particle-physics
6 stories related to this topic, newest first.
ghacks.netDevice Measures Pressure from Single Particle Collisions Using Levitated Silica Sphere
Researchers at Yale University built the first device capable of measuring pressure produced by an individual particle. The instrument uses a 100-nanometre silica sphere held in place by laser light and could help establish new definitions for ultra-high vacuum and detect hypothe…
New ScientistPhysicists Propose Reviving 1773 Cavendish Experiment to Search for Millicharged Dark Matter
Peter Graham at Stanford University and colleagues suggest updating Henry Cavendish’s nested metal shell experiment from 1773 to search for millicharged particles as dark matter candidates. The setup would cost under a million dollars and could prove far more sensitive than some…
Substrate placeholder — needs reviewResearchers Trace Origins of Short-Lived Particle to Support Vacuum Fluctuations as Source of Mass
Scientists have analyzed the origins of a short-lived particle known as a top quark. Their findings provide evidence that mass arises from fluctuations in the quantum vacuum. The study was reported by New Scientist.
Substrate placeholder — needs reviewNew Measurement of W Boson Mass Aligns with Standard Model of Particle Physics
Researchers have measured the mass of the W boson at 80.360 ± 0.008 GeV, consistent with predictions from the standard model. This result comes from data collected by the ATLAS detector at CERN's Large Hadron Collider. The finding contradicts a 2022 measurement from the Fermilab…
Substrate placeholder — needs reviewPhysicists Propose Exploding Primordial Black Holes Explain Matter-Antimatter Asymmetry
Researchers suggest that tiny primordial black holes formed shortly after the Big Bang exploded and produced shock waves that favored matter over antimatter in the early universe. These black holes, with masses around 1,000 kilograms, would have evaporated via Hawking radiation w…
Substrate placeholder — needs reviewTwo Precise Experiments Confirm Earlier Measurement of Proton Radius
Two recent experiments have produced results consistent with a 2010 measurement of the proton's radius that initially diverged from prior values. The proton radius determines the size of atomic nuclei and influences fundamental physics calculations. These findings, reported by Ne…