Particle Physics
A new device using a laser-held bead has enabled the first direct measurement of pressure exerted by individual particles. Developed by researchers at Yale University, the tool could advance studies in extreme vacuums and help search for elusive particles like sterile neutrinos.
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An international team of researchers has detected signs of a rare η′-mesic nucleus, a fleeting particle trapped inside an atomic nucleus. This exotic state, observed in a high-precision experiment, suggests the η′ meson's mass decreases in dense nuclear matter. The finding could shed light on how matter acquires mass through the structure of space's vacuum.
Physicists at MIT have developed a new method using molecules to investigate the interior of atomic nuclei, employing electrons as messengers in a tabletop setup. By studying radium monofluoride, they detected subtle energy shifts indicating electron interactions inside the nucleus. This approach could help explain the universe's matter-antimatter imbalance.
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Researchers have made progress in identifying a critical point where the strong nuclear force weakens, allowing quarks and gluons to form a hot plasma. By analyzing collisions at a New York particle accelerator, scientists have narrowed the possible location of this point on a phase diagram. This finding could reveal insights into the early universe and neutron stars.