The most exotic fluid has an unexpectedly low viscosity

Collisions of lead nuclei in the Large Hadron Collider (LHC) take place at such great energies that quarks that are normally confined inside nucleons are released and, together with the gluons that hold them together, form ...

For one day only, LHC collides xenon beams

Today, the LHC is getting a taste of something unusual. For eight hours, the Large Hadron Collider is accelerating and colliding xenon nuclei, allowing the large LHC experiments, ATLAS, ALICE, CMS and LHCb, to record xenon ...

'Fire-streaks' are created in collisions of atomic nuclei

At very high energies, the collision of massive atomic nuclei in an accelerator generates hundreds or even thousands of particles that undergo numerous interactions. Physicists at the Institute of Nuclear Physics of the Polish ...

Using fast particles to probe hot matter in nuclear collisions

The hottest matter that existed in the early universe after the Big Bang is created in collisions of high-energy nuclei. Using information on the propagation and attenuation of fast particles coming from the collisions, nuclear ...

Calorimeter components put to the test

Tracking particles created in subatomic smashups takes precision. So before the components that make up detectors at colliders like the Relativistic Heavy Ion Collider (RHIC) get the chance to see a single collision, physicists ...

LHC completes proton run for 2015, preps for lead

The Large Hadron Collider (LHC) has successfully completed its planned proton run for 2015, delivering the equivalent of about 400 trillion (1012) proton-proton collisions – some 4 inverse femtobarns of data – to both ...

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