Resurgence of $Z^{\prime }$ from the single electron-muon event at ATLAS

Abstract

Inspired by the recent single $e^{\pm }{\mu }^{\mp }$ event at 2.1 TeV invariant mass from the ATLAS at $\sqrt{s}=13$ TeV with 3.2 fb${}^{-1}$ luminosity, we propose an explanation using a $Z^{\prime }$ gauge boson, which possesses lepton-flavor-changing neutral currents originated from non-universal couplings to charged leptons. We assume that the left-handed charged-lepton mixing matrix equals to the PMNS matrix and no mixing in the neutrino sector to make this phenomenological $Z^{\prime }$ model more predictive. There are indeed some parameter regions, where the $Z^{\prime }$ can generate a large enough $e^{\pm }{\mu }^{\mp }$ production cross section, while at the same time satisfies various observables from lepton-flavor violation and other constraints from the LHC.

arXiv comment14 pages, 1 table, 1 figure

References in corpus (19)

• The Physics of Heavy Z' Gauge Bosons
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Muon Decay and Physics Beyond the Standard Model
• Measurement of form-factor independent observables in the decay $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$
• Dressing L_mu - L_tau in Color
• Search for narrow resonances decaying to dijets in proton-proton collisions at sqrt(s) = 13 TeV
• Search for New Phenomena in Dijet Mass and Angular Distributions from $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at sqrt(s) = 8 TeV
• On minimal Z' explanations of the B->K*mu+mu- anomaly
• Can Neutrino Mixings Arise from the Charged Lepton Sector?
• Anomaly-Free Sets of Fermions
• Single Top-Quark Production in Flavor-Changing Z' Models
• Muon-electron conversion in strange quark sea
• Search for contact interactions and large extra dimensions in the dilepton channel using proton-proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for resonances in the mass distribution of jet pairs with one or two jets identified as $b$-jets in proton--proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Are the B decay anomalies related to neutrino oscillations?
• Nuclear aspects of neutral current non-standard $\nu$-nucleus reactions and the role of the exotic ${\mu }^{-}\to e^{-}$ transitions experimental limits
• Search for lepton flavour violating decays of heavy resonances and quantum black holes to an e-mu pair in proton-proton collisions at sqrt(s) = 8 TeV
• Constraints on $Z^{\prime }$ Boson within Minimal Flavor Violation

Cited by in corpus (3)

• $B$ decay anomalies and dark matter from vectorlike confinement
• $B$ decay anomalies from nonabelian local horizontal symmetry
• Search for opposite sign muon-tau pair and a b-jet at LHC in the context of flavor anomalies