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E.g., 04/27/2017
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  • LHCb experiment
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Your search has returned 108 articles:
  • 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
  • Science Ticker

    Rare triplet of high-energy neutrinos detected from an unknown source

    Three high-energy neutrinos have been spotted traveling in tandem.

    The IceCube Neutrino Observatory in Antarctica detected the trio of lilliputian particles on February 17, 2016. This is the first time the experiment has seen a triplet of neutrinos that all seemed to come from the same place in the sky and within 100 seconds of one another. Researchers report the find February 20 on...

    03/03/2017 - 13:20 Particle Physics, Astronomy
  • News

    Possible sign of dark matter shows up again

    A strange X-ray signal has popped up again in new measurements, raising hopes that it could be a sign of dark matter.

    Data from NASA’s Chandra X-ray Observatory reveal an excess of X-rays at a particular energy, creating a bump on a plot, scientists report online at arXiv.org on January 29. The X-ray “line,” as it is known, could reveal the presence of dark matter — an unknown substance...

    01/30/2017 - 08:00 Physics, Astronomy, Particle Physics
  • Letters to the Editor

    Readers weigh in on dinos, dark matter and more

    Prehistoric tweet

    Researchers uncovered the fossilized voice box, called a syrinx, of an ancient bird that lived 68 million to 66 million years ago. The bird may have sounded like a honking duck, Meghan Rosen reported in “Ancient avian voice box unearthed” (SN: 11/12/16, p. 7).

    Online reader David Spector wondered if researchers could 3-D print the syrinx to replicate the ancient bird’s...

    01/11/2017 - 12:15 Paleontology, Particle Physics, Health
  • News in Brief

    Dark matter still missing

    Chalk up one more loss for physicists searching for dark matter. Scientists with the XENON100 experiment have largely ruled out another experiment’s controversial claim of detecting dark matter.

    XENON100, located in Italy’s Gran Sasso National Laboratory, aims to directly detect particles of dark matter — the unknown substance that scientists believe makes up the bulk of matter in the...

    01/10/2017 - 07:00 Particle Physics