Detecting light leptophilic gauge boson at BESIII detector

Abstract

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 $U(1{)}_{L_i-L_j}$ with $L_i$ 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 $e^{+}{e}^{-}\to U\gamma$, followed by $U\to e^{+}{e}^{-}$, $U\to {\mu }^{+}{\mu }^{-}$ and $U\to \nu \overline{\nu }$. In the invisible channel where U-boson decays into neutrinos, BESIII can measure the coupling of the extra $U(1)$ down to $O(10^{-4})\sim O(10^{-5})$ 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 $O(10^{-3})\sim O(10^{-4})$ due to the large irreducible QED backgrounds.

7pages, 9figures; V2: SecIII corrected, discussions added

References in corpus (12)

• Cosmology and Astrophysics of Minimal Dark Matter
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
• Non-Abelian Dark Sectors and Their Collider Signatures
• Heavy Dark Matter Through the Higgs Portal
• Neutrino Constraints on the Dark Matter Total Annihilation Cross Section
• Investigating electron interacting dark matter
• Constraints on Light Dark Matter and U bosons, from psi, Upsilon, K+, pi0, eta and eta' decays
• Dark matter and sub-GeV hidden U(1) in GMSB models
• Detecting MeV Gauge Bosons With High-Energy Neutrino Telescopes
• U-boson at BESIII
• U-boson and the HyperCP exotic events

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