Light-by-light scattering is a rare phenomenon in which two photons—particles of light—interact, producing another pair of photons. Direct observation of this process at high energy had proven elusive for decades, until ...
General Physics
Jun 19, 2020
0
44
The ATLAS Collaboration at CERN is exploring novel ways to search for new phenomena. Alongside an extensive research program often inspired by specific theoretical models—ranging from quantum black holes to supersymmetry—physicists ...
General Physics
Jun 17, 2020
0
78
Visible matter—everything from pollen to stars and galaxies—accounts for roughly 15% of the total mass of the universe. The remaining 85% is made of something entirely different from things we can touch and see: dark ...
General Physics
Jun 15, 2020
15
616
A hallmark of the strong force at the Large Hadron Collider (LHC) is the dramatic production of collimated jets of particles when quarks and gluons scatter at high energies. Particle physicists have studied jets for decades ...
General Physics
Jun 8, 2020
3
159
When a particle is transformed into its antiparticle and its spatial coordinates inverted, the laws of physics are required to stay the same—or so we thought. This symmetry—known as CP symmetry (charge conjugation and ...
General Physics
Jun 2, 2020
1
374
We often think of asteroids and comets as distinct types of small bodies, but astronomers have discovered an increasing number of "crossovers." These objects initially appear to be asteroids, and later develop activity, such ...
Space Exploration
May 21, 2020
17
292
Two years ago, the Higgs boson was observed decaying to a pair of beauty quarks (H→bb), moving its study from the "discovery era" to the "measurement era." By measuring the properties of the Higgs boson and comparing them ...
General Physics
Apr 22, 2020
0
204
A comet called Atlas is currently heading toward the sun, and it just might put on a really good show in a couple of months. Discovered last December by the Asteroid Terrestrial-impact Last Alert system in Hawaii (thus the ...
One of the big questions in physics and chemistry is, how were the heavy elements from iron to uranium created? The Argonne Tandem Linac Accelerator System (ATLAS) at the U.S. Department of Energy's (DOE) Argonne National ...
General Physics
Mar 6, 2020
0
78
NASA's Artemis Program is planning to land astronauts on the moon's south pole. To prepare for this, NASA's Solar System Exploration Research Virtual Institute (SSERVI) is creating the Lunar South Pole Atlas (LSPA). As part ...
Space Exploration
Mar 6, 2020
0
20
