Mirror neutrons in Oak Ridge experiment
Chapter 1

The broken mirror of our universe

Chapter 2

The dark sector and its hidden forces

Chapter 3

Hunting for the invisible in the lab

Chapter 4

Mirror stars and invisible galaxies

Ch 3 · Hunting for the invisible in the lab
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007skaty Physicists study the unstable exotic atom called orthopositronium

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007skaty Orthopositronium Laser Cooling

Lasers flash, orbits chill, orthopositronium slows down!

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007skaty Physicists investigate the mystery of the vanishing neutron.

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The vanishing neutron puzzle

007skaty Bottle experiments measure neutron lifetimes at 879 seconds, but beam tests find 888 seconds, hinting at invisible mirror neutrons

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The neutron oscillation experiment

007skaty The Oak Ridge experiment tests if particles can bypass solid barriers entirely.

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Little Ghost Detector
BETA

007skaty Swipe your ghost detector to learn how forces interact in a parallel world of matter.

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Fun Fact

Wall-passing particles: In the Oak Ridge neutron experiment, any neutron that successfully transformed into a mirror neutron would pass through a 1-inch silicon carbide wall as if it weren't even there.

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Gossip

Which experimental method do you think will prove mirror matter first?

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Quiz

What particle is suspected of occasionally 'oscillating' or transforming into a mirror counterpart to cause this discrepancy?

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Gossip

If you were a scientist, would you risk your career on a wild theory?

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Quiz

What is the approximate difference in neutron lifetime measured between the 'bottle' and 'beam' methods?

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Quiz

What must be applied to a beam of neutrons to maximize their rate of oscillation into mirror neutrons?

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Quiz

At which US National Laboratory did researchers design an experiment to shoot neutrons through a solid wall?

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Quiz

Which underground laboratory in Italy detected a controversial seasonal fluctuation in its dark matter data?

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Quiz

Why are dark matter direct-detection experiments placed deep underground?

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Quiz

What is 'orthopositronium' composed of?

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Quiz

How does the mirror matter hypothesis explain the anomalous decay rate of orthopositronium?

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