The Physics Times

2022-01-13 23:23:19 #PhysicsNEWS
@Phytimes
New insight into the internal structure of the proton
While the Large Hadron Collider (LHC) at CERN is well known for smashing protons together, it is actually the quarks and gluons inside the protons—collectively known as partons—that are really interacting. Thus, in order to predict the rate of a process occurring in the LHC—such as the production of a Higgs boson or a yet-unknown particle—physicists have to understand how partons behave within the proton. This behavior is described in parton distribution functions (PDFs), which describe what fraction of a proton's momentum is taken by its constituent quarks and gluons.
@Phytimes Open / Comment

2022-01-10 21:55:11 #PhysicsNEWS
@Phytimes
Manifolds in commonly used atomic fingerprints lead to failure in machine-learning four-body interactions
Atomic environment fingerprints, or structural descriptors, are used to describe the chemical environment around a reference atom. Encoding information such as bond-lengths to neighboring atoms or coordination numbers, these fingerprints are used, for example, as inputs in machine learning approaches or to eliminate redundant structures in structural searches  
@Phytimes Open / Comment

2022-01-07 10:17:39 #PhysicsNEWS
@Phytimes
Terahertz light-driven spin-lattice control: A new potential path to faster and more efficient data storage
An international team of researchers from the University of Cologne (Germany), Radboud University Nijmegen (The Netherlands), the Ioffe Institute and the Prokhorov General Physics Institute (Russia) has discovered a new mechanism to control spin-lattice interaction using ultrashort terahertz (THz) pulses (terahertz means 1012 hertz). This mechanism can open up new and elegant ways to control propagation of spin waves and thus make an important step to conceptually new technologies of data processing in future. The results have been published in Science. 
@Phytimes Open / Comment

2022-01-05 20:44:47 #PhysicsNEWS
@Phytimes
Matter and antimatter seem to respond equally to gravity
As part of an experiment to measure—to an extremely precise degree—the charge-to-mass ratios of protons and antiprotons, the RIKEN-led BASE collaboration at CERN, Geneva, Switzerland, has found that, within the uncertainty of the experiment, matter and antimatter respond to gravity in the same way.
@Phytimes Open / Comment

2022-01-04 22:31:38 #PhysicsNEWS
@Phytimes
Black holes and dark matter—are they one and the same?
Primordial black holes created in the first instants after the Big Bang—tiny ones smaller than the head of a pin and supermassive ones covering billions of miles—may account for all of the dark matter in the universe.
@Phytimes Open / Comment

2021-12-30 15:39:41 #PhysicsNEWS
@Phytimes
Transmissive-detected laser speckle imaging for blood flow monitoring in thick tissue
Blood flow velocity is an important parameter reflecting vascular function. Abnormal vascular function is closely related to the occurrence and development of many diseases, such as diabetes, arteriosclerosis, thrombosis and so on. Therefore, the monitoring of flow velocity is not only an important research target, but also an important clinical indicator.
@Phytimes Open / Comment

2021-12-23 22:12:01 #PhysicsNEWS
@Phytimes
The mystery of the small dimensionless number with a big effect
Non-dimensional numbers may sound like a scary, incomprehensible term reserved for scientists in a laboratory, but you have more experience with them than you know. The Mach number measures the speed of an object relative to the speed of sound, so whether measuring in kilometers per second or miles per hour, Mach 2 is always twice the speed of sound. With the COVID-19 pandemic still raging worldwide, R0 is an important number constantly in the news that measures how many people a person will infect over the course of an illness, whether that time period is days, weeks or months.
@Phytimes Open / Comment

2021-12-20 20:46:10 #PhysicsNEWS
@Phytimes
Light-scattering dynamics could inform interpretation of Big Bang remnants
By confirming certain light-scattering dynamics first proposed a half-century ago, University of Nebraska–Lincoln physicists are casting fresh eyes on the universe-birthing fireworks ignited by the Big Bang nearly 14 billion years ago.
@Phytimes Open / Comment

2021-12-18 20:15:07 #PhysicsNEWS
@Phytimes
Maybe 'boson clouds' could explain dark matter
The nature of dark matter continues to perplex astronomers. As the search for dark matter particles continues to turn up nothing, it's tempting to throw out the dark matter model altogether, but indirect evidence for the stuff continues to be strong. So what is it? One team has an idea, and they've published the results of their first search.
@Phytimes Open / Comment

2021-12-16 20:11:32 #PhysicsNEWS
@Phytimes
Gravitational wave scientists set their sights on dark matter
The technologies behind one of the biggest scientific breakthroughs of the century—the detection of gravitational waves—are now being used in the long-standing search for dark matter.
@Phytimes Open / Comment