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Your search has returned 140 articles:
  • News in Brief

    One particle’s trek suggests that ‘spacetime foam’ doesn’t slow neutrinos

    An intergalactic race between light and a bizarre subatomic particle called a neutrino has ended in a draw.

    The tie suggests that high-energy neutrinos, which are so lightweight they behave as if they’re massless, adhere to a basic rule of physics: Massless particles travel at the speed of light.

    Comparing the arrival times of a neutrino and an associated blaze of high-energy light...

    07/19/2018 - 07:00 Particle Physics, Astronomy
  • 50 years ago, neutrinos ghosted scientists

    Tracking the neutrino

    The definite detection of nonterrestrial neutrinos, whether from the sun or from beyond the solar system, will yield a far deeper understanding of stellar interiors and, therefore, of how today’s universe came to be. — Science News, July 20, 1968.

    Update

    In May 1968, researchers reported that a particle detector in South Dakota spotted ghostly subatomic...

    07/12/2018 - 16:47 Particle Physics, Astronomy, Technology
  • News

    A high-energy neutrino has been traced to its galactic birthplace

    A zippy little particle has been traced back to its cosmic stomping grounds, a flaring galaxy 4 billion light-years away, for the first time solving a cosmic whodunit.

    Scientists have long puzzled over the sources of high-energy particles from space, which batter the Earth at energies that can outstrip the world’s most advanced particle accelerators. Now, physicists have identified the...

    07/12/2018 - 11:00 Particle Physics, Astronomy
  • Letters to the Editor

    Readers ask about proton pressure, wearable tech and more

    Pressure gauge

    The pressure inside a proton is the highest of any known substance, Emily Conover reported in “The inside of a proton endures more pressure than anything else we’ve seen” (SN: 6/9/18, p. 10).

    “I don’t think it’s valid to think of pressure on a quantum level the same way we do classically,” Reddit user phazer6 wrote. Pressure relates to collections of particles, but “...

    07/11/2018 - 07:15 Particle Physics, Technology, Earth
  • News

    If real, dark fusion could help demystify this physics puzzle

    Fusion may have a dark side. A shadowy hypothetical process called “dark fusion” could be occurring throughout the cosmos, a new study suggests.

    The standard type of fusion occurs when two atomic nuclei unite to form a new element, releasing energy in the process. “This is why the sun shines,” says physicist Sam McDermott of Fermilab in Batavia, Ill. A similar process — dark fusion —...

    06/06/2018 - 09:00 Particle Physics, Astronomy
  • News

    Mysterious neutrino surplus hints at the existence of new particles

    Pip-squeak particles called neutrinos are dishing out more than scientists had bargained for.

    A particle detector has spotted a puzzling abundance of the lightweight subatomic particles and their antimatter partners, antineutrinos, physicists report May 30 at arXiv.org. The finding mirrors a neutrino excess found more than two decades ago. And that match has researchers wondering if a...

    06/01/2018 - 15:45 Particle Physics
  • News in Brief

    Two-faced star reveals a pulsar’s surprising bulk

    A two-faced star just helped weigh an extra-massive pulsar.

    The star takes about four hours to orbit its companion, a fast-spinning stellar corpse called a pulsar that’s about 10,000 light-years from Earth. That means the pair’s orbital dance is tight enough that the star always shows the same face to the pulsar, similar to how the moon is oriented to Earth.

    Radiation from the...

    05/31/2018 - 09:00 Astronomy, Particle Physics
  • News in Brief

    Dark matter particles elude scientists in the biggest search of its kind

    The largest particle detector of its kind has failed to turn up any hints of dark matter, despite searching for about a year.

    Known as XENON1T, the experiment is designed to detect elusive dark matter particles, which are thought to make up most of the matter in the cosmos. Physicists don’t know what dark matter is. One of the most popular explanations is a particle called a WIMP, short...

    05/28/2018 - 05:00 Particle Physics
  • News

    The inside of a proton endures more pressure than anything else we’ve seen

    Pity the protons: Those little particles are under a lot of pressure. Protons’ innards are squeezed harder than any other substance we have measured, a new study finds.

    “It’s really the highest pressure we have ever seen,” says physicist Volker Burkert, a coauthor of the study, published in the May 17 Nature. Protons break the pressure record set by neutron stars, the incredibly dense...

    05/16/2018 - 13:18 Particle Physics
  • News in Brief

    The proton’s weak side is just as feeble as physicists thought

    Protons are no one-trick ponies. Although famous for their positive electric charge, the particles also carry an analogous, lesser-known charge, called the weak charge. Now, physicists have made the most precise measurement of the proton’s underdog attribute, members of the Q-weak experiment report in the May 10 Nature.

    The weak charge dictates how the proton responds to the weak nuclear...

    05/09/2018 - 13:00 Particle Physics