Announcement on the Selection Results of Candidates for the Next Director General of KEK
KEK announces that on September 3, 2026, the Director General Selection Committee of KEK selected Dr. Shoji Asai, the current Director General of KEK, as the candidate for the next Director General. His second term of office will be three years, from April 1, 2027, to March 31, 2030.
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Figure 1: Conceptual diagram of positive muon cooling and acceleration. Cooling the positive muons, whose directions and velocities are initially spread out, enabled efficient radio-frequency acceleration.
Muon Acceleration: From Demonstration to Implementation - Cooled muons accelerated to 0.3 MeV in the new dedicated experimental area -
At the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC, *1), muons were cooled from a kinetic energy of 4 MeV down to 25 meV (a reduction by a factor of about 160 million) and then accelerated to 0.3 MeV (approximately 8% of the speed of light) in the new experimental area dedicated to muon acceleration (Muon H2 Area, *2). Compared with the world's first demonstration of muon acceleration in 2024, this represents three times the energy and 200 times the intensity (approximately 10 muons per second). This achievement marks an important step toward the operation of the world's only muon accelerator.
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The LUX-ZEPLIN main detector in a surface lab before installation underground. (Credit: Matthew Kapust/Sanford Underground Research Facility)
LZ Sees Surprising Result in Search for Dark Matter
For the better part of a century, people have been trying to understand dark matter. This invisible substance makes up roughly 85% of the mass in the universe but has never been directly detected. Determining exactly what it is remains one of the biggest questions about our world.
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XENONnT: First Measurement of Low-Energy Solar Neutrinos Scattering off Electrons
Every second, tens of billions of neutrinos produced by nuclear fusion in the Sun pass through every square centimetre of the Earth—and through our bodies—almost without interacting. Although they are one of the most abundant particles emitted by the Sun, their extremely weak interactions make the detection of these elusive particles one of the greatest experimental challenges in particle physics.
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A cutout of SPT-3G data (left) showing microwave signals, alongside a map (right) with colorful boxes marking confirmed galaxy clusters detected in the same region. These maps represent approximately 0.5% of the main field survey area. (Image by SPT-3G Collaboration/Argonne National Laboratory.)
South Pole Telescope analysis yields catalog of more than 7,000 galaxy clusters
An Argonne-led research team has released a catalog of more than 7,000 confirmed galaxy clusters from five years of South Pole Telescope data, opening a powerful new window into the large-scale structure and evolution of the universe.
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The LHC is currently shut down. Teams will now dismantle 1.2 kilometres of the accelerator to install the new HiLumi LHC equipment. This will be connected to the equipment installed in the new HiLumi LHC galleries, such as the new cryogenic line, sections of which were delivered last spring (Image: CERN)
CERN bids farewell to the LHC and enters Long Shutdown 3
Today, the Large Hadron Collider (LHC), the world’s most powerful particle accelerator, comes to the end of an extraordinary chapter in its scientific journey. Following its final physics run, the accelerator has been switched off to begin CERN’s Long Shutdown 3 (LS3), a major programme of maintenance, consolidation, upgrades and installation work that will prepare the Laboratory for the High-Luminosity LHC (HiLumi LHC), the next phase in the exploration of the fundamental laws of nature.
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View of the CLOUD experiment (image: CERN)
CLOUD experiment uncovers a major new source of marine aerosol particles
In a paper published today in the journal Nature, the CLOUD Collaboration at CERN reports that natural emissions from phytoplankton are producing far more aerosol particles than previously thought, changing our understanding of aerosols and clouds in pristine climates from before the industrial era and after the fossil fuel era
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CERN’s impact extends far beyond the boundaries of fundamental research, from education to collaboration between nations, and including applications for space, medicine, energy and electronics (Credit: CERN, Mars Bioimaging and Axiom Space)
New study highlights CERN’s socio-economic contributions as a global research hub
The newly published study Assessment of the socio-economic benefits of CERN activities reports on CERN’s activities over the past 25 years and highlights a range of socio-economic benefits generated by the Laboratory’s role as a global hub for science, technology and collaboration.
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Request for Nomination of Candidates for the Next Director of J-PARC Center
The J-PARC Center, which is jointly operated by the Japan Atomic Energy Agency (JAEA) and the High Energy Accelerator Research Organization (KEK), invites nomination of candidates for the next Director for the term starting on April 1, 2027. For the details of J-PARC and J-PARC Center, please visit our website at https://www.j-parc.jp/c/en/.
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