Physics News

Dark Energy is Misidentification of Variations in Kinetic Energy of Universe’s Expansion, Scientists Say

This artist’s impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the Cosmic Microwave Background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.
Dec 23, 2024 by News Staff

Dark energy — an unknown energy source that is causing our Universe’s expansion to accelerate – doesn’t actually exist, according to new research. This artist’s impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the Cosmic Microwave Background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian...

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View of the LHCb detector. Image credit: CERN.

Physicists Find Evidence for Matter-Antimatter Asymmetry in Decays of Baryons and Beauty Hadrons

Dec 19, 2024 by News Staff

The Standard Model of particle physics predicts an asymmetry between matter and antimatter known as charge-parity (CP) violation. But the size of this...

Event display of a candidate event for Higgs boson pair production. Image credit: CERN.

CMS Experiment Searches for Higgs Boson Pair Production in Proton-Proton Collisions

Dec 18, 2024 by News Staff

Using data from high-energy proton-proton collisions in Run 2 of CERN’s Large Hadron Collider (LHC), physicists with the CMS Collaboration have released...

Illustration of the production of antihyperhelium-4 in lead-lead collisions. Image credit: J. Ditzel with AI-assistance.

CERN Physicists Find First Ever Evidence of Antihyperhelium-4

Dec 16, 2024 by News Staff

Physicists with the ALICE Collaboration at CERN’s Large Hadron Collider (LHC) have seen the first ever evidence of antihyperhelium-4, which is composed...

Mapping of the altermagnetic order vector in MnTe. Image credit: Amin et al., doi: 10.1038/s41586-024-08234-x.

New Class of Magnetism Imaged for First Time: Altermagnetism

Dec 12, 2024 by News Staff

Altermagnetism is a distinct form of magnetic order where the tiny constituent magnetic building blocks align antiparallel to their neighbors, but the...

A diffractive robot. Image credit: Smart et al., doi: 10.1126/science.adr2177.

Researchers Create Smallest Walking Robot Yet

Dec 4, 2024 by News Staff

A team of researchers at Cornell University has created a new class of magnetically controlled microscopic robots (microbots) that operate at the visible-light...

Data from past proton-electron collisions provide strong evidence of entanglement among the proton’s sea of quarks (spheres) and gluons (squiggles), which may play an important role in their strong-force interactions. Image credit: Valerie Lentz / Brookhaven National Laboratory.

Physicists Map Out Quantum Entanglement in Protons

Dec 3, 2024 by News Staff

Physicists have found a new way to use data from high-energy particle smashups to peer inside protons. Their approach uses quantum information science...

An artist’s impression of primordial black holes. Image credit: NASA.

Astrophysicists to Search for Primordial Black Holes in Planets, Asteroids, and Materials on Earth

Dec 2, 2024 by News Staff

Primordial black holes have been theorized for decades and could even be ever-elusive dark matter. Still, no primordial black hole has ever been observed....

Ben Yuen & Angela Demetriadou define the precise shape of a single photon. Image credit: Ben Yuen & Angela Demetriadou.

Physicists Shed Light on Precise Shape of Single Photon

Nov 19, 2024 by News Staff

New research from the University of Birmingham explores the nature of photons — individual particles of light — in unprecedented detail. Ben...

Display of a lead-lead collision at 5.02 TeV per nucleon pair that resulted in a candidate pair of top quarks that decay into other particles. The event contains four particle jets (yellow cones), one electron (green line) and one muon (red line). The inlay shows an axial view of the event. Image credit: ATLAS / CERN.

CERN Physicists Observe Top-Quark Pairs in Lead-Lead Collisions

Nov 19, 2024 by News Staff

Top-quark pair production has been observed in lead-lead collisions at CERN’s Large Hadron Collider (LHC) with the ATLAS detector, marking the first...

The shadow of a laser beam. Image credit: Abrahao et al., doi: 10.1364/optica.534596.

Under Right Conditions, Laser Beam Can Cast Shadow

Nov 14, 2024 by News Staff

In a new paper published today in the journal Optica, physicists describe how a laser beam can be made to cast a shadow that behaves as any other ordinary...

