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- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/zz%3A_Back_Matter/10%3A_13.1%3A_Appendix_J-_Physics_Formulas_(Wevers)/1.15%3A_Quantum_Field_Theory_and_Particle_PhysicsQuantum field theory, field quantization, Klein Gordon equation, standard model
- https://phys.libretexts.org/Bookshelves/Nuclear_and_Particle_Physics/Nuclear_and_Particle_Physics_(Walet)/01%3A_A_History_of_Particle_Physics/1.08%3A_Mesons_Leptons_and_NeutrinosThe \(\pi\) is found (in cosmic rays) and is the progenitor of the \(\mu\)’s that were seen before: \[\pi^{+}\rightarrow \mu^{+}+\nu_{\mu} \nonumber \] The next year artificial pions are produced in a...The \(\pi\) is found (in cosmic rays) and is the progenitor of the \(\mu\)’s that were seen before: \[\pi^{+}\rightarrow \mu^{+}+\nu_{\mu} \nonumber \] The next year artificial pions are produced in an accelerator, and in 1950 the neutral pion is found, \[\pi^{0}\rightarrow \gamma \gamma. \nonumber \] This is an example of the conservation of electric charge.
- https://phys.libretexts.org/Bookshelves/University_Physics/Radically_Modern_Introductory_Physics_Text_II_(Raymond)/20%3A_The_Standard_Model/20.01%3A_Hadrons_and_LeptonsThe standard model of hadrons and leptons is a united set of quantum mechanical theories encompassing electromagnetism; the weak force, which is responsible for beta decay; and the strong force, which...The standard model of hadrons and leptons is a united set of quantum mechanical theories encompassing electromagnetism; the weak force, which is responsible for beta decay; and the strong force, which holds atomic nuclei together. The lepton number is the number of leptons minus the number of antileptons, with a similar definition for baryon number.
- https://phys.libretexts.org/Courses/Prince_Georges_Community_College/General_Physics_I%3A_Classical_Mechanics/64%3A_The_Standard_Model/64.01%3A_MatterQuarks are never observed in isolation: they occur only as a system of three quarks (called a baryon), or as a quark-antiquark pair (called a meson). (An antiquark is a form of antimatter, described b...Quarks are never observed in isolation: they occur only as a system of three quarks (called a baryon), or as a quark-antiquark pair (called a meson). (An antiquark is a form of antimatter, described below.) Examples of baryons are the proton (which consists of two "up" quarks and one "down" quark) and the neutron (which consists of two "down" quarks and one "up" quark).
- https://phys.libretexts.org/Learning_Objects/A_Physics_Formulary/Physics/15%3A_Quantum_Field_Theory_and_Particle_PhysicsQuantum field theory, field quantization, Klein Gordon equation, standard model
