Anne-Isabelle Etienvre, director of the fundamental research division of CEA, and Asmeret Asefaw Berhe, director of the DOE Office of Science, sign an official "Statement of Interest" to launch what both agencies hope will be a significant collaboration on the Electron-Ion Collider. (X.Coppolani/CEA)
French and U.S. Science Agencies Take First Step to Collaborate on Electron-Ion Collider (EIC)
Representatives from the U.S. Department of Energy’s (DOE) Office of Science and the French Alternative Energies and Atomic Energy Commission (CEA) have signed a “Statement of Interest” to launch what both agencies hope will be a significant collaboration on the Electron-Ion Collider (EIC). The EIC, being built in the U.S. at DOE’s Brookhaven National Laboratory in partnership with DOE’s Thomas Jefferson National Accelerator Facility (Jefferson Lab), will be a unique facility for exploring the building blocks of matter and the strongest force in nature. The agreement continues a long history of cooperation in scientific endeavors between the governments of France and the U.S. and is a first step toward forging stronger collaborative ties and future French contributions to the EIC.
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Kavli IPMU's new Director Jun'ichi Yokoyama (Credit: Kavli IPMU)
Jun'ichi Yokoyama Named Director of Kavli IPMU
On November 1, theoretical physicist Jun'ichi Yokoyama was welcomed as the third Director of the Kavli Institute for the Physics and Mathematics of the Universe (WPI-Kavli IPMU). Jun'ichi Yokoyama has been a central figure in the research community in Japan, leading international research efforts into cosmology of the early Universe, large-scale structure evolution, and gravitational wave physics.
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Interactions.org launches a new podcast “Particle Mysteries: The Coldest Case” explores the mystery of dark matter
The nature of matter in our universe has left scientists puzzled for decades. There seems to be more than meets the eye—significantly more—yet the answer remains a mystery. To mark Dark Matter Day, the Interactions Collaboration is opening a file on “Particle Mysteries: The Coldest Case,” a dark matter mystery-style podcast series that follows the decades-long search for dark matter, the mysterious substance that dominates our universe, leaving visible traces while evadings detection.
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Insertion of the ALPHA-g apparatus (Image: CERN)
ALPHA experiment at CERN observes the influence of gravity on antimatter
Isaac Newton's historic work on gravity was apparently inspired by watching an apple fall to the ground from a tree. But what about an “anti-apple” made of antimatter, would it fall in the same way if it existed? According to Albert Einstein’s much-tested theory of general relativity, the modern theory of gravity, antimatter and matter should fall to Earth in the same way. But do they, or are there other long-range forces beyond gravity that affect their free fall?
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The ATLAS experiment at CERN (Image: CERN)
ATLAS measures strength of the strong force with record precision
Binding together quarks into protons, neutrons and atomic nuclei is a force so strong, it’s in the name. The strong force, which is carried by gluon particles, is the strongest of all fundamental forces of nature – the others being electromagnetism, the weak force and gravity. Yet, it’s the least precisely measured of these four forces.
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Join the world’s laboratories to celebrate the global search for dark matter
Dark Matter Day, an international event, aims to shed light on that mystery through a series of events held on and around Halloween. These events, set to begin in late October and run through the end of the year, will highlight the global search for dark matter, the many fascinating ways scientists search for this elusive substance, and the value of devoting scientific resources to unraveling this cosmic riddle.
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Announcement on the Selection Results of Candidates for the Next Director General of KEK
On September 8, 2023, Professor Shoji Asai, Director of International Center for Elementary Particle Physics (ICEPP), the University of Tokyo, was selected by the Selection Committee for the Director General of KEK, as the candidate for the next Director General of KEK.
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The announcement on Aug. 10, 2023 is the second result from the experiment at Fermilab and is twice as precise than the first result announced on April 7, 2021. Zani Semovski, Anna Driutti, Matt Bressler, Fatima Rodriguez are part of the Muon g-2 collaboration pictured below working on the experiment. Photo: Ryan Postel, Fermilab
Muon g-2 doubles down with latest measurement, explores uncharted territory in search of new physics
Physicists now have a brand-new measurement of a property of the muon called the anomalous magnetic moment that improves the precision of their previous result by a factor of 2.
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The PXD, which is about the size of a beverage can, comprises 20 modules, each made of 75-micrometre-thin silicon strands. (Photo: KEK)
Made in Germany: World’s thinnest pixel vertex detector installed in Japan
The Pixel Vertex Detector, which is about the size of a soda can and is the innermost sub-detector of the international experiment Belle II, has been successfully installed at its final location at the SuperKEKB electron–positron collider at the KEK laboratory in Japan. The device, which is designed to detect the signals of certain particle decays that could shed light on the origin of the observed imbalance of matter and antimatter in the universe, has ventured a long way over a long time from its production site in Munich to its final destination in Japan.
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Shohini Bhattacharya, a physicist in Brookhaven Lab's nuclear theory group and the RIKEN BNL Research Center (RBRC), helped to develop a new formalism that gives access to the distribution of quarks and gluons within a proton. The group used this approach to predict the spatial distributions of charges, momentum, and other properties of "up" and "down" quarks within protons.
Calculations Reveal High-Resolution View of Quarks Inside Protons
A collaboration of nuclear theorists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory, Argonne National Laboratory, Temple University, Adam Mickiewicz University of Poland, and the University of Bonn, Germany, has used supercomputers to predict the spatial distributions of charges, momentum, and other properties of “up” and “down” quarks within protons. The results, just published in Physical Review D, revealed key differences in the characteristics of the up and down quarks.
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Celebrate Dark Matter Day
On and around October 31st, 2023, the world will celebrate the historic hunt for the unseen—something that scientists refer to as dark matter.
Since 2017, more than 350 global, regional, and local events have been held on and around October 31 by institutions and individuals looking to engage the public in discussions about what we already know about dark matter and the many experiments seeking to solve its mysteries.