Search for the massless dark photon with $D^0\to \omega {\gamma }^{\prime }$ and $D^0\to \gamma {\gamma }^{\prime }$

Abstract

Using $7.9\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at $\sqrt{s}=3.773$ GeV with the BESIII detector at the BEPCII collider, we search for the massless dark photon with the flavor-changing neutral current processes $D^0\to \omega {\gamma }^{\prime }$ and $D^0\to \gamma {\gamma }^{\prime }$ for the first time. No significant signals are observed, and the upper limits at the 90% confidence level on the massless dark photon branching fraction are set to be $1.1\times 10^{-5}$ and $2.0\times 10^{-6}$ for $D^0\to \omega {\gamma }^{\prime }$ and $D^0\to \gamma {\gamma }^{\prime }$, respectively. These results provide the most stringent constraint on the new physics energy scale associated with $cu{\gamma }^{\prime }$ coupling in the world, with the new physics energy scale related parameter $|\mathbb{C}{|}^2+|{\mathbb{C}}_5{|}^2<8.2\times 10^{-17}{\mathrm{GeV}}^{-2}$ at the 90% confidence level.

10 pages, 3 figures

References in corpus (21)

• Search for a dark photon in e+e- collisions at BABAR
• Dark Matter and Dark Radiation
• The Dark Photon
• Search for $A^{\prime }\to {\mu }^{+}{\mu }^{-}$ decays
• A search for two body muon decay signals
• Evidence for $B^{+}\to K^{+}\nu \bar{\nu }$ decays
• Search for production of an invisible dark photon in ${\pi }^0$ decays
• Probing a dark photon using rare leptonic kaon and pion decays
• FCNC decays of SM fermions into a dark photon
• Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Searching for dark photons in hyperon decays
• Visualization for physics analysis improvement and applications in BESIII
• Search for a massless dark photon in ${\Lambda }_c^{+}\to p{\gamma }^{\prime }$ decay
• Search for invisible decays of a dark photon using $e^{+}{e}^{-}$ annihilation data at BESIII
• Seeking massless dark photons in the decays of charmed hadrons
• Search for $D^0\to \gamma \gamma$ and improved measurement of the branching fraction for $D^0\to {\pi }^0{\pi }^0$
• Kaon decays shedding light on massless dark photons
• Search for the semi-muonic charmonium decay $J/\psi \to D^{-}{\mu }^{+}{\nu }_{\mu }+c.c.$
• Phenomenological consequences of an interacting multicomponent dark sector
• Search for dark photons from Higgs boson decays via $ZH$ production with a photon plus missing transverse momentum signature from $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Combination of searches for Higgs boson decays into a photon and a massless dark photon using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Cited by in corpus (3)

• Flavor phenomenology of light dark sectors
• Probing invisible particles with charm
• Search for sub-GeV invisible particles in inclusive decays of $J/\psi$ to $\varphi$