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Particle Physics

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XENON100

MISPLACED MATTER  A search for dark matter by the XENON100 experiment has found nothing. Photomultiplier tubes within the detector, shown above, detect light produced in interactions possibly caused by dark matter particles.

Mainz Microtron

PETITE PROTON  An electron scattering experiment (shown) at the Mainz Microtron in Germany may have found evidence that supports the case for a smaller proton, according to a new analysis of old data.

subatomic particle computer simulation

NOT NOTHING  Even in empty space, subatomic particles are plentiful. In a vacuum, particles called quarks and gluons still appear, thanks to ever-present quantum fields, shown above in a computer simulation. A new book explains such counterintuitive properties of the void.

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