2007/01/31 by Shou-hua Zhu · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Boson #Coupling (piping) #Dark Matter and Cosmic Phenomena #Electron #Electron–positron annihilation #Hadron #Luminosity #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Positron #Quantum mechanics #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.75.115004
published as Phys.Rev.D75:115004,2007 · 3 refs added, minor text modification, PRD version
arxiv created 2007/05/11 · openalex publication_date 2007/06/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The O(MeV) spin-1 U boson has been proposed to mediate the interaction among electron-positron and O(MeV) dark matter, in order to account for the 511 keV \ensuremathγ-ray observation by SPI/INTEGRAL. In this paper the observability of such a kind of U boson at BESIII is investigated through the processes e+e^\ensuremath-\ensuremath→U\ensuremathγ and e+e^\ensuremath-\ensuremath→J/\ensuremathΨ\ensuremath→e+e^\ensuremath-U. We find that BESIII and high luminosity B factories have a comparable capacity to detect such a U boson. If the U boson decays mainly into dark matter, i.e. invisibly, BESIII can measure the coupling between the U boson and an electron-positron pair geR (see text) down to O(10^\ensuremath-5), and cover large parameter space which can account for 511 keV \ensuremathγ-ray observation. On the other hand, provided that U decays mainly into the electron-positron, BESIII can detect geR down to O(10^\ensuremath-3), and it is hard to explore the 511 keV \ensuremathγ-ray measurement allowed parameter space due to the irreducible QED backgrounds.