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Keyword: physics

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  • New Map of Dark Matter Spanning 10 Million Galaxies Hints at a Flaw in Our Physics

    02/15/2019 8:12:19 AM PST · by BenLurkin · 48 replies
    Science Alert ^ | 14 FEB 2019 | MICHELLE STARR
    An invisible force is having an effect on our Universe. We can't see it, and we can't detect it - but we can observe how it interacts gravitationally with the things we can see and detect, such as light. Now an international team of astronomers has used one of the world's most powerful telescopes to analyse that effect across 10 million galaxies in the context of Einstein's general relativity. The result? The most comprehensive map of dark matter across the history of the Universe to date. ... "If further data shows we're definitely right, then it suggests something is missing...
  • CERN wants to build a particle collider that’s four times bigger than the LHC

    01/17/2019 6:58:42 AM PST · by C19fan · 9 replies
    MIT Technology Review ^ | January 16, 2019 | Staff
    CERN wants to go super-sized. The particle physics lab near Geneva in Switzerland has just unveiled its plans for a replacement for the Large Hadron Collider (LHC). The news: CERN has released a design report for the Future Circular Collider, which would be four times as big as the LHC. Colliders send particles around a loop at incredible speeds and then let researchers analyze the fallout when they smash into one another. The design for the FCC would be some 100 kilometers (62 miles) long and, when operating at full capacity, collide particles at 10 times the energy of the...
  • Niels Bohr’s Flight From the Nazis Was a Science Drama

    12/20/2018 6:55:25 AM PST · by C19fan · 10 replies
    War is Boring ^ | December 20, 2018 | Christopher Miskimon
    Danish physicist Niels Bohr was a scientific genius who also displayed a coincidental penchant for espionage and intrigue. He employed these skills, along with a bit of science, to foil the Nazi at several turns. His small crusade began in 1933 after the Nazis came to power in Germany. Over the next few years several scientists fled Germany with Bohr’s help. Many escapees went on to work on the Manhattan Project, including Edward Teller, James Franck and Otto Frisch. Some of them stayed with Bohr in Denmark, working at the Bohr Institute until moving elsewhere.
  • Einstein's Theory of General Relativity Just Survived a Massive Crash in Outer Space

    11/29/2018 11:07:34 AM PST · by ETL · 33 replies ^ | Nov 29, 2018 | Rafi Letzter, Staff Writer
    Gravity is big and weird and difficult to study. It moves through space as a wave, sort of like how light does. But these waves are subtle and difficult to detect. They occur in measurable amounts only after massive events, like the collision of black holes. Humanity didn't spot its first gravitational wave until 2015. Then, in 2017, astronomers for the first time detected both gravitational waves and light from a single event: a neutron star collision. Now, researchers are using data from that event to confirm some basic facts about the universe. In a paper first uploaded Nov. 1...
  • Could Misbehaving Neutrinos Explain Why the Universe Exists?

    10/29/2018 10:18:28 AM PDT · by ETL · 32 replies ^ | Oct 28, 2018 | Don Lincoln, Senior Scientist, Fermi National Accelerator Laboratory
    Scientists revel in exploring mysteries, and the bigger the mystery, the greater the enthusiasm. There are many huge unanswered questions in science, but when you're going big, it's hard to beat "Why is there something, instead of nothing?" That might seem like a philosophical question, but it's one that is very amenable to scientific inquiry. Stated a little more concretely, "Why is the universe made of the kinds of matter that makes human life possible so that we can even ask this question?" Scientists conducting research in Japan have announced a measurement last month that directly addresses that most fascinating...
  • Five mysteries the Standard Model can’t explain

    10/19/2018 9:14:03 AM PDT · by MtnClimber · 44 replies
    Symmetry ^ | 18 Oct, 2018 | Oscar Miyamoto Gomez
    Our best model of particle physics explains only about 5 percent of the universe. The Standard Model is a thing of beauty. It is the most rigorous theory of particle physics, incredibly precise and accurate in its predictions. It mathematically lays out the 17 building blocks of nature: six quarks, six leptons, four force-carrier particles, and the Higgs boson. These are ruled by the electromagnetic, weak and strong forces. “As for the question ‘What are we?’ the Standard Model has the answer,” says Saúl Ramos, a researcher at the National Autonomous University of Mexico (UNAM). “It tells us that every...
  • Why the Many-Worlds Interpretation Has Many Problems

    10/19/2018 6:27:03 AM PDT · by C19fan · 48 replies
    Quanta Magazine ^ | October 18, 2018 | Phillip Ball
    It is the most extraordinary, alluring and thought-provoking of all the ways in which quantum mechanics has been interpreted. In its most familiar guise, the many-worlds interpretation (MWI) suggests that we live in a near-infinity of universes, all superimposed in the same physical space but mutually isolated and evolving independently. In many of these universes there exist replicas of you and me, all but indistinguishable yet leading other lives. The MWI illustrates just how peculiarly quantum theory forces us to think. It is an intensely controversial view. Arguments about the interpretation of quantum mechanics are noted for their passion, as...
  • 'Fudge factors' in physics?

