Why Is There More Matter Than Antimatter? Physics Still Can’t Explain It

Why does antimatter look so normal?

On March 24, 2026, scientists at CERN loaded a portable cryogenic trap containing 92 antiprotons onto a truck and transported it across the laboratory.

It sounds dangerous.

It wasn’t.

The amount of antimatter was microscopic. The real achievement was keeping those antiprotons trapped while the experiment was disconnected, moved and restarted — another sign of how precisely physicists can now control antimatter.

And that precision has created a deeper mystery.

Antihydrogen falls downward under gravity. Its spectral properties continue to agree with hydrogen. Proton and antiproton properties match to extraordinary precision. The more carefully physicists examine the antimatter mirror, the harder it becomes to find the obvious difference that could explain why the observable Universe ended up dominated by matter.

In this documentary, we explore one of the biggest unsolved problems in modern physics: baryogenesis.

Why did any matter survive the early Universe?

We examine Sakharov’s three conditions, CP violation, the Standard Model, LHCb’s historic observation of CP violation in baryon decays, precision antihydrogen experiments, CPT symmetry and the first direct measurements of antimatter under gravity.

In 2023, CERN’s ALPHA experiment directly observed antihydrogen responding to Earth’s gravity in the ordinary downward direction within experimental precision. The simple idea that antimatter just “falls upward” has therefore become much harder to maintain.

And the measurements keep improving.

In 2026, ALPHA measured the ground-state hyperfine splitting of antihydrogen with a precision of four parts per million — a hundredfold improvement over its earlier measurement. Once again, antimatter behaved as fundamental symmetry predicts.

Meanwhile, LHCb has observed CP violation in baryon decays for the first time. That is genuine matter–antimatter asymmetry, but it does not by itself explain the cosmic imbalance.

So where should we look next?

Neutrinos and leptogenesis. New Higgs physics. Electric dipole moments. Proton decay. Heavy particles. Hidden sectors. Perhaps physics that existed only during the extreme conditions of the early Universe.

The strange thing about antimatter is no longer simply that it annihilates when it touches matter.

It is that when we keep it alive long enough to measure it, it keeps looking almost exactly like matter.

And somehow, the Universe did not.


#Antimatter #CERN #Physics #Baryogenesis #ParticlePhysics #Universe #Cosmology