particle-physics

Researchers precisely measured the proton’s size, resolving the proton radius puzzle and strengthening confidence in the Standard Model of particle physics. Hydrogen is the simplest element in the universe and the first entry on the periodic table. Each hydrogen atom contains just one proton in its nucleus and one electron orbiting around it. Because of [...]

Scientists have developed a new particle detector that can measure incredibly short bursts of electrons lasting just one trillionth of a second, or one picosecond. The breakthrough could help next-generation particle accelerators reveal how materials, chemicals and biological systems behave at the atomic level. The new detector was created by the Advanced Accelerator Diagnostics Collaboration, [……

Motivation Standard derivation of the LSZ reduction formula often rely on the assumption of an "in" or "out" free-field limit from the outset. While elegant, this approach can obscure the connection between the actual dynamics of the interacting field [itex]\varphi(x)[/itex] and the... Read more

The new particle, composed of one strange quark and two charm quarks, completes a set of particles first theorised over half a century ago. Written by: Rory Harris. —

Physicists with LHCb Collaboration at CERN’s Large Hadron Collider (LHC) have detected the elusive Ωcc⁺ baryon, a particle containing two charm quarks and one strange quark, completing a long-sought family of doubly charmed baryons first predicted over half a century ago. The post CERN Physicists Discover Third and Final Member of Doubly Charmed Baryon Family appeared first on Sci.News: Breaking …

Two Department of Physics and Astronomy postdoctoral research associates and a staff member were recognized in June with CMS awards by CERN. These annual awards highlight the essential work done in detector operations, software development, data analysis, and overall collaboration efforts. The dedication…

How a tabletop experiment with ultracold strontium demonstrated the key measurement principle behind future searches for dark matter and gravitational waves, revealing how correlated atom interferometers can recover a clean signal even when each individual measurement appears lost in noise.

Plausible answers range from 17 to — in all seriousness — 995.5.

Physicists have found that splitting a photon would lead to a complex state that may change the way we think of particles.

Nature, Published online: 16 June 2026; doi:10.1038/d41586-026-01939-1 Estimates range from 17 to 995.5. Plus, one man with paralysis is using a brain– computer interface at home and GLP-1 obesity drugs appear to boost testosterone and sperm quality.

Scientists studying particle collisions at the Relativistic Heavy Ion Collider (RHIC) usually capture what happens when atomic nuclei smash into one another at nearly the speed of light. But even when the nuclei don't collide, interesting things can happen. In a new paper just published in Physical Review Letters, members of RHIC's STAR collaboration describe a new way to use near-miss collisions…

The 2026 Breakthrough Prize honors the Muon g-2 collaboration at CERN and the U.S. Department of Energy's Brookhaven National Laboratory and Fermi National Accelerator Laboratory, including contributions from Argonne National Laboratory.

In 2003, physicists detected a particle known as the Ds(2317) meson, containing one charm quark and one strange antiquark. That discovery garnered significant attention because of a large discrepancy between the particle’s measured mass (2.317 GeV/c2) and its predicted mass (above 2.4 GeV/c2). Now the Belle and Belle II Collaboration has observed a previously unseen […]

杨-米尔斯规范场论是粒子物理标准模型的核心数理框架，但规范群SU(3)×SU(2)×U(1)的选取缺乏第一性原理的择优判据，希格斯机制无法解释对称性自发破缺与质量间隙的底层约束逻辑。本文基于《好奇本源》公理体系与认知相空间数理框架，引入认知信息几何择优原理，建立认知约束与规范场论耦合的有效作用量框架。基于认知系统三重基础约束，提出规范群筛选判据，论证SU(3)×SU(2)×U(1)是满足全部约束的最小、信息编码成本最低的规范群组合。依托本耦合框架，给出对称性自发破缺与质量间隙的认知信息几何解释，同时提出可证伪的实验观测预言。本工作搭建认知演化公理与微观规范场论对话的统一范式，为标准模型底层参数溯源提供全新研究方向。 The Yang-Mills gauge field theory serves as the core mathematical framework of the Stan…

Discussion of spectral triples over Jordan algebras in the Connes-Lott model: The standard model, the Pati-Salam model, and “Jordan geometry” [arxiv:1910.11888] On the Albert algebra and potential relation to the gauge group of the standard model of particle physics: On the Penrose tiling in relation to quantum error correcting codes:

This paper proves a downstream AASC constraint-theoretic proton-stability theorem, conditional on the locked AASC Standard-Model structural-recovery and occupantuniqueness results. Proton decay is treated as a proposed standing-bearing transition role, not as a proton-lifetime parameter, numerical correction, or missing coefficient in an otherwise fixed table. The target domain is the unique AASC…

JUNO’s first results have launched a new era of precision neutrino physics and brought scientists closer to solving the neutrino mass mystery. The Jiangmen Underground Neutrino Observatory (JUNO) has achieved its first major scientific milestone. On June 10, its debut physics result was featured as a cover article in Nature. Using 59 days of high-quality [...]

By day American physicist Kenneth Long works with the world’s largest particle accelerator, the Large Hadron Collider at CERN near Geneva. He wants to better understand the W boson, a subatomic particle that is responsible for some kinds of radioactivity and for fusion. But he also likes bikes, and this July you might find him on a scenic roadside, cheering on competitors in the Tour de France. H…

Norbert Holtkamp is a physicist and science administrator who has served as director of the Fermi National Accelerator Laboratory (Fermilab) since January 2026. He previously held senior leadership roles at the SLAC National Accelerator Laboratory and the ITER fusion project, where he focused on large-scale accelerator and scientific infrastructure development. [This interview was edited for leng…

Antihydrogen, the bound state of a positron and an antiproton, is the only pure anti-atomic system ever studied. It is produced exclusively in the laboratory, as it has never been observed in nature. This unique system is of great interest for searching for tentative differences between matter and antimatter. Antihydrogen has been routinely trapped since 2010 and accumulated since 2017, enabling,…