CERN Accelerating science

April-June 2026

A word from the EP Department Deputy Head - Summer 2026

I am very happy to introduce the summer 2026 edition of the EP newsletter.   Firstly, allow me to briefly introduce myself. I have started as the deputy department head of EP at the beginning of this year. Before that I have been a long-…

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CLOUD experiment reveals a major new source of marine aerosol particles

Clouds form when water vapour condenses onto tiny airborne particles known as aerosols. Once these particles grow larger than about 50 nanometres, they can act as cloud condensation nuclei, or CCN, on which cloud droplets form. Increased aerosol…

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New ATLAS and CMS searches close the gap for compressed higgsinos

Supersymmetry plays a prominent role in the landscape of models that push beyond the Standard Model. Higgsinos, the supersymmetric partners of the Higgs boson, may help in addressing a number of unsolved puzzles, particularly if their masses are…

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In discussion with John Ellis: The Higgs, Patience and Perseverance in Science

For John Ellis, the history of the Higgs boson is not a neat, short story that begins with a theory paper and ends with a discovery announcement. It is a long intellectual adventure, beginning in superconductivity, moving through the construction of…

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The ISOLDE Improvement Programme

The ISOLDE Improvement Programme (IIP) brings together a series of upgrades and consolidation activities to maintain and further develop the ISOLDE facility. The programme includes projects addressing the accelerator infrastructure, beam production…

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ATLAS Turns Into a Precision Cosmic Ray Laboratory

Event display of a proton-oxygen collision recorded in ATLAS Run 501640 on 1st July 2025 at 23:23:29 CEST. The event contains 19 reconstructed tracks (yellow lines) satisfying pT > 500 MeV with at least one Pixel hit and at least six SCT hits.…

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Light ions bring CMS closer to the onset of QGP-like behaviour

What are the smallest droplets of strongly interacting matter that exhibit colour deconfinement? This question has become one of the most intriguing frontiers in heavy-ion physics. At very high temperatures and densities, quantum chromodynamics…

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ALICE reveals quark-gluon plasma energy loss in OO collisions

A new state of matter Colliding heavy ions, such as lead, at nearly the speed of light in the LHC allows the creation of a new state of matter called the quark-gluon plasma (QGP). This near-perfect liquid of quarks and gluons is created because the…

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AI for Gravitational Waves: Building Bridges Between Scientific Communities

As gravitational-wave observatories enter a new phase of sensitivity, scale and scientific ambition, the challenge is no longer only to detect faint ripples in spacetime. It is also to analyse, interpret and respond to them fast enough to open new…

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Building a Microelectronics Foundation for Tomorrow’s Detectors

The challenge: smarter chips in harsher places Particle physics detectors have always pushed electronics to their limits. The next generation of tracking systems and calorimeters will depend critically on dense, intelligent, low power and radiation-…

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