The ATLAS and CMS experiments at CERN are taking a very cautionary position concerning a measurement that deviates slightly from what would be expected from known physics. Studying events containing two photons and assuming that these photons originate from the decay of a massive particle, both experiments see a small excess in the mass region of 750-760 GeV. The same analyses were also carried out on the data from the first LHC run and, within the statistics available, did not yield a sizable excess over the expectations from standard physics processes.
In this section you will find CERN's latest updates and press releases.
Geneva, 25 November 2015. After the successful restart of the Large Hadron Collider and its first months of data taking with proton collisions at a new energy frontier, the LHC is moving to a new phase, with the first lead-ion collisions of season 2 at an energy about twice as high as that of any previous collider experiment. Following a period of intense activity to re-configure the LHC and its chain of accelerators for heavy ion beams, CERN1’s accelerator specialists put the beams into collision for the first time in the early morning of 17 November 2015 and ‘stable beams’ were declared at 10.59am today, marking the start of a one-month run with positively charged lead ions: lead atoms stripped of electrons. The four large LHC experiments will all take data over this campaign, including LHCb, which will record this kind of collision for the first time. Colliding lead ions allows the LHC experiments to study a state of matter that existed shortly after the big bang, reaching a temperature of several trillion degrees.
Geneva, 29 October 2015. This week more than 230 scientists and engineers from around the world met at CERN1 to discuss the High-Luminosity LHC – a major upgrade to the Large Hadron Collider (LHC) that will increase the accelerator’s discovery potential from 2025.
Geneva, 12 October 2015. CERN1 has today announced three new open calls giving a chance to artists to immerse themselves in the research of particle physics and its community. Two new international partners have joined the Accelerate @ CERN programme: the Abu Dhabi Music & Arts Foundation (ADMAF) from UAE2 and Rupert, the centre for Art and Education from Vilnius, Lithuania3. The Collide @ CERN Geneva award is also now calling for entries, continuing the fruitful collaboration with The Republic and Canton of Geneva and the City of Geneva4.
Geneva, 18 September 2015. CERN1 Council today announced the election of Professor Sijbrand de Jong as its 22nd President for a period of one year renewable twice, with a mandate starting on 1 January 2016. He will take over from Professor Agnieszka Zalewska who concludes her three-year term at the end of December.