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Probing baryon asymmetry of the Universe at LHC and SHiP

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arxiv 1902.04535 v1 pith:TLF6X472 submitted 2019-02-12 hep-ph hep-ex

classification hep-phhep-ex
keywords universeallowasymmetrybaryondetectinggenerationshipactive
verification ladder T0 review T1 audit T2 compute T3 formal
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The origin of the baryon asymmetry of the Universe (BAU) is one of the major puzzles beyond the Standard Model. Detecting the particles responsible for the generation of the BAU would enormously boost our understanding of physics of the early Universe. Here we demonstrate that searches for displaced vertices at ATLAS, CMS and LHCb allow detecting heavy neutral leptons (HNL) with parameters that can simultaneously lead to the successful generation of the BAU and explain the masses and oscillations of active neutrinos. The combination of a dedicated LHC search program and a complementary Intensity Frontier experiment (such as SHiP) will allow exploring a sizeable part of the "minimal HNL baryogenesis" parameter space.

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