Today at Berkeley Lab

Dark Matter Day Talk at Chabot Space and Science Center

Chabot Space and Science Center and Berkeley Lab are hosting a Dark Matter Day talk on Sunday, Oct. 29, from 2 to 3:30 p.m. Visitors will learn how scientists and researchers are using accelerators and underground detectors to hunt for the mysterious particles that make up dark matter. Speakers include Lab physicists Heather Gray, Zachary Marshall, and Dan McKinsey. More>

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The Physicist’s Guide to the Universe

An article in the CERN Courier recognizes the Particle Data Group’s contributions to particle physics over the past 60 years. The story chronicles how PDG grew out of a 1957 article co-authored by the Lab’s Art Rosenfeld to become an international collaboration, led by the Lab, whose comprehensive Review of Particle Physics is popularly known as the “bible of particle physics.”

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Physics Division Hosts Talk on Gravitational Waves From a Neutron-Star Merger

Jocelyn Read, a professor at Cal State Fullerton and member of LIGO, will present a talk on “GW170817: Gravitational Waves From a Neutron-Star Merger” on Wednesday, Oct. 18, at 3:30 p.m. in the Building 50 Auditorium. It will be streamed live.

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Light From Neutron Star Merger Helps Decode Origin of Heavy Elements

On Aug. 17, scientists around the world were treated to near-simultaneous observations by separate instruments: One set of Earth-based detectors measured the signature of a cataclysmic event sending ripples through the fabric of space-time, and another detected the gamma-ray signature of a high-energy outburst emanating from the same region of the sky. More>

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Three Lab Researchers Elected as American Physical Society Fellows

Christian Bauer (Physics Division), Bill Collins (Earth and Environmental Sciences Area), and Ernst Paul Sichtermann (Nuclear Science Division) are among the recipients of 2017 APS fellowships. Lab-affiliated researchers who received fellowships via UC Berkeley include Daniel McKinsey and Yasunori Nomura (Physics Division), and Dan Kasen (Nuclear Science). Go here for a complete list of fellows and their citations.

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‘Looking for the Invisible’ Dark Matter Presentation at Nerd Nite SF

Berkeley Lab physicist Lucie Tvrznikova, who is working on the deep-underground search for dark matter particles, will join other speakers for a fun evening of science known as “Nerd Nite SF” on Wednesday, Oct. 18. The program begins at 8 p.m. at the Rickshaw Stop (155 Fell St. at Van Ness) in San Francisco. Tickets are $8 and can be purchased here.

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The Mystery of the Lightweight Electrons

When electrons propagate in an ordered solid-state material, they are scattered by defects, lattice vibrations, and other electrons. This has the effect of making the electrons seem as though they are heavier than non-interacting electrons (i.e., electrons described by density functional theory). Now, researchers have discovered a system in which this common tenet of many-body theory is violated. More>

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DOE Podcast Explores Dark Matter Mystery

The latest episode of “Direct Current,” a podcast series produced by the Department of Energy, highlights dark matter-hunting experiments like the next-gen LUX-Zeplin (LZ) experiment. Berkeley Lab is overseeing the construction of LZ at an underground site in South Dakota. More>

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Postdoc Appreciation Week: 10 Things to Know About Ben Nachman

A researcher with the ATLAS group in the Physics Division, Nachman has learned to love peanut butter and onion sandwiches, had a very scientific setting for his wedding, and ran a marathon in a very unusual place. Go here to learn more about Ben Nachman. Read about postdoc Tetiana Shalapska tomorrow. Are there 10 things we should know about you or a colleague? Send email here.

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DOE 40th Anniversary Milestone: Expansion of Universe is Speeding Up

Scientists assumed the universe’s expansion was slowing down as gravity pulled debris from the Big Bang back together. But in 1999 Saul Perlmutter and others discovered the universe’s expansion is speeding up, driven by an unknown cause referred to as “dark energy.” They used measurements from Type 1a supernovae, which all reach maximum brightness when they explode. More>

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