    10/13/2018 10:43:45 AM PDT · by ETL · 21 replies ^ | Oct 11, 2018 | Tracey Bryant, University of Delaware
    Science is poised to take a "quantum leap" as more mysteries of how atoms behave and interact with each other are unlocked. The field of quantum physics, with its complex mathematical equations for predicting the interactions and energy levels of atoms and electrons, already has made possible many technologies we rely on every day—from computers and smartphones, to lasers and magnetic resonance imaging. And experts say revolutionary advancements are destined to come.But to take a giant leap, you have to be physically fit, and researchers at the University of Delaware have found an area of quantum physics that could use...
  • A Physicist Said Women's Brains Make Them Worse at Physics — Experts Say That's 'Laughable'

    10/07/2018 8:18:48 AM PDT · by ETL · 47 replies
    LiveScience ^ | October 2, 2018 | Rafi Letzter, Staff Writer
    -snip- Alessandro Strumia, the physicist in question and a professor at Pisa University in Italy, gave his presentation to a crowd at the European Organization for Nuclear Research (CERN), one of the word's most important nuclear physics organizations. The topic of the day was gender in physics, and the crowd was mostly composed of women, according to The Guardian. Over the course of several slides of his presentation, which are available online, Strumia laid out an IQ-based argument for disparities between men and women in physics. "Physics graduates have top IQ," he wrote. "It's needed." He pointed to a study that...
  • Bizarre Particles Keep Flying out of Antarctica's Ice, and They Might Shatter Modern Physics

    10/03/2018 9:43:57 PM PDT · by bitt · 78 replies ^ | 9/29/2018 | Rafi Letzier
    Cosmic rays emanating from the south polar ice cap could lead to new physics There’s something mysterious coming up from the frozen ground in Antarctica, and it could break physics as we know it. Physicists don’t know what it is exactly. But they do know it’s some sort of cosmic ray—a high-energy particle that’s blasted its way through space, into the Earth, and back out again. But the particles physicists know about—the collection of particles that make up what scientists call the Standard Model (SM) of particle physics—shouldn’t be able to do that. Sure, there are low-energy neutrinos that can...
  • Cern scientist: 'Physics built by men - not by invitation'

    10/01/2018 12:43:31 PM PDT · by Governor Dinwiddie · 41 replies
    BBC ^ | October 1, 2018 | Pallab Ghosh
    A senior scientist has given what has been described as a "highly offensive" presentation about the role of women in physics, the BBC has learned. At a workshop organised by Cern, Prof Alessandro Strumia of Pisa University said that "physics was invented and built by men, it's not by invitation". He said male scientists were being discriminated against because of ideology rather than merit. He was speaking at a workshop in Geneva on gender and high energy physics. Prof Strumia has since defended his comments, saying he was only presenting the facts . . .
  • For Tiny Light Particles, 'Before' and 'After' Mean Nothing

    09/21/2018 8:19:00 PM PDT · by BenLurkin · 20 replies ^ | September 20, 2018 10:21am ET | Yasemin Saplakoglu, Live Science Staff Writer |
    In this mini world, the concepts of "before" and "after" dissolve, such that two events can both precede and succeed each other. In other words, event A can occur before event B, and event B can occur before event A... This idea, called a "quantum switch," was first proposed in 2009 by another team and has since been explored both theoretically and experimentally. Previous experiments showed event A could both precede and succeed event B, but the research couldn't say that these two scenarios were happening at the same place, said Cyril Branciard, co-author of this new study and a...
  • Happy Birthday, LHC: Here's to 10 Years of Atom Smashing at the Large Hadron Collider

    09/13/2018 8:41:04 AM PDT · by ETL · 14 replies ^ | Sept 11, 2018 | Don Lincoln, Senior Scientist, Fermi National Accelerator Laboratory; Adjunct Professor of Physics,
    Ten years ago, the world's largest scientific instrument was turned on and the start of a research dynasty began. On Sept. 10, 2008, a beam of protons was shot for the first time around the entire 16.5-mile-long (27 kilometers) ring of the Large Hadron Collider (LHC) — the world's largest and highest energy atom smasher ever constructed. Located at the CERN laboratory, just outside Geneva, Switzerland, the LHC was constructed to smash highly energetic beams of protons together at near the speed of light. The stated goal was to create and discover the Higgs boson, the last missing piece of...
  • Everything Worth Knowing About ... Entanglement

