Search for heavy neutral leptons in B-meson decays

Abstract

A search for long-lived heavy neutral leptons produced in B-meson decays and decaying to a ${\mu }^{\pm }{\pi }^{\mp }$ final state is performed with data collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of $5{\mathrm{fb}}^{-1}$. The results are interpreted in both lepton-number-conserving and lepton-number-violating scenarios. No significant excess is observed. Constraints are placed on the squared mixing element $|U_{\mu N}{|}^2$ to the active muon neutrino, under the assumption that couplings to other lepton flavours are negligible, in the mass range of $1.6$-$5.5$ GeV.

All figures and tables, along with any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/1607/ (LHCb public pages)

References in corpus (25)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• Asymptotic formulae for likelihood-based tests of new physics
• LHCb Detector Performance
• The $\nu$MSM, Dark Matter and Baryon Asymmetry of the Universe
• The $\nu$MSM, Dark Matter and Neutrino Masses
• The p_T Spectrum in Heavy-Flavour Hadroproduction
• Trial factors for the look elsewhere effect in high energy physics
• Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos
• Neutrino Mass Models
• Parameterized Machine Learning for High-Energy Physics
• Baryon Asymmetry of the Universe in the Standard Model
• Models of Neutrino Masses and Mixings
• Phenomenology of GeV-scale Heavy Neutral Leptons
• RapidSim: an application for the fast simulation of heavy-quark hadron decays
• Interpolation between multi-dimensional histograms using a new non-linear moment morphing method
• Mapping the viable parameter space for testable leptogenesis
• Review of searches for vector-like quarks, vector-like leptons, and heavy neutral leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the CMS experiment
• Neutrino oscillations: from an historical perspective to the present status
• Bounds on right-handed neutrino parameters from observable leptogenesis
• The LHCb Stripping Project: Sustainable Legacy Data Processing for High-Energy Physics
• zfit: scalable pythonic fitting
• Semileptonic decays of charmed and beauty baryons with sterile neutrinos in the final state
• On the collider-testability of the type-I seesaw model with 3 right-handed neutrinos

Cited by in corpus (1)

• Search for lepton-number-violating $B^{-}\to D^{(\ast )+}{\mu }^{-}{\mu }^{-}$ decays