Physics News

CERN Physicists Measure Width of W Boson

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.
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 Large Hadron Collider (LHC). 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...

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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...

LHCb experiment cavern at LHC IP8 in September 2016. Image credit: CERN.

CERN Physicists Observes New Decay Mode of Charmed Beauty Meson

Mar 11, 2024 by News Staff

Physicists from the LHCb Collaboration at CERN’s Large Hadron Collider (LHC) have reported the first observation of the decay of the Bc+ meson (composed...

The different rotational directions of the various ‘dumbbells’ indicate that the atoms lie in different planes. Image credit: Institute of Applied Physics, University of Bonn.

Physicists Demonstrate New Method for Determining 3D Location of Single Atoms

Mar 5, 2024 by News Staff

The new method, developed by a team of physicists from the University of Bonn and the University of Bristol, makes it possible to precisely determine the...

Position of the new isotopes, osmium-160 and tungsten-156, on the chart of nuclides. Image credit: Huabin Yang.

Physicists Synthesize New Isotopes of Osmium and Tungsten

Feb 20, 2024 by News Staff

A team of physicists in China has synthesized two new isotopes: osmium-160 and tungsten-156. Position of the new isotopes, osmium-160 and tungsten-156,...

Region of the nuclear chart, 69

Physicists Create Five New Isotopes of Thulium, Ytterbium and Lutetium

Feb 19, 2024 by News Staff

Physicists using the Advanced Rare Isotope Separator (ARIS) at the Facility for Rare Isotope Beams (FRIB) have produced, separated, and identified five...

Shuai et al. used a synchronized attosecond X-ray pulse pair (pictured pink and green here) from an X-ray free electron laser to study the energetic response of electrons (gold) in liquid water on attosecond time scale, while the hydrogen (white) and oxygen (red) atoms are ‘frozen’ in time. Image credit: Nathan Johnson, Pacific Northwest National Laboratory.

Physicists Take First Look at Electrons Moving in Real-Time in Liquid Water

Feb 16, 2024 by News Staff

A research team led by Argonne National Laboratory physicists has isolated the energetic movement of an electron while ‘freezing’ the motion of the...

A proton’s valence quarks (blue, red, and green), quark-antiquark pairs, and gluons (springs); scalar gluon activity (pink) extends beyond the electric charge radius (orange) that surrounds the gluonic energy core (yellow). Image credit: Argonne National Laboratory.

Physicists Determine Gluonic Gravitational Form Factors of Proton

Feb 15, 2024 by News Staff

The proton is one of the main building blocks of all visible matter in the Universe. Among its intrinsic properties are its electric charge, mass and spin....

2D display of the quark contribution to the distribution of forces in the proton as a function of the distance from the proton’s center. The light gray shading and longer arrows indicate areas of stronger forces, while the dark shading and shorter arrows indicate areas of weaker forces. Left panel: normal forces as a function of distance from the center; the arrows change magnitude and always point radially outward. Right panel: tangential forces as a function of distance from the center; the force changes direction and magnitude as indicated by the direction and length of the arrow; the forces change sign near 0.4 fm from the proton center. Image credit: Burkert et al., doi: 10.1103/RevModPhys.95.041002.

Physicists Determine Distribution of Strong Force inside Proton

Jan 24, 2024 by News Staff

The physics of the gravitational form factors of the proton, as well as their understanding within quantum chromodynamics, has advanced significantly in...

Cardillo-Zallo et al. report on a nanoscale system consisting of endohedral fullerenes encapsulated within single-walled carbon nanotubes, capable of the delivery and release of krypton atoms on-demand, via coalescence of host fullerene cages under the action of the electron beam (in situ) or heat (ex situ). Image credit: Cardillo-Zallo et al., doi: 10.1021/acsnano.3c07853.

Physicists Create One-Dimensional Noble Gas

Jan 23, 2024 by News Staff

Using advanced transmission electron microscopy (TEM) methods, physicists at the University of Nottingham have successfully trapped atoms of krypton inside...

Xenon nanoclusters between two graphene layers, with sizes between two and ten atoms. Image credit: Manuel Längle.

Physicists Capture Direct Images of Noble Gas Nanoclusters at Room Temperature

Jan 11, 2024 by News Staff

Physicists have, for the first time, directly imaged small clusters of noble gas atoms at room temperature. This achievement opens up exciting possibilities...

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