Why precision luminosity measurements matter

The ATLAS and CMS experiments at the Large Hadron Collider (LHC) have performed luminosity measurements with spectacular precision. A recent physics briefing from CMS complements earlier ATLAS results and shows that by combining ...

What does 'luminosity' mean in particle physics?

Even on the hottest and driest days, rays from the sun are too weak to ignite a fire. But with a magnifying glass (or, in some unfortunate cases, a glass garden ornament), you can focus sunlight into a beam bright enough ...

New extremely variable quasar discovered

By analyzing data from astronomical surveys, Japanese astronomers have detected a new, extremely variable quasi-stellar object (QSO), or quasar. The newly found object, designated SDSS J125809.31+351943.0, brightened in optical ...

Super Proton Synchrotron to receive a new beam dump

By the end of the second long shutdown (LS2) of CERN's accelerator complex, a nine-metre-long object with several hundred tonnes of shielding will be installed around the beam line of the Super Proton Synchrotron (SPS). But ...

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