baryon

"So there was a 'missing matter' problem going back over 20 years: where is the gas, where are the baryons, that aren't collapsed into stars and galaxies?" "That's why we worried about it," he added.

The density of baryons found by researchers, when extrapolated to the entire universe, accounts for about 30 percent of ordinary matter.

Examples of such unstable states can be found in the Standard Model of particle theory including quarks, heavy gauge bosons, leptons heavier than the electron, baryons heavier than the proton, and all mesons made up from a quark and an antiquark.

Yet, there is one gaping omission--the complete lack of what humans, stars, gas, and galaxies are made of: ordinary matter (or in astronomers' slang, "baryons").

Among their topics are a schematic model of baryons and mesons, on the way from sakatons to quarks, from symmetries to quarks and beyond, insights and puzzles in particle physics, the analytical determination of the quantum chromodynamic quark masses, quark mass hierarchy and flavor mixing puzzles, quark elastic scattering as a source of high transverse momentum mesons, exclusive processes and the fundamental structure of hadrons, lessons from supersymmetry: "instead-of-confinement" mechanisms, and quarks and a unified field theory of nature's fundamental forces.

the matter that makes up stars, planets, gas and dust), or 'baryons', whereas 26.8% is the mysterious and unseen 'dark' matter and 68.3% is the even more mysterious 'dark energy'.

mesons, baryons and their antiparticles, which are composed of quarks [16].

The particles are baryons, each of which is composed of three quarks -- a word taken from James Joyce's "Finnegan's Wake'' -- and held together by the so-called "strong'' force.

Migliari said that if baryons can be accelerated to relativistic speeds, these systems should be strong sources of gamma rays and neutrino emission.

Baryons are particles, such as protons and neutrons, that make up more than 99.9 percent of the mass of atoms found in the cosmos.