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World’s Most Sensitive Dark Matter Detector Completes Search

The LZ water shield, currently housing the LUX experiment.

The Large Underground Xenon (LUX) dark matter experiment, which, with the help of Berkeley Lab researchers, operates beneath a mile of rock at the Sanford Underground Research Facility in the Black Hills of South Dakota, has completed its search for the missing matter of the universe. At a meeting in the UK, LUX scientific collaborators presented the results from the detector’s final 20-month run.

Dark Energy Measured with Record-Breaking Map of 1.2 Million Galaxies

This is one slice through the map of the large-scale structure of the Universe from the Sloan Digital Sky Survey and its Baryon Oscillation Spectroscopic Survey. Each dot in this picture indi-cates the position of a galaxy 6 billion years into the past. The image covers about 1/20th of the sky, a slice of the Universe 6 billion light-years wide, 4.5 billion light-years high, and 500 million light-years thick. Color indicates distance from Earth, ranging from yellow on the near side of the slice to purple on the far side. Galaxies are highly clustered, revealing superclusters and voids whose presence is seeded in the first fraction of a second after the Big Bang. This image contains 48,741 galaxies, about 3% of the full survey dataset. Grey patches are small regions without survey data. Credit: Daniel Eisenstein and SDSS-III

A team of hundreds of physicists and astronomers, including those from Berkeley Lab, have announced results from the largest-ever, three-dimensional map of distant galaxies. The team constructed this map to make one of the most precise measurements yet of the dark energy currently driving the accelerated expansion of the Universe.

Most Precise Measurement of Energy Range for Particles Produced by Nuclear Reactors Reveals Surprises

A view inside the particle detectors at Daya Bay, where photomultiplier tubes measure signals from antineutrinos. (Photo credit: Roy Kaltschmidt)

An international team that includes researchers from Berkeley Lab has captured the most precise—and puzzling—energy measurements yet of ghostly particles called reactor antineutrinos produced at a nuclear power complex in China.

New Results from World’s Most Sensitive Dark Matter Detector

A view inside the LUX detector. (Photo by Matthew Kapust/Sanford Underground Research Facility)

A new set of calibration techniques employed by LUX scientists has again dramatically improved the detector’s sensitivity.

Supernova Twins: Making Standard Candles More Standard Than Ever

Supernova Factory group (SN factory) - Greg Aldering, Kyle Boone, Hannah Fakhouri and Saul Perlmutter.

Type Ia supernovae are bright “standard candles” for measuring cosmic distances. Standard enough to discover dark energy, they’re far from identical. Researchers at the Berkeley Lab-based Nearby Supernova Factory have shown that supernova twins with closely matching spectra double the accuracy of distance measures.

2015 Nobel Prize in Physics Has Berkeley Lab Roots

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Berkeley Lab scientists and engineers played important roles in the design and construction of SNO – the Sudbury Neutrino Observatory – as well as subsequent data analysis that contributed to the 2015 Nobel Prize in Physics awarded to Canada’s Arthur McDonald.

National Security on the Move with High Energy Physics

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Scientists are developing new technology that will safely and quickly detect nuclear material in large objects such as cargo containers.

For Ultra-cold Neutrino Experiment, a Successful Demonstration

Bottom view of a CUORE tower. Credit: CUORE Collaboration

An international team of nuclear physicists announced the first scientific results from the Cryogenic Underground Observatory for Rare Events (CUORE) experiment. CUORE is designed to confirm the existence of the Majorana neutrino, which scientists believe could hold the key to why there is an abundance of matter over antimatter.

Berkeley Lab Scientists Recipients of 2015 Breakthrough Prizes

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Berkeley Lab astrophysicist Saul Perlmutter and biochemist Jennifer Doudna were among the featured recipients of the 2015 Breakthrough Prizes in Fundamental Physics and Life Sciences.

Hide & Seek: Sterile Neutrinos Remain Elusive

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The Daya Bay Collaboration, an international group of scientists studying the subtle transformations of subatomic particles called neutrinos, is publishing its first results on the search for a so-called sterile neutrino, a possible new type of neutrino beyond the three known neutrino “flavors,” or types.