Particle Physics News

Plasma Wakefield Acceleration Milestone

November 6, 2014

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Milestone Reached in Accelerating Particles with Plasma

Researchers hit a milestone in demonstrating the practicality of plasma wakefield acceleration, boosting bunches of electrons to energies 400 to 500 times higher than they could reach traveling the same distance in a conventional accelerator. Menlo Park, California — Scientists from the Department of Energy’s SLAC National Accelerator Laboratory and the University of California, Los […]

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Interactions between Cold Dark Matter and Radiation Leads to a Dramatic Reduction in Satellite Galaxies

September 9, 2014

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Interactions between Cold Dark Matter and Radiation

A newly published study from Durham University shows that interactions between cold dark matter and radiation leads to a dramatic reduction in the number of satellite galaxies, alleviating the Milky Way’s missing satellite galaxies problem and indicating that physics beyond gravity may be essential to making accurate predictions of structure formation on small scales. Scientists […]

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Physicists Reveal a Neutron Halo Around Neutron-Rich Magnesium Nuclei

August 29, 2014

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Physicists Reveal a Neutron Halo

Using the RIKEN Radioactive Isotope Beam Factory, physicists have revealed that the extra neutrons in a neutron-rich magnesium nucleus produce a neutron halo. Most stable atomic nuclei are made up of roughly an equal number of protons and neutrons. With the right equipment, however, physicists can create nuclei with many additional neutrons. These neutron-rich nuclei […]

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Superabsorption Can Be Achieved and Sustained in Simple Nanostructures

August 28, 2014

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Superabsorption of Light Via Quantum Engineering

Research from the University of Oxford establishes that superabsorption can be achieved and sustained in certain simple nanostructures, by trapping the system in a highly excited state while extracting energy into a non-radiative channel. The effect offers the prospect of a new class of quantum nanotechnology, capable of absorbing light many times faster than is […]

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Magneto-Optical Trapping of Strontium Monofluoride

August 21, 2014

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Physicists Chilled Molecules to Very Near to Absolute Zero

Using magneto-optical trapping, Yale physicists cooled molecules of strontium monofluoride to 2.5 thousandths of a degree above absolute zero, the lowest temperature yet achieved by direct cooling of a molecule. It’s official. Yale physicists have chilled the world’s coolest molecules. The tiny titans in question are bits of strontium monofluoride, dropped to 2.5 thousandths of […]

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New Measurements May Help Identify Antiquark’s Role in Proton’s Spin

August 13, 2014

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Particle Physicists Measure the Spin Contribution of Antiquark

Using the STAR detector at Brookhaven National Laboratory, scientists have identified a new method sensitive to the antiquark spin, which can shed light on where these quarks and antiquarks come from. This fundamental question has been a longstanding mystery in particle physics, although it was once thought that the answer would be fairly straightforward: The […]

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Supercomputer Simulations Open the Door for Numerical Modeling of Nuclear Interactions

July 25, 2014

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First Supercomputer Simulations of Spin Orbit Forces between Neutrons and Protons in an Atomic Nucleus

Researchers from RIKEN detail the first supercomputer simulations of ‘spin–orbit’ forces between neutrons and protons in an atomic nucleus, opening the door for numerical modeling of nuclear interactions. Protons and neutrons are held together at the center of an atom by powerful nuclear forces. A theory that can describe the interaction between just two of […]

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ATLAS Collaboration Detects Process Even Rarer Than Higgs Particle

July 17, 2014

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ATLAS Collaboration Detects Process Even Rarer than the Higgs Particle

A new published study from the ATLAS Collaboration reports the first evidence of a process that can be used to test the mechanism by which the recently discovered Higgs particle imparts mass to other fundamental particles. Scientists running the ATLAS experiment at the Large Hadron Collider (LHC), the world’s largest and most powerful “atom smasher,” […]

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New CERN Research Details Evidence of the Direct Decay of the Higgs Boson to Fermions

June 24, 2014

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New CERN Data Bolsters Higgs Boson Discovery

New research published in Nature Physics details strong evidence of the direct decay of the Higgs boson to fermions. If evidence of the Higgs boson revealed two years ago was the smoking gun, particle physicists at Rice University and their colleagues have now found a few of the bullets. The European Organization for Nuclear Research […]

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A Path Toward a New Breed of Miniature Particle Accelerators

May 30, 2014

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A Path Toward More Powerful Tabletop Accelerators

Berkley Lab researchers show how beams of various colors and phases affect plasma, finding that laser light needn’t be as precise as previously thought to drive miniature particle accelerators. Making a tabletop particle accelerator just got easier. A new study shows that certain requirements for the lasers used in an emerging type of small-area particle […]

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Physicists Confirm Discovery of Four-Quark Hadron

April 14, 2014

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Physicists Confirm Discovery of Four-Quark Hadron

The Large Hadron Collider beauty collaboration has confirmed the existence of exotic hadron with two quarks, two anti-quarks. Physicists in Syracuse University’s College of Arts and Sciences have helped confirm the existence of exotic hadrons — a type of matter that cannot be classified within the traditional quark model. Their finding is the subject of […]

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High-Precision Measurement of the Electron is More Precise by a Factor of 13

February 28, 2014

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Precise Measurement of Electron Mass

Physicists from the Max Planck Institute have achieved a high-precision measurement of the atomic mass of the electron, 13 times more precise than previously known. Electrons are the quantum glue of our world. Without electrons there would be no chemistry, and light would be unable to interact with matter. If electrons were only a little […]

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SLAC Scientists Create Artificial Cosmic-Ray Air Showers

February 11, 2014

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Researchers Create Artificial Cosmic Ray Air Showers for Study

Researchers at the SLAC National Accelerator Laboratory are set to test an experiment that mimics what happens when incredibly energetic particles hit our atmosphere. In a SLAC test facility, scientists have set the stage for an experiment that mimics what happens when incredibly energetic particles hit our atmosphere. The players include the lab’s historic linear […]

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Astronomers Accurately Measure the Mass of Neutrinos for the First Time

February 10, 2014

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Astronomers Accurately Measure the Mass of Neutrinos for the First Time

Astronomers from the universities of Nottingham and Manchester have accurately measured the mass of neutrinos for the first time. Scientists have solved a major problem with the current standard model of cosmology by combining results from the Planck spacecraft and measurements of gravitational lensing to deduce the mass of ghostly sub-atomic particles called neutrinos. The […]

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CERN Antimatter Experiment Produces First Beam of Antihydrogen

January 22, 2014

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CERN Antimatter Experiment Produces First Beam of Antihydrogen

A newly published study describes the how the ASACUSA experiment at CERN produced a beam of antihydrogen atoms for the first time. The ASACUSA experiment at CERN has succeeded for the first time in producing a beam of antihydrogen atoms. In a paper published in Nature Communications, the ASACUSA collaboration reports the unambiguous detection of […]

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