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E.g., 07/26/2017
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Your search has returned 112 articles:
  • News in Brief

    Newfound particle relies on its charm(s)

    A newly discovered particle is dishing out a double dose of charm.

    The newcomer is a baryon, meaning that it’s composed of three smaller particles called quarks — in this case, two “charm” quarks and one “up” quark. Detected by the LHCb experiment at CERN, the European physics laboratory near Geneva, the baryon is the first to be discovered with two charm quarks, LHCb scientists reported...

    07/07/2017 - 12:23 Particle Physics
  • Letters to the Editor

    Readers intrigued by Mars' far-out birth

    Martian mysteries

    Mars may have formed out where the asteroid belt is now, far from its planetary neighbors, Thomas Sumner reported in “New proposal reimagines Mars’ origin” (SN: 5/27/17, p. 14).

    Readers online were fascinated by Mars’ origin story. “There seemed to be evidence of actual seas on early Mars,” stargene wrote. “How can this be finessed into the idea of Mars living out in...

    07/06/2017 - 12:30 Planetary Science, Genetics, Particle Physics
  • Letters to the Editor

    Readers puzzled by proton's properties

    Proton puzzler

    Uncertainty over the proton’s size, spin and life span could have physicists rethinking standard notions about matter and the universe, Emily Conover reported in “The proton puzzle” (SN: 4/29/17, p. 22).

    Readers wondered about the diameter (or size) of the proton, which has three fundamental particles called quarks rattling around inside. “Still scratching my head over how...

    05/31/2017 - 15:45 Particle Physics, Climate, Planetary Science
  • News in Brief

    Antiproton count hints at dark matter annihilation

    Whiffs of dark matter may be blowing in on a cosmic ray breeze. Antiprotons streaming down on Earth from space could be hinting at the existence of the invisible substance, two teams of researchers suggest.

    Particles known as cosmic rays are constantly whizzing through space. These particles include protons and their antimatter partners, antiprotons. While antiprotons are produced in run...

    05/11/2017 - 17:27 Particle Physics
  • News

    Collider data hint at unexpected new subatomic particles

    A handful of measurements of decaying particles has seemed slightly off-kilter for years, intriguing physicists. Now a new decay measurement at the Large Hadron Collider in Geneva has amplified that interest into tentative enthusiasm, with theoretical physicists proposing that weird new particles could explain the results. Scientists with the LHCb experiment reported the new result on April 18...

    04/20/2017 - 15:47 Particle Physics
  • Editor's Note

    Scientists find amazement in what’s most familiar

    For her 7th birthday, my niece received a very special gift — a compound light microscope with a set of slides. As soon as we got it out of the package, she became a diligent young investigator, studying the leg of a fly, dog cardiac muscle and onion epidermal cells. But it wasn’t the prepared slides that captivated her most. She wanted to investigate more familiar things. We plucked hairs...

    04/19/2017 - 11:50 Particle Physics, Animals
  • Feature

    There’s still a lot we don’t know about the proton

    Nuclear physicist Evangeline Downie hadn’t planned to study one of the thorniest puzzles of the proton.

    But when opportunity knocked, Downie couldn’t say no. “It’s the proton,” she exclaims. The mysteries that still swirl around this jewel of the subatomic realm were too tantalizing to resist. The plentiful particles make up much of the visible matter in the universe. “We’re made of them...

    04/18/2017 - 08:00 Physics, Particle Physics, Quantum Physics
  • News in Brief

    New particle probably can’t explain nuclear reactor neutrino mystery

    A puzzling neutrino shortfall seems to be due to faulty predictions, not a new particle.

    In experiments at nuclear reactors, scientists have consistently found about 6 percent fewer antineutrinos, the antimatter form of neutrinos, than expected. That deficit could hint that the lightweight particles are morphing into undetectable new particles called sterile neutrinos (SN: 3/19/16, p. 14...

    04/14/2017 - 09:38 Particle Physics
  • Letters to the Editor

    Readers question supernova physics

    Supernova surprise

    Astronomers continue to learn a lot from supernova 1987A, which burst onto the scene 30 years ago. Thanks to new detectors that can pick up neutrino signals and even gravitational waves, scientists will be ready when the next nearby star explodes, Emily Conover reported in “Waiting for a supernova” (SN: 2/18/17, p. 24).

    Steve Capps wondered how neutrinos inside an...

    03/22/2017 - 12:10 Particle Physics, Robotics, Condensed Matter
  • Science Ticker

    Large Hadron Collider experiment nabs five new particles

    Physicists have snagged a bounty of five new particles in one go.

    Members of the LHCb experiment, located at the Large Hadron Collider near Geneva, reported the prolific particle procurement in a paper posted online March 14 at arXiv.org. The five particles are each composed of three quarks — a class of particle that makes up larger particles such as protons and neutrons. Each of the new...

    03/21/2017 - 15:25 Particle Physics