Physics News

Physicists Searching for Heaviest and Smallest QED Atom: True Tauonium

An artist’s impression of true tauonium. Image credit: Fu et al., doi: 10.1016/j.scib.2024.04.003.
May 15, 2024 by Enrico de Lazaro

Quantum electrodynamics (QED) atoms are composed of unstructured and point-like lepton pairs bound together by the electromagnetic force. An artist’s impression of true tauonium. Image credit: Fu et al., doi: 10.1016/j.scib.2024.04.003. “QED atoms are formed of lepton pairs by electromagnetic interactions, similar to hydrogen formed of a proton and an electron,” said Beihang University physicist Jing-Hang Fu and colleagues. “Their properties...

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Decay scheme of potassium-40. Image credit: Stukel et al., doi: 10.1103/PhysRevLett.131.052503.

Physicists Observe Rare Nuclear Decay of Potassium Isotope

May 8, 2024 by News Staff

Physicists with the Potassium Decay (KDK) Collaboration have made the first direct observations of a very rare but critical decay path of potassium-40...

Kharintsev et al. found that photons can obtain substantial momentum, similar to that of electrons in solid materials, when confined to nanometer-scale spaces in silicon. Image credit: Kharintsev et al.

Scientists Discover New Property of Light

May 7, 2024 by News Staff

A team of physicists and chemists has discovered a previously unknown way in which light interacts with matter, a finding that could lead to improved solar...

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.

Researchers Focus on Potential ‘Cosmic Glitch’ in Gravity

May 1, 2024 by News Staff

In a paper published in the Journal of Cosmology and Astroparticle Physics, scientists examined the theoretical and observational cases for a ‘cosmic...

Dark photons are hypothetical dark sector particles proposed as a force carrier similar to the photon of electromagnetism but potentially connected to dark matter. Image credit: University of Adelaide.

New Computer Simulations Support Dark Matter Theory

Apr 30, 2024 by News Staff

New research led by the University of California, Irvine addresses a fundamental debate in astrophysics: Does invisible dark matter need to exist to explain...

Monopole pair production via the Schwinger mechanism. Image credit: MoEDAL Collaboration / CERN.

CERN Physicists Zero In On Hypothetical Magnetic Monopoles

Apr 29, 2024 by News Staff

American theoretical physicist Joseph Polchinski once said the existence of magnetic monopoles is ‘one of the safest bets that one can make about physics...

Preparation of goldene. Image credit: Kashiwaya et al., doi: 10.1038/s44160-024-00518-4.

Scientists Create Single-Atom-Thick Gold: Goldene

Apr 23, 2024 by News Staff

Goldene in the form of gold monolayer sheets has been prepared by etching away titanium carbide (Ti3C2) slabs from titanium gold carbide (Ti3AuC2). Preparation...

CMS event display of a candidate Higgs boson decaying into two photons, one of the two decay channels that were key to the discovery of the particle. Image credit: CERN.

CERN Physicists Release Higgs Boson Discovery Data

Apr 17, 2024 by News Staff

Physicists from the CMS Collaboration at CERN have just publicly released the combination of CMS measurements that contributed to establishing the discovery...

A portrait of the nucleon-antinucleon bound state. Image credit: BESIII Collaboration.

Physicists Find Evidence of New Subatomic Particle

Apr 11, 2024 by News Staff

Physicists with the BESIII Collaboration have observed an anomalous line shape around ppbar mass threshold in the J/ψ→γ3(π+π-) decay, which indicates...

View of an ATLAS collision event in which a candidate W boson decays into a muon and a neutrino; the reconstructed tracks of the charged particles in the inner part of the ATLAS detector are shown as orange lines; the energy deposits in the detector’s calorimeters are shown as yellow boxes; the identified muon is shown as a red line; the missing transverse momentum associated with the neutrino is shown as a green dashed line. Image credit: ATLAS / CERN.

CERN Physicists Measure Width of W Boson

Apr 11, 2024 by News Staff

Physicists from the ATLAS Collaboration have measured the width of the W boson — the electrically charged carrier of the weak force — at CERN’s...

An artist’s impression of LTT 1445Ab in the triple-star system LTT 1445. Image credit: Sci-News.com.

Scientists Discuss Physics and Mathematics behind ‘3 Body Problem’

Apr 10, 2024 by News Staff

Based on the book trilogy Remembrance of Earth’s Past by Chinese computer engineer Cixin Liu, Netflix’s sci-fi television series 3 Body Problem introduces...

