Geneva

ATLAS observes potential four-charm tetraquark

In the 1960s, physicists Gell-Mann and Zweig independently proposed the existence of the subatomic particles known as quarks. Their model successfully described the particles interacting by the strong force — hadrons — as being made up of two or three quarks. At the same time, theorists also predicted the existence of exotic hadrons with more …

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ATLAS experiment records “first physics” at new high-energy frontier

†We have proton collisions in the ATLAS experiment† At 4:47 PM CEST, the Large Hadron Collider (LHC) officially kicked off its third operating period (Run 3). The LHC collides with proton beams with a world-record-breaking energy of 13.6 tera electron volts (TeV). The higher beam energy and intensity of Run 3 allows the ATLAS experiment …

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