutta, Bhaskar (Texas A-M) ; Gurung, Gajendra (Texas U., Arlington ; CERN) ; Jang, Wooyoung (Texas U., Arlington) ; Shoemaker, Ian M. (Virginia Tech.) ; Thompson, Adrian (Northwestern U.) ; Yu, Jaehoon (Texas U., Arlington)
Document contact	Contact: arXiv
Imprint	2024-10-11
Number of pages	11
Note	Corrected mistakes in the calculation of the neutral meson production and detector acceptance and subsequent sensitivity. Added information on the assumed parameterization of hadronic form factors in proton bremsstrahlung
Subject category	hep-ph ; Particle Physics - Phenomenology
Abstract	New gauge bosons coupled to heavy neutral leptons (HNLs) are simple and well-motivated extensions of the Standard Model. In searches for HNLs in proton fixed-target experiments, we find that a large population of gauge bosons ($Z^\prime$) produced by proton bremsstrahlung may decay to HNLs, leading to a significant improvement in existing bounds on the ($m_{HNL}, U_{\alpha}$), where $U_\alpha$ represent the mixing between HNL and the active neutrinos with flavor $\alpha$. We study this possibility in fixed target experiments with the 8 GeV proton beams, including SBND, MicroBooNE, and ICARUS, as well as DUNE and DarkQuest at 120 GeV. We find the projected sensitivities to additional $Z^\prime$-mediated HNL production can bring the seesaw mechanism of the neutrino masses within a broadened experimental reach.
Other source	Inspire
Copyright/License	preprint: (License: CC0 1.0)