Exploring Bosonic Mediator of Interaction at BESIII

Abstract

We present a comprehensive investigation on the possibility of the search for new force mediator $X$ boson in $e^{+}{e}^{-}$ collision and $J/\psi$ decay at the BESIII experiment. The typical interactions of $X$ boson coupling to leptons and quarks are explored. The production and decay properties of this $X$ particle, the product/decay chains $e^{+}{e}^{-}\to X\gamma \to e^{+}{e}^{-}\gamma$ and $J/\psi \to X\gamma \to {\mu }^{+}{\mu }^{-}\gamma$, and exclusion limits on the reduced coupling strength parameters as functions of $X$ boson mass are presented. With the data set of tens of fb${}^{-1}{e}^{+}{e}^{-}$ or $10^{10}J/\psi$, we find that the exclusion limits on the coupling strength parameters fall in the range of $10^{-3}\sim 10^{-4}$, depending on $m_X$ assuming the decay width 10 eV$<{\Gamma }_X<$100 eV reasonably, for various hypotheses in the literature. According to our estimation, the search for new force mediator $X$ boson in both $e^{+}{e}^{-}$ collision and $J/\psi$ decay are accessible in nowadays BESIII experiment.

To appear in EPJC; 26 pages, 13 figures; Fig.s (5, 6, 9, 11, 12, 13) are reploted and their discussion are updated; three paragraphs, two equations and 1 table are added; two errors are corrected

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• Dark photon production via $\gamma \gamma \to \gamma A^{\prime }$
• Polarization effects in the search for dark vector boson at $e^{+}{e}^{-}$ colliders
• Production and constraints for a massive dark photon at electron-positron colliders