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CUORE Team Places New Limits on the Bizarre Behavior of Neutrinos

Researchers at the Cryogenic Underground Observatory for Rare Events (CUORE) announced this week that they had placed some of the most stringent limits yet on the strange possibility that the neutrino is its own antiparticle. CUORE has spent the last three years patiently waiting to see evidence of a distinctive nuclear decay process, only possible if neutrinos and antineutrinos are the same particle. Their new data shows that this decay doesn’t happen for trillions of trillions of years, if it happens at all.

Berkeley Lab Researchers, Computational Facilities Play Key Role in Barrier-Breaking Neutrino Mass Measurement

An international research team that includes Lawrence Berkeley National Laboratory (Berkeley Lab) scientists has established a new upper limit of 0.8 electron volts (eV) for the mass of the neutrino, a milestone that will bear on future discoveries in nuclear and particle physics, and cosmology.

Fiber Lasers Poised to Advance Berkeley Lab’s Development of Practical Laser-Plasma Accelerators

Berkeley Lab researchers have zeroed in on the limitations of laser-plasma particle accelerator (LPA) development efforts and believe they have found a new path forward with optical fiber lasers. A new approach to high-power lasers – combining the pulses from many fast-acting but lower-energy optical fiber lasers – will energize these super-compact accelerators.

Missing Baryons Found in Far-Out Reaches of Galactic Halos

Researchers have channeled the universe’s earliest light – a relic of the universe’s formation known as the cosmic microwave background (CMB) – to solve a missing-matter mystery and learn new things about galaxy formation. Their work could also help us to better understand dark energy and test Einstein’s theory of general relativity by providing new details about the rate at which galaxies are moving toward us or away from us.

U.S. Magnet Development Project for CERN Particle Collider Upgrade Moves Forward

The U.S. Department of Energy has formally approved a key milestone in the High-Luminosity LHC Accelerator Upgrade Project being carried out at eight U.S. institutions, including the DOE’s Berkeley Lab.

Tantalizing Signs of Phase-change ‘Turbulence’ in RHIC Collisions

A new analysis of collisions conducted at different energies, with contributions by Berkeley Lab scientists, shows tantalizing signs of a critical point – a change in the way that quarks and gluons, the building blocks of protons and neutrons, transform from one phase to another.

Researchers Hunt for New Particles in Particle Collider Data

Berkeley Lab researchers participated in a study that used machine learning to scan for new particles in three years of particle-collision data from CERN’s ATLAS detector.

Applying Quantum Computing to a Particle Process

A team of researchers at Berkeley Lab used a quantum computer to successfully simulate an aspect of particle collisions that is typically neglected in high-energy physics experiments, such as those that occur at CERN’s Large Hadron Collider.

Study: X-Rays Surrounding ‘Magnificent 7’ May Be Traces of Sought-After Particle

A new study, led by a theoretical physicist at Berkeley Lab, suggests that never-before-observed particles called axions may be the source of unexplained, high-energy X-ray emissions surrounding a group of neutron stars.

Scientists Say Farewell to Daya Bay Site, Proceed with Final Data Analysis

The Daya Bay Reactor Neutrino Experiment collaboration – which made a precise measurement of an important neutrino property eight years ago, setting the stage for a new round of experiments and discoveries about these hard-to-study particles – has finished taking data. Though the experiment is formally shutting down, the collaboration will continue to analyze its complete dataset to improve upon the precision of findings based on earlier measurements.