Baryons are composite particles made of three quarks, as opposed to mesons, which are composite particles made of one quark and one antiquark. Baryons and mesons are both hadrons, which are particles composed solely of quarks or both quarks and antiquarks. The term baryon is derived from the Greek "βαρύς" (barys), meaning "heavy", because, at the time of their naming, it was believed that baryons were characterized by having greater masses than other particles that were classed as matter. Until a few years ago, it was believed that some experiments showed the existence of pentaquarks – baryons made of four quarks and one antiquark. Prior to 2006 the particle physics community as a whole did not view the existence of pentaquarks as likely. On 13 July 2015, the LHCb collaboration at CERN reported results consistent with pentaquark states in the decay of bottom Lambda baryons (Λ0b). Since baryons are composed of quarks, they participate in the strong interaction. Leptons, on the other hand, are not composed of quarks and as such do not participate in the strong interaction. The best known baryons are the protons and neutrons that make up most of the mass of the visible matter in the universe, whereas electrons, the other major component of atoms, are leptons. Each baryon has a corresponding antiparticle known as an antibaryon in which quarks are replaced by their corresponding antiquarks. For example, a proton is made of two up quarks and one down quark, while its corresponding antiparticle, the antiproton, is made of two up antiquarks and one down antiquark. (Wikipedia).
Lecture 1 | New Revolutions in Particle Physics: Standard Model
(January 11, 2010) Leonard Susskind, discusses the origin of covalent bonds, Coulomb's Law, and the names and properties of particles. This course is a continuation of the Fall quarter on particle physics. The material will focus on the Standard Model of particle physics, especially quant
From playlist Lecture Collection | Particle Physics: Standard Model
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE For years, astronomers have been unable to find up to half of the baryonic matter in the universe. We may just have solved this problem. You can further support us o
From playlist Missing Baryonic Mass Playlist
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Astronomers have finally found evidence to help solve the missing baryon problem, and they're pointing telescopes toward the Intergalactic Medium to figure it out. Hosted by: Hank Green For special, curated artifacts of this universe, check out https://scishowfinds.com/ ---------- Suppor
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Particle Physics (11 of 41) Subatomic Particle (Leptons, Quarks, Higgs, Gravitons) 2
Visit http://ilectureonline.com for more math and science lectures! In this video I will give a more detail discussion of subatomic particles of elementary particles (leptons, anti-leptons, quarks, anit-quarks, Higgs, gravitons) and composite particles (hadrons, baryons, mesons). Next vi
From playlist PHYSICS 65 PARTICLE PHYSICS
This video covers Section 32.6 of Cutnell & Johnson Physics 10e, by David Young and Shane Stadler, published by John Wiley and Sons. The lecture is part of the course General Physics - Life Sciences I and II, taught by Dr. Boyd F. Edwards at Utah State University. This video was produced
From playlist Lecture 32. Ionizing Radiation, Nuclear Energy, and Elementary Particles
(March 4, 2013) Leonard Susskind examines one of the fundamental questions in cosmology: why are there more protons than anti-protons in the universe today? The answer lies in theory of baryogenesis in the very early universe. Originally presented in the Stanford Continuing Studies Progr
From playlist Lecture Collection | Cosmology
Dark Matter (Lecture 1) by Katelin Schutz
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From playlist Physics of the Early Universe - 2022
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From playlist Candles of Darkness
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