Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at √s =13 TeV

The CMS collaboration

研究成果: 雜誌貢獻期刊論文同行評審

25 引文 斯高帕斯(Scopus)

摘要

A search for heavy neutral leptons (HNLs), the right-handed Dirac or Majorana neutrinos, is performed in final states with three charged leptons (electrons or muons) using proton-proton collision data collected by the CMS experiment at s = 13 TeV at the CERN LHC. The data correspond to an integrated luminosity of 138 fb−1. The HNLs could be produced through mixing with standard model neutrinos ν. For small values of the HNL mass (<20 GeV) and the square of the HNL-ν mixing parameter (10−7–10−2), the decay length of these particles can be large enough so that the secondary vertex of the HNL decay can be resolved with the CMS silicon tracker. The selected final state consists of one lepton emerging from the primary proton-proton collision vertex, and two leptons forming a displaced, secondary vertex. No significant deviations from the standard model expectations are observed, and constraints are obtained on the HNL mass and coupling strength parameters, excluding previously unexplored regions of parameter space in the mass range 1–20 GeV and squared mixing parameter values as low as 10−7. [Figure not available: see fulltext.]

原文???core.languages.en_GB???
文章編號81
期刊Journal of High Energy Physics
2022
發行號7
DOIs
出版狀態已出版 - 7月 2022

指紋

深入研究「Search for long-lived heavy neutral leptons with displaced vertices in proton-proton collisions at √s =13 TeV」主題。共同形成了獨特的指紋。

引用此