2000/02/29 by V. Barger, Kingman Cheung · 40 citations
Physics and Astronomy · #Atomic and Molecular Physics #Condensed matter physics #Coupling (piping) #Coupling strength #Electron #Fermion #Lepton #Leptoquark #Materials science #Neutral current #Neutrino #Nuclear physics #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Scalar (mathematics) #hep-ex #hep-ph
paper · pdf · doi:10.1016/s0370-2693(00)00401-9
published in Physics Letters B 480(1-2), 149-154 (Elsevier BV) · published version, some discussions added
arxiv created 2000/03/18 · openalex publication_date 2000/05/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The recent measurement of atomic parity violation in cesium atoms shows a 2.3σ deviation from the standard model prediction. We show that such an effect can be explained by four-fermion contact interactions with specific chiralities or by scalar leptoquarks which couple to the left-handed quarks. For a coupling of electromagnetic strength, the leptoquark mass is inferred to be 1.1 to 1.3 TeV. We also show that these solutions are consistent with all other low-energy and high-energy neutral-current data.