Fermium isotopes studied by Warbinek et al. are highlighted in this chart. Image credit: S. Raeder.

Physicists Measure Nuclear Properties of Fermium

Nov 13, 2024 by News Staff

Physicists at the GSI/FAIR accelerator facility have gained insights into the structure of atomic nuclei of fermium, a synthetic chemical element of the...

Fore et al. study neutron star crusts by simulating neutron matter then adding ‘hidden’ neutrons to mediate interactions between ‘real’ neutrons; next, neural networks construct a quantum wave function of neutron matter’s normal and superfluid phases. Image credit: Jane Kim, Ohio University.

Physicists Find Evidence for Superfluidity in Low-Density Neutron Matter

Nov 11, 2024 by News Staff

An accurate description of low-density nuclear matter is crucial for explaining the physics of neutron star crusts, according to a team of theoretical...

A view of the accretion disk around the supermassive black hole, with jet-like structures flowing away from the disk. The extreme mass of the black hole bends spacetime, allowing the far side of the accretion disc to be seen as an image above and below the black hole. Image credit: Science Communication Lab, DESY.

DESI Searching for Evidence of Dark Energy from Black Holes

Oct 28, 2024 by News Staff

According to the prevailing inflationary universe theory, at the very beginning of the Big Bang, a mysterious energy drove an exponential expansion of...

The region of the nuclear chart 87≤Z≤97 and 112≤N≤136 shows the new isotope plutonium-227 (red star) and the 12 nuclides (blue star) that were discovered at the Institute of Modern Physics at the Chinese Academy of Sciences. Image credit: Huabin Yang.

Physicists Synthesize New Isotope of Plutonium

Oct 11, 2024 by News Staff

The newly-discovered isotope, plutonium-227, has a half-life of 0.78 seconds, according to a team of physicists from China. The region of the nuclear chart...

An illustration of the strong interaction in the proton-deuteron system produced in proton-proton collisions at CERN’s Large Hadron Collider. Image credit: ALICE / CERN.

CERN Physicists Explore Strong Interaction of Three-Body Systems

Sep 30, 2024 by News Staff

Three-body nuclear systems are key to many aspects of modern nuclear physics, such as understanding the equation of state of high-density nuclear matter...

This artist’s illustration shows the ejection of a cloud of debris after NASA’s DART spacecraft collided with the asteroid Dimorphos. Image credit: ESO / M. Kornmesser.

X-ray Pulses from Nuclear Explosions Can Deflect Dangerous Asteroids, Researchers Say

Sep 24, 2024 by News Staff

Around 66 million years ago, the Chicxulub asteroid impact triggered mass extinction, mega-tsunamis and a spell of global warming that lasted for around...

CMS candidate collision event for a W boson decaying into a muon (red line) and a neutrino that escapes detection (pink arrow). Image credit: CMS / CERN.

CERN Physicists Measure Mass of W Boson

Sep 18, 2024 by News Staff

In the Standard Model of particle physics, the masses of the carriers of the weak interaction, the W and Z bosons, are uniquely related. Physics beyond...

Siraj & Loeb explore the possibility that accretion flares resulting from the tidal disruption of small Oort Cloud bodies by a putative primordial black hole could power an observable optical signal that could be searched for with the upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time. Image credit: Sci-News.com / Zdeněk Bardon / ESO.

Primordial Black Holes Could Be Detected Thanks to Their Influence on Solar System Planets

Sep 18, 2024 by News Staff

Primordial black holes are one of the strongest candidates for the Universe’s dark matter. In this scenario, their abundance would be large enough for...

The polymers applied to the reflective surface trap the photon gas in a parabola of light. The narrower this parabola is, the more one-dimensionally the gas behaves. Image credit: University of Bonn.

Physicists Create One-Dimensional Photon Gas

Sep 9, 2024 by News Staff

In their experiments, physicists at the University of Bonn and the University of Kaiserslautern-Landau observed the dimensional crossover from one to two...

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