advanced_notions:elementary_particles
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advanced_notions:elementary_particles [2017/09/10 17:20] jakobadmin [History] |
advanced_notions:elementary_particles [2018/04/09 10:46] tesmitekle [FAQ] |
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| ====== Elementary Particles ====== | ====== Elementary Particles ====== | ||
| - | <tabbox Why is it interesting?> | ||
| - | <tabbox Layman?> | + | <tabbox Intuitive> |
| - | + | ||
| - | [[http://www.ejsme.net/articles/52/523.pdf|Why not start with quarks? Teachers investigate a learning unit on | + | |
| - | the subatomic structure of matter with 12-year-olds]] by Gerfried J. Wiener, Sascha M. Schmeling and Martin Hopf | + | |
| + | * A nice overview is given here: https://profmattstrassler.com/articles-and-posts/particle-physics-basics/the-known-apparently-elementary-particles/ | ||
| + | * [[http://www.ejsme.net/articles/52/523.pdf|Why not start with quarks? Teachers investigate a learning unit on the subatomic structure of matter with 12-year-olds]] by Gerfried J. Wiener, Sascha M. Schmeling and Martin Hopf | ||
| + | * [[https://gravityandlevity.wordpress.com/2015/04/11/how-big-is-an-electron/|How big is an electron?]] by Brian Skinner | ||
| | | ||
| - | <tabbox Student> | + | <tabbox Concrete> |
| + | {{ :advanced_notions:elemparticles.png?nolink |}} | ||
| + | |||
| + | ---- | ||
| <blockquote> | <blockquote> | ||
| In the 1970’s, high energy physicists pursued Lie algebra theory as a valuable tool to characterize all the gauge interactions. These are now understood to be SU(3) for the strong force (which describes the interacations between quarks, which are the constituents of hadrons such as the proton), and SU(2) × U(1) for both the weak and electromagnetic interactions of quarks and leptons (such as the electron). This is an important feature of the standard model of particle physics [YM,We,Sa,Gl]. Grand unification was an effort to combine these symmetries as subgroups of a unifying group such as SU(5). Superstring unification provides an alternative mechanism to combine symmetries. | In the 1970’s, high energy physicists pursued Lie algebra theory as a valuable tool to characterize all the gauge interactions. These are now understood to be SU(3) for the strong force (which describes the interacations between quarks, which are the constituents of hadrons such as the proton), and SU(2) × U(1) for both the weak and electromagnetic interactions of quarks and leptons (such as the electron). This is an important feature of the standard model of particle physics [YM,We,Sa,Gl]. Grand unification was an effort to combine these symmetries as subgroups of a unifying group such as SU(5). Superstring unification provides an alternative mechanism to combine symmetries. | ||
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| <cite>https://arxiv.org/pdf/hep-th/9601117.pdf</cite> | <cite>https://arxiv.org/pdf/hep-th/9601117.pdf</cite> | ||
| </blockquote> | </blockquote> | ||
| - | <tabbox Researcher> | + | |
| + | <blockquote> | ||
| + | Recall that in the flat spacetime case the particle states are labeled by the Poincar´e label (p, λ), whose values are closely related to the UIR label (m, s); m is used to define the mass-shell condition and s determines the range of λ. We identified m with the mass of the field quanta, and s with the spin. In a group theoretical sense, we associate these parameters with the eigenvalues of the Casimir operators (see section 3.5). | ||
| + | |||
| + | <cite>http://thep.housing.rug.nl/sites/default/files/theses/Master%20thesis_Marco%20Boers.pdf</cite> | ||
| + | </blockquote> | ||
| + | |||
| + | <tabbox Abstract> | ||
| + | * http://math.ucr.edu/home/baez/qg-spring2003/elementary/ | ||
| + | * See http