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Search for Darkonium in e^{+}e^{-} Collisions.

J P Lees1, V Poireau1, V Tisserand1

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This summary is machine-generated.

This study searched for darkonia, bound states of dark matter particles, using BABAR detector data. No evidence was found, setting new limits on dark sector interactions and particle masses.

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Area of Science:

  • Particle Physics
  • Cosmology
  • Dark Matter Research

Background:

  • Collider searches often focus on mediators, neglecting dark sector structures like darkonia.
  • Darkonia, bound states of dark matter particles, are predicted in models with light dark photons.

Purpose of the Study:

  • To search for a JPC=1-- darkonium state (ϒD) produced in electron-positron collisions.
  • To investigate dark sector structures by analyzing ϒD decays into dark photons (A').

Main Methods:

  • Utilized 514 fb⁻¹ of data from the BABAR detector.
  • Searched for the ϒD resonance in the e+e-→γϒD reaction.
  • Analyzed ϒD decays into three dark photons (A'), which then decay into leptons or pions.

Main Results:

  • No significant signal for the ϒD darkonium state was observed.
  • Established bounds on the gamma-A' kinetic mixing parameter.
  • Constrained the dark sector coupling constant and masses of A' and ϒD.

Conclusions:

  • The search did not yield evidence for darkonia within the explored parameter space.
  • The results place constraints on dark sector models and future search strategies.