New work agrees with older research suggesting the oldest light in the universe – from the most distant galaxy yet known – started its journey toward us 13.77 billion years ago. Source: https://earthsky.org/space/a-new-look-at-the-universes-oldest-light…
Tag: Standard Model of Particle Physics
Researchers set new bounds on the mass of leptoquarks
At the most fundamental level, matter is made up of two types of particles: leptons, such as the electron, and quarks, which combine to form protons, neutrons and other composite particles. Under the Standard Model of particle physics, both leptons and quarks fall into three generations of increasing mass. Otherwise, the two kinds of particles are distinct. But some theories that…
Searching for sub-eV sterile neutrinos using two highly sensitive detectors
The standard model of particle physics only accounts for 20% of matter in the universe. Physicists have theorized that the remaining 80% is made up by so-called dark matter, which consists of particles that do not emit, absorb or reflect light and thus cannot be directly observed using any existing instruments. …
Scientists work to shed light on Standard Model of particle physics
As scientists await the highly anticipated initial results of the Muon g-2 experiment at the U.S. Department of Energy’s (DOE) Fermi National Accelerator Laboratory, collaborating scientists from DOE’s Argonne National Laboratory continue to employ and maintain the unique system that maps the magnetic field in the experiment with unprecedented precision. …
Why Do Matter Particles Come in Threes? A Physics Titan Weighs In.
Three progressively heavier copies of each type of matter particle exist, and no one knows why. A new paper by Steven Weinberg takes a stab at explaining the pattern. From a report: Electrons and two types of quarks, dubbed “up” and “down,” mix in various ways to produce every atom in existence. But puzzlingly, this family of matter particles — the…
New LHCb analysis still sees previous intriguing results
At a seminar today at CERN, the LHCb collaboration presented a new analysis of data from a specific transformation, or “decay,” that a particle called B0 meson can undergo. The analysis is based on twice as many B0 decays as previous LHCb analyses, which had disclosed some tension with the Standard Model of particle physics. The tension is still present in…
Strange particles found in Antarctica cannot be explained by physics
A NASA science balloon picked up two high-energy particles and a new analysis reveals they cannot be explained by the standard model of particle physics Source: https://www.newscientist.com/article/2229988-strange-particles-found-in-antarctica-cannot-be-explained-by-physics/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…