Trend Results : Particle Physics

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Quantum recurrence: Everything goes back to the way it was

It is one of the most astonishing results of physics: when a complex system is left alone, it will return to its initial state with almost perfect precision. Gas particles, for example, chaotically swirling around in a container, will return almost exactly to their starting positions after some time. Show More Summary

Scientists Will Transport Antimatter In A Truck

The antimatter of science fiction vastly differs from the real-life antimatter of particle physics. The former powers spaceships or bombs, while the latter is just another particle that physicists study, one that happens to be the mirror image with the opposite charge of the more familiar particles. More »      

Synopsis: Acoustic Waves Direct Particles in Microchannels

Acoustic waves guided by the channels of a microfluidic device can precisely manipulate microscopic particles suspended in the liquid flowing through the device. [Physics] Published Thu Feb 15, 2018

Current generated when light hits a material reveals electrons behaving like an elusive particle

A massless particle, a.k.a. Weyl fermion, predicted nearly 100 years ago, has been found in another corner of physics. Electrons in a semimetal can behave like these particles. They are either right-handed or left-handed—they are mirror images like our hands. Show More Summary

The search for dark matter: Axions have ever fewer places to hide

(The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences) If they existed, axions -- one of the candidates for particles of the mysterious dark matter -- could interact with the matter forming our world, but they would have to do this to a much, much weaker extent than it has seemed up to now. Show More Summary

First high-precision measurement of the mass of the W boson at the LHC

In a paper published today in the European Physical Journal C, the ATLAS Collaboration reports the first high-precision measurement at the Large Hadron Collider (LHC) of the mass of the W boson. This is one of two elementary particles that mediate the weak interaction – one of the forces that govern the behaviour of matter in our universe. Show More Summary

Particle interactions on Titan support the search for new physics discoveries

Nuclear physicists are using the nation's most powerful supercomputer, Titan, at the Oak Ridge Leadership Computing Facility to study particle interactions important to energy production in the sun and stars and to propel the search for new physics discoveries

Physics: Can Dark Matter Cool? Thousands of 'Clumps' Might Exist Outside Hot Galactic Halos

2 weeks agoNews : Newsweek: US

A new theoretical model of dark matter suggests it contains two distinct varieties of charged particles, which would allow it to form compact objects.

Synopsis: LHC Sees No Dark Photons

A search for dark photons at the LHC comes up empty but puts new constraints on the strength of the hypothetical particles’ coupling to electromagnetic fields. [Physics] Published Thu Feb 08, 2018

First 3-D imaging of excited quantum dots

(American Institute of Physics) Quantum dots are rapidly taking center stage in emerging applications and research developments, but researchers are still studying how to precisely control the growth of these nanoscale particles and their underlying quantum behavior. Show More Summary

Shrinking black holes avoid paradox by oozing hidden information

As black holes evaporate, they release particles that may carry more information than we thought, so black holes may not break the laws of physics after all

Shrinking black holes avoid paradox by oozing hidden information

As black holes evaporate, they release particles that may carry more information than we thought, so black holes may not break the laws of physics after all

Multiverse Thought Experiment Suggests Life Could Still Exist Under Different Laws Of Physics

Perhaps we aren't alone but instead reside in a multiverse stocked with all sorts of fantastical realms. These other universes are somewhat - but not exactly - like our own. Maybe gravity acts differently, or particles come in different shapes and sizes. Could life still exist in any of these bubbles? More »      

Generalized Hardy's paradox shows an even stronger conflict between quantum and classical physics

In 1993, physicist Lucien Hardy proposed an experiment showing that there is a small probability (around 6-9%) of observing a particle and its antiparticle interacting with each other without annihilating—something that is impossible in classical physics. Show More Summary

Physics: Speed of Light Could Be Brought to a Complete Stop By Trapping Particles Inside Crystals

3 weeks agoNews : Newsweek: US

The researchers believe the method could work for not just light, but other kinds of waves such as sound.

ATLAS Experiment studies the dynamics of very high-momentum top quarks

The top quark, the heaviest known fundamental particle, plays a unique role in high-energy physics. Studies of its properties have opened new opportunities for furthering our knowledge of the Standard Model. In a new paper submitted to Physical Review D, the ATLAS collaboration at CERN presents a comprehensive measurement of high-momentum top-quark pair production at 13 TeV.

Particle physics on the brain

Understanding the fundamental constituents of the universe is tough. Making sense of the brain is another challenge entirely. Each cubic millimetre of human brain contains around 4 km of neuronal "wires" carrying millivolt-level signals, connecting innumerable cells that define everything we are and do. Show More Summary

Diamonds show promise for spintronic devices

(American Institute of Physics) Recently, researchers have been exploring the potential for a new technology, called spintronics, that relies on detecting and controlling a particle's spin. This technology could lead to new types of more efficient and powerful devices. Show More Summary

New for three types of extreme-energy space particles: Theory shows unified origin

(Penn State) One of the biggest mysteries in astroparticle physics has been the origins of ultrahigh-energy cosmic rays, very high-energy neutrinos, and high-energy gamma rays. Now, a new theoretical model reveals that they all could be shot out into space after cosmic rays are accelerated by powerful jets from supermassive black holes. Show More Summary

Long-lived physics

New particles produced in the LHC's high-energy proton-proton collisions don't hang around for long. A Higgs boson exists for less than a thousandth of a billionth of a billionth of a second before decaying into lighter particles, which can then be tracked or stopped in our detectors. Show More Summary

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