Search for a massless dark photon in ${\Lambda }_c^{+}\to p{\gamma }^{\prime }$ decay

Abstract

A search for a massless dark photon ${\gamma }^{\prime }$ is conducted using 4.5 ${\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at center-of-mass energies between 4.600 and 4.699 $\mathrm{GeV}$ with the BESIII detector at BEPCII. No significant signal is observed, and the upper limit on the branching fraction $\mathcal{B}({\Lambda }_c^{+}\to p{\gamma }^{\prime })$ is determined to be $8.0\times 10^{-5}$ at 90% confidence level.

9 Pages, 5 figures

References in corpus (10)

• Secluded U(1) below the weak scale
• Future Physics Programme of BESIII
• Dark Matter and Dark Radiation
• Test of lepton universality in beauty-quark decays
• FCNC decays of SM fermions into a dark photon
• Probing a dark photon using rare leptonic kaon and pion decays
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to n{\pi }^{+}$
• Searching for dark photons in hyperon decays
• Seeking massless dark photons in the decays of charmed hadrons
• Search for the decay $J/\psi \to \gamma +\mathrm{invisible}$

Cited by in corpus (8)

• Topological amplitudes of charmed baryon decays in the $SU(3{)}_F$ limit
• Flavor phenomenology of light dark sectors
• Search for the massless dark photon with $D^0\to \omega {\gamma }^{\prime }$ and $D^0\to \gamma {\gamma }^{\prime }$
• Measurement of the absolute branching fraction of the three-body decay ${\Lambda }_c^{+}\to {\Xi }^0{K}^{+}{\pi }^0$ and search for ${\Lambda }_c^{+}\to n{K}^{+}{\pi }^0$, ${\Sigma }^0{K}^{+}{\pi }^0$ and $\Lambda K^{+}{\pi }^0$
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to {\Sigma }^{-}{K}^{+}{\pi }^{+}$
• Isospin violating decays of vector charmonia
• Search for sub-GeV invisible particles in inclusive decays of $J/\psi$ to $\varphi$
• Probing invisible particles with charm