Physics

Physicists Create ‘Featherweight’ Oxygen

A team of nuclear physicists from the Washington University, St. Louis, Michigan State University, Western Michigan University and the University of Connecticut has created and characterized ‘featherweight’ oxygen — the lightest-ever version of the familiar oxygen, with only three neutrons to its eight protons. The results appear in the journal …

Read More »

CERN Physicists Discover New Pentaquark Particle

Physicists from CERN’s Large Hadron Collider beauty (LHCb) Collaboration announced this week the discovery of a new pentaquark particle, Pc(4312)+, decaying to a proton and a J/ψ meson, a particle composed of a charm quark and a charm antiquark. Illustration of the possible layout of the quarks in a pentaquark …

Read More »

Physicists Create Stable ‘Supercrystals’

Stimulation with ultrafast light pulses can realize and manipulate states of matter with emergent structural, electronic and magnetic phenomena. According to a new study, published in the journal Nature Materials, an ultrafast laser pulse plus ‘frustration’ resulted in a new state of matter — a ‘supercrystal.’ A 3D image of …

Read More »

Quantum Tunneling is Near Instantaneous, Experiments Show

Tunneling, a key feature of quantum mechanics, is when a particle that encounters a seemingly insurmountable barrier passes through it, ending up on the other side. A series of experiments carried out by physicists from Griffith University, Lanzhou University, the Australian National University, Drake University and Korea’s Institute for Basic …

Read More »

CERN Physicists Create Long-Lived Positronium

Physicists from the AEgIS (Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy) Collaboration at CERN have found a new way of making long-lived positronium atoms, which consist of an electron and a positron (antimatter counterpart of the electron), for antimatter gravity experiments. Positronium is a hydrogen-like atom consisting of a positron and an …

Read More »

New Charmonium Particle Discovered

Physicists from the Large Hadron Collider beauty (LHCb) Collaboration at CERN have discovered a previously unknown particle that consists of a charm quark and its antimatter counterpart, the charm antiquark. The mass and other properties of the new particle, ψ3(1D), place it squarely in the charmonium family that includes the …

Read More »

Physicists Transform Liquid Metal into Dense Plasma

A team of physicists from the University of Rochester and the Lawrence Livermore National Laboratory has found a way to turn liquid metallic deuterium into a plasma — the fourth fundamental state of matter in the sequence: solid, liquid, gas, and plasma — and to observe the temperature where a …

Read More »

Physicists Create Coldest Quantum Gas of Molecules

Physicists at JILA, a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado Boulder, have produced a gas of potassium-rubidium molecules at temperatures as low as 50 nanokelvin (nK) — that’s 50 billionths of a Kelvin, or just a smidge above absolute zero. …

Read More »