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New Results from Daya Bay – Tracking the Disappearance of Ghostlike Neutrinos

By Guest PostOctober 7, 2013Scienceacrylic vessel, antineutrinos, Beijing, berkeley lab, beta beams, China, daya bay, daya bay collaboration, disappearance, electron, electron neutrinos, evolution of universe, ghostlike neutrinos, hong kong, jim siegrist, kam biu luk, kamland, ling ao, liquid holding, mass hierarchy, mass splitting, millions of quadrillions, minos, muon, neutrino energy, neutrino oscillations, south dakota, steve kettell, super beams, tau, universe

Daya Bay neutrino experiment releases high-precision measurement of subatomic shape shifting and new result on differences among neutrino masses

The international Daya Bay Collaboration has announced new results about the transformations of neutrinos – elusive, ghostlike particles that carry invaluable clues about the makeup of the early universe. The latest findings include the collaboration’s first data on how neutrino oscillation – in which neutrinos mix and change into other “flavors,” or types, as they travel – varies with neutrino energy, allowing the measurement of a key difference in neutrino masses known as mass splitting.

“Understanding the subtle details of neutrino oscillations and other properties of these shape-shifting particles may help resolve some of the deepest mysteries of our universe,” said Jim Siegrist, Associate Director of Science for High Energy Physics at the U.S. Department of Energy (DOE), the primary funder of U.S. participation in Daya Bay. (more…)

Fast Times in Physics

By Guest PostNovember 29, 2011Scienceatomic clocks, beams of neutrinos, c, Chicago, einstein, equation, Europe, faster than light, fermilab, Japan, marvin marshak, minos, neutrinos, northern minnesota, opera, physicists, scientific world, soudan underground laboratory, speed of light, subatomic particles, time, university of minnesota, vacuum, vibrations of cesium atoms

A U physicist will help determine if neutrinos can outrace light

Back in 2007, a physics experiment clocked elusive subatomic particles called neutrinos going faster than light.

That wasn’t supposed to happen. If the speed of light in a vacuum—denoted “c” by physicists—isn’t the universal speed limit, it would mean that Einstein put the wrong number in his famous E=mc² equation.

University of Minnesota physicist Marvin Marshak was part of the experiment, called MINOS. It clocked beams of neutrinos shot from Fermilab, a national physics lab near Chicago, to a detector 457 miles away in the Soudan Underground Laboratory in northern Minnesota. (more…)

A “Jumping Gene’s” Preferred Targets May Influence Genome Evolution

By Guest PostSeptember 10, 2011Scienceallan spradling, baylor college of medicine, cell, chromosomes, DNA, dna duplication, drosophila, drosophila melanogaster, drosophila transposons, fruit fly, gene disruption project, gene function, genetic blueprint, genome duplication cycle, genome structure, hugo bellen, human cell, human genome, jumping genes, minos, model organisms, p element, piggybac, rogerhoskins, transposons

Baltimore, MD — The human genome shares several peculiarities with the DNA of just about every other plant and animal. Our genetic blueprint contains numerous entities known as transposons, or “jumping genes,” which have the ability to move from place to place on the chromosomes within a cell.

An astounding 50% of human DNA comprises both active transposon elements and the decaying remains of former transposons that were active thousands to millions of years ago before becoming damaged and immobile. If all of this mobile and formerly mobile DNA were not mysterious enough, every time a plant, animal or human cell prepares to divide, the chromosome regions richest in transposon-derived sequences, even elements long deceased, are among the last to duplicate. The reason for their delayed duplication, if there is one, has eluded biologists for more than 50 years. (more…)

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New Results from Daya Bay – Tracking the Disappearance of Ghostlike Neutrinos

Fast Times in Physics

A “Jumping Gene’s” Preferred Targets May Influence Genome Evolution