Bound State

The J particle; a nitroglycerin engine

Physicists from the STAR Collaboration have observed the antimatter hypernucleus antihyperhydrogen-4 -- composed of an antihyperon, an antiproton and two antineutrons -- in collisions of atomic nuclei.

Quantum electrodynamics (QED) atoms are composed of unstructured and point-like lepton pairs bound together by the electromagnetic force.

New particle at last! Physicists detect the first "glueball". Glueballs are an unusual, unconfirmed Standard Model prediction, suggesting bound states of gluons alone exist. We just found our first….

MIT researchers discovered "neutronic" molecules, in which neutrons can be made to cling to quantum dots, held just by the strong force. The finding may lead to new tools for probing material properties at the quantum level and exploring new kinds of quantum information processing devices.

Is this where dark matter is hiding in plain sight?

New research from North Carolina State University and Michigan State University opens a new avenue for modeling low-energy nuclear reactions, which are key to the formation of elements within stars. The research lays the groundwork for calculating how nucleons interact when the particles are electrically charged.

Here in our Universe, almost every combination of fundamental particles you can imagine will lead to an unstable state. Anything containing a strange, charm, bottom, or top quark will decay in…

The observation of elusive, exotic particles is the key objective of countless studies, as it could open new avenues for research, while also improving present knowledge of the matter contained in the universe and its underlying physics. The quark model, a theoretical model introduced in 1964, predicted the existence of elementary subatomic particles known as quarks in their different configurations.

Researchers at the University of Basel and Lund University have generated superconducting pair states of electrons on several segments of a nanowire, separated by grown barriers. Depending on the height of the barriers, these pair states can be coupled and fused.

Albert Einstein's stimulated emission theory has been validated by large amounts of light, but never before by individual photons—until now.

A rapid and programmable amplitude modulator based on the thermo-optical effect has been demonstrated by integrating transparent microheaters with metasurfaces.

No matter what physical system we consider, nature always obeys the same fundamental laws. Must it be this way, and if so, why?

The international LHCb collaboration at the Large Hadron Collider (LHC) has observed three never-before-seen particles: a new kind of "pentaquark" and the first-ever pair of "tetraquarks", which includes a new type of tetraquark. The findings, presented today at a CERN seminar, add three new exotic members to the growing list of new hadrons found at the LHC. They will help physicists better understand how quarks…

A research team led by Prof. Wang Junfeng from the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences (CAS) has developed a new one-dimensional (1D) fluorine-19 (19F) nuclear magnetic resonance (NMR)-based method for rapid detection of Arf6 guanine nucleotide exchange factor (GEF) activity.

Scientists studying particle collisions at the Relativistic Heavy Ion Collider (RHIC) have revealed how certain particle-jets lose energy as they traverse the unique form of nuclear matter created in these collisions. The results, published in Physical Review C, should help them learn about key "transport properties" of this hot particle soup, known as a quark-gluon plasma (QGP).

How the unstable muon could revolutionize experimental particle physics. Particle physics needs a new collider to supersede the Large Hadron Collider. Muons, not electrons or protons, might hold the key..

This new particle is so small it makes an atom look enormous.

For over a decade, the CMS Collaboration, a large team of researchers based at different institutes worldwide, has been analyzing data collected at the Compact Muon Solenoid, a general-purpose particle detector at CERN's Large Hadron Collider (LHC). This large-scale international scientific collaboration has been trying to observe various elusive physical phenomena, including exotic particles and dark matter…

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 the existence of a new bound state, labeled X(1880).