    08/18/2018 9:28:36 PM PDT · by blam · 16 replies
    Discover Magazine ^ | 8-18-2018 | Devin Powell
    Up until last year, mathematician Peter Bierhorst had hoped the physicists he works with would fail. It was nothing personal. He just found their worldview a little disturbing. Like most physicists, his co-workers believe that our universe’s particles can influence each other using a sort of telepathy. Called “entanglement,” this connection allows two particles separated by vast distances to behave as a single entity. Both instantly react to something that happens to one of them. If you find this very weird and counterintuitive, you’re not alone. “I find this very weird and counterintuitive,” says Bierhorst, a postdoc at the National...
  • A Major Physics Experiment Just Detected a Particle That Shouldn't Exist

    06/04/2018 7:12:49 AM PDT · by Red Badger · 90 replies ^ | June 1, 2018 04:49pm ET | By Rafi Letzter, Staff Writer
    Scientists have produced the firmest evidence yet of so-called sterile neutrinos, mysterious particles that pass through matter without interacting with it at all. The first hints these elusive particles turned up decades ago. But after years of dedicated searches, scientists have been unable to find any other evidence for them, with many experiments contradicting those old results. These new results now leave scientists with two robust experiments that seem to demonstrate the existence of sterile neutrinos, even as other experiments continue to suggest sterile neutrinos don't exist at all. That means there's something strange happening in the universe that is...
  • Mysterious neutrino surplus hints at the existence of new particles

    06/03/2018 1:08:06 PM PDT · by ETL · 52 replies ^ | June 1, 2018 | Emily Conover
    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 The finding mirrors a neutrino excess found more than two decades ago. And that match has researchers wondering if a new type of particle called a sterile neutrino — one even more shadowy than the famously elusive ordinary neutrinos — might be at large.Such a particle, if it exists, would transform the foundations of particle physics and could help solve cosmic puzzles like the...
  • Feynman the joker

    05/12/2018 10:00:36 AM PDT · by MtnClimber · 35 replies
    Physics Today ^ | 11 May, 2018 | Melinda Baldwin
    Richard Phillips Feynman, who was born 100 years ago today, made his mark with contributions to particle physics, superfluidity, and quantum electrodynamics—the last of which won him the 1965 Nobel Prize. That honor alone would have been enough to guarantee him a place in the history of science...... Yet Feynman’s posthumous reputation rests not just on his aptitude for physics but also on his playful personality. He’s known for pulling pranks at Los Alamos, trying his hand at a variety of quirky hobbies, and taking road trips in a Dodge Tradesman Maxivan...... When Feynman pointed out the security gap at...
  • Does the Universe Care About Stephen Hawking?

    Famed scientist Stephen Hawking died earlier this week at the age of 76. He is largely regarded as one of the most important physicists in history. Of course, the tributes came pouring in. While most commemorated his genius and determination to transcend the debilitating effects of ALS, others attempted more nuanced commentary. Like USA Today which took Hawking’s death as opportunity to remind us of the physicist’s view that “Heaven is a fairy story.” Hawking, who died at 76, spoke candidly in a 2011 Guardian interview about what he believes happens when people die. He told the Guardian that while...
  • Lack of evidence put Hawking’s Nobel hopes in black hole

    03/15/2018 5:21:09 AM PDT · by C19fan · 38 replies
    AP ^ | March 14, 2018 | Seth Borenstein
    Stephen Hawking won accolades from his peers for having one of the most brilliant minds in science, but he never got a Nobel Prize because no one has yet proven his ideas. The Nobel committee looks for proof, not big ideas. Hawking was a deep thinker — a theorist — and his musings about black holes and cosmology have yet to get the lockdown evidence that accompanies the physics prizes, his fellow scientists said.
  • Mathematicians work to expand their new pictorial mathematical language into other areas

    03/02/2018 3:52:26 PM PST · by LibWhacker · 24 replies
    PhysOrg ^ | 2/6/18
    Mathematicians work to expand their new pictorial mathematical language into other areas February 6, 2018, Harvard University An illustration of the project is pictured in Lyman Building at Harvard University. Credit: Stephanie Mitchell/Harvard Staff Photographer A picture is worth 1,000 words, the saying goes, but a group of Harvard-based scientists is hoping that it may also be worth the same number of equations. Pictorial laws appear to unify ideas from disparate, interdisciplinary fields of knowledge, linking them beautifully like elements of a da Vinci painting. The group is working to expand the pictorial mathematical language first outlined last year by...