Event displays identified by the FASER Collaboration as candidates for an νe (left) and a νμ (right) interacting in the detector; invisible here, the neutrinos arrive from the left and then interact to create multiple tracks spraying out to the right (colored lines), one of which is identified as a charged lepton. Image credit: FASER Collaboration.

CERN Physicists Measure High-Energy Neutrino Interaction Strength

Apr 8, 2024 by News Staff

The Forward Search Experiment (FASER) at CERN’s Large Hadron Collider (LHC) is designed to search for extremely weakly interacting particles. Such particles...

Tang et al. discovered neutronic molecules, in which neutrons can be made to cling to quantum dots, held just by the strong force: the red item represents a bound neutron, the sphere is a hydride nanoparticle, and the yellow field represents a neutron wavefunction. Image credit: Tang et al., doi: 10.1021/acsnano.3c12929.

Scientists Discover ‘Neutronic Molecules’

Apr 8, 2024 by News Staff

Neutrons are subatomic particles that have no electric charge, unlike protons and electrons. That means that while the electromagnetic force is responsible...

Installation of the CMS beam pipe. Image credit: CERN / CMS Collaboration.

CERN Physicists Measure One of Key Parameters of Standard Model

Apr 5, 2024 by News Staff

Physicists with the CMS Collaboration at CERN’s Large Hadron Collider (LHC) have successfully measured the effective leptonic electroweak mixing angle....

An artist’s impression of a neutron star.

Dark Matter Capture and Annihilation Can Heat Old, Isolated Neutron Stars, Physicists Say

Apr 4, 2024 by News Staff

A team of particle physicists from the University of Melbourne, the Australian National University, King’s College London and Fermi National Accelerator...

Structure of SOT spin-LED: controlling the intensity of emitted light and charge current is the basis of transferring and processing information; by contrast, robust information storage and magnetic random-access memories are implemented using the spin of the carrier and the associated magnetization in ferromagnets; the missing link between the respective disciplines of photonics, electronics and spintronics is to modulate the circular polarization of the emitted light, rather than its intensity, by electrically controlled magnetization; Dainone et al. demonstrated that this missing link is established at room temperature and zero applied magnetic field in light-emitting diodes through the transfer of angular momentum between photons, electrons and ferromagnets. Image credit: Dainone et al., doi: 10.1038/s41586-024-07125-5.

Physicists Transfer Electron Spin to Photons

Mar 28, 2024 by News Staff

A team of physicists led by Dr. Yuan Lu from the Université de Lorraine’s Institut Jean Lamour has used electrical pulses to manipulate magnetic information...

Recreated candidate event of a γγ →ττ process in proton-proton collisions measured by the CMS detector. The tau can decay into a muon (red), charged pions (yellow) and neutrinos (not visible); energy deposits in the electromagnetic calorimeter in green and in the hadronic calorimeter in cyan. Image credit: CMS Collaboration.

CERN Physicists Observe Two Photons Producing Two Tau-Leptons in Proton-Proton Collisions

Mar 26, 2024 by News Staff

According to physicists from the CMS Collaboration at CERN’s Large Hadron Collider (LHC), it is the first time that this process has been seen in proton-proton...

The modified Majorana module in the assembly glovebox with germanium detector crystals and tantalum samples installed. Image credit: Majorana Collaboration.

Nuclear Physicists Searching for Decay of Tantalum-180m

Mar 20, 2024 by News Staff

Tantalum-180m (180mTa), a rare isotope of tantalum whose decay has never been observed, is expected to have a lifetime approximately 1 million times longer...

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.

Universe Has No Room for Dark Matter, Astrophysicist Says

Mar 19, 2024 by News Staff

University of Ottawa’s Professor Rajendra Gupta challenges the current theoretical model for the composition of the Universe by showing that, in fact,...

Miassite is one of only four minerals found in nature that act as a superconductor when grown in the lab and the only mineral known so far that reveals unconventional superconductivity in its clean synthetic form. Image credit: Paul Canfield.

Physicists Identify First Unconventional Superconductor with Composition Also Found in Nature

Mar 13, 2024 by News Staff

Solid state chemistry has produced a plethora of materials with properties not found in nature. For example, high-temperature superconductivity in copper-oxide...

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