2009/04/30 by Peng‐Fei Yin, Peng-fei Yin, Jia Liu +1 · 36 citations
Physics and Astronomy · #Anomaly (physics) #Cosmology and Gravitation Theories #Coupling (piping) #Dark Matter and Cosmic Phenomena #Dark matter #Gauge (firearms) #Gauge boson #Gauge theory #Lepton #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Standard Model (mathematical formulation) #hep-ph
paper · pdf · open access · doi:10.1016/j.physletb.2009.07.014
published in Physics Letters B 679(4), 362-368 (Elsevier BV) · 7pages, 9figures; V2: SecIII corrected, discussions added
arxiv created 2009/07/14 · openalex publication_date 2009/07/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The O(GeV) extra U(1) gauge boson named U-boson, has been proposed to mediate the interaction among leptons and dark matter (DM), in order to account for the observations by PAMELA and ATIC. In such kind of models, the extra U(1) gauge group can be chosen as U(1)Li−Lj with Li the i-th generation lepton number. This anomaly-free model provides appropriate dark matter relic density and boost factor required by experiments. In this work the observability of such kind of U-boson at BESIII detector is investigated through the processes e+e−→Uγ, followed by U→e+e−, U→μ+μ− and U→νν¯. In the invisible channel where U-boson decays into neutrinos, BESIII can measure the coupling of the extra U(1) down to O(10−4)∼O(10−5) because of the low Standard Model backgrounds. In the visible channel where U-boson decays into charged lepton pair, BESIII can only measure the coupling down to O(10−3)∼O(10−4) due to the large irreducible QED backgrounds.