Groups of three quarks form stable composite particles called baryons (such as protons and neutrons), while pairs of quarks form unstable mesons. New measurements from the Large Hadron Collider beauty (LHCb) experiment show surprising variations in the rate at which baryons are produced, defying previous expectations.
Today, the U.S. Department of Energy (DOE) announced the issuance of a Request for Proposals (RFPs) for the competitive selection of a management and operating contractor for the Thomas Jefferson National Accelerator Facility (TJNAF).
Five early and mid-career scientists from Argonne National Laboratory divide and conquer varied challenges to improve nuclear science and technology and help the U.S. meet its future energy goals.
Theorists have performed the first systematic study of whether and how the viscosity of quark gluon plasma from heavy nuclei collisions changes over a wide range of collision energies. The calculations predict that the fluid’s viscosity increases with net-baryon density. The results will help researchers probe the entire phase diagram of nuclear matter.
The safety and efficiency of a large, complex nuclear reactor can be enhanced by hardware as simple as a tiny sensor that monitors a cooling system. That’s why researchers at the Department of Energy’s Oak Ridge National Laboratory are working to make those basic sensors more accurate by pairing them with electronics that can withstand the intense radiation inside a reactor.
The MOLLER experiment has received Critical Decision 2 “Approve Performance Baseline” and Critical Decision 3 “Approve Start of Construction” from the Department of Energy, which provides clearance to move forward with all procurements and equipment construction.
The way protons and neutrons move between two nuclei is key to understanding the processes in low-energy nuclear fusion reactions. As the nuclei draw close enough for the nuclear forces to become effective, neutrons and protons can migrate from one nucleus to another, potentially easing the fusion process.
Jefferson Lab Staff Scientist Holly Szumila-Vance earns the 2024 Guido Altarelli Award for outstanding contributions to experimental physics.
Nuclear physicists have long been working to reveal how the proton gets its spin. Now, a new method that combines experimental data with state-of-the-art calculations has revealed a more detailed picture of spin contributions from the very glue that holds protons together.
Splash a few drops of water on a hot pan and if the pan is hot enough, the water will sizzle and the droplets of water seem to roll and float, hovering above the surface.
For the first time, nuclear physicists made precision measurements of the short-lived radioactive molecule, radium monofluoride (RaF). The researchers combined ion-trapping and specialized laser systems to measure the fine details of the quantum structure of RaF. This allowed them to study the rotational energy levels of RaF and determine its laser-cooling scheme.
Scientists have uncovered the properties of a rare earth element that was first discovered 80 years ago at the very same laboratory, opening a new pathway for the exploration of elements critical in modern technology, from medicine to space travel.
Jefferson Lab Director Stuart Henderson has been named to the 2024 Hampton Roads Power List, compiled by Inside Business. This is Henderson’s 6th appearance on the list.
Scientists have the first direct evidence that the powerful magnetic fields created in off-center collisions of atomic nuclei induce an electric current in “deconfined” nuclear matter. The study used measurements of how charged particles are deflected when they emerge from the collisions. The study provides proof that the magnetic fields exist and offers a new way to measure electrical conductivity in quark-gluon plasma.
Two physicists at Jefferson Lab have been selected as fellows for the distinguished Oppenheimer Science and Energy Leadership Program (OSELP), considered the highest honor for leadership training among national labs.
The U.S. Department of Energy (DOE) has approved Critical Decision 3A (CD-3A) — the go-ahead for long-lead procurements — for the Electron-Ion Collider (EIC). EIC is a state-of-the-art particle collider for nuclear physics research that will be located at DOE's Brookhaven National Laboratory and built in partnership with DOE's Thomas Jefferson National Accelerator Facility (Jefferson Lab).
Entanglement entropy quantifies the amount of entanglement between two subsystems. In many systems, the entanglement entropies increase as the area that separates them from their environment increases.
When scientists collide heavy nuclei, the constituent quarks and gluons melt into a quark-gluon plasma.
Argonne’s enhanced NERDE data explorer provides community leaders with insights into local economic distress, employment and gross domestic product, local industry clusters, climate risk, and innovation to inform economic resilience planning.
Dissecting doorbells, exploring music, mastering retail software, love of the arts and old-fashioned hard work were early paths that led five Sandia National Laboratories engineers to their callings and recently earned them national Black Engineer of the Year Awards.
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