2020/07/31 by Debasish Borah, Lopamudra Mukherjee, Soumitra Nandi
Computer Science · Physics and Astronomy · #Anomalous magnetic dipole moment #Anomaly (physics) #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Dark matter #Gauge symmetry #Lepton #Muon #Neutrino #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Standard Model (mathematical formulation) #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep12(2020)052
Version accepted for publication in JHEP, few references added, No major changes in manuscript
openalex created_date 2020/08/03 · arxiv created 2020/10/28 · openalex publication_date 2020/12/01 · arxiv updated 2020/12/30 · openalex updated_date 2026/08/05
A bstract We study a generic leptophilic U(1) X extension of the standard model with a light gauge boson. The U(1) X charge assignments for the leptons are guided by lepton universality violating (LUV) observables in semileptonic b → sℓℓ decays, muon anomalous magnetic moment and the origin of leptonic masses and mixing. Anomaly cancellation conditions require the addition of new chiral fermions in the model, one of which acts as a dark matter (DM) candidate when it is stabilised by an additional Z2 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>Z</mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:math> symmetry. From our analysis, we show two different possible models with similar particle content that lead to quite contrasting neutrino mass origin and other phenomenology. The proposed models also have the potential to address the anomalous results in b → cℓν ℓ decays like R ( D ) , R ( D ∗ ), electron anomalous magnetic moment and the very recent KOTO anomaly in the kaon sector. We also discuss different possible collider signatures of our models which can be tested in future.