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We propose a non-exotic electromagnetic solution (within the standard model)to the cosmological 7Li problem based upon a narrow 2 MeV photo-emission linefrom the decay of light Glueballs (LGBs). These LGBs form within colorsuperconducting, tens of Fermi in size, quark clusters (SQCs) in theradiation-dominated post-BBN epoch. The mono-chromatic line from the LGB ->gamma + gamma reduces Big-Bang nucleosynthesis (BBN) 7Be by 2/3 withoutaffecting other abundances or Cosmic Microwave Background (CMB) physics,provided the combined mass of the SQCs is greater than the total baryonic massin the Universe. Following the LGB emission, SQC lose theirQuantum-ChromoDynamics (QCD) vacuum and decouple from the strong interaction.Being colorless, charge neutral, optically thin and transparent to hadrons,SQCs interact only gravitationally making them a viable cold dark matter (CDM)candidate. The drainage (i.e. quantum tunnelling) of SQC QCD vacuum to theexternal space-time (trivial QCD) vacuum offers a natural explanation of darkenergy in our model and allows for a cosmology which evolves into a{\Lambda}CDM universe at low redshift with a possible resolution of the Hubbletension. The connection between CDM and DE in our model supports the notionthat in-hadron confinement contains QCD condensates and disagrees with theconventional view of (space-filling) QCD condensates. We discuss SQC formationin heavy-ion collision experiments at moderate temperatures and the possibilityof detection of MeV photons from the LGB -> gamma + gamma decay.

Quark clusters, QCD vacuum and the cosmological 7Li, Dark Matter and Dark Energy problems