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Preprint
Report number arXiv:2410.08981
Title Enhancing the Sensitivity to Seesaw Predictions in Gauged BLBL 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) produced by proton bremsstrahlung may decay to HNLs, leading to a significant improvement in existing bounds on the (mHNL,Uα), where Uα represent the mixing between HNL and the active neutrinos with flavor α. 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-mediated HNL production can bring the seesaw mechanism of the neutrino masses within a broadened experimental reach.
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Copyright/License preprint: (License: CC0 1.0)



 


 Záznam vytvorený 2024-12-10, zmenený 2024-12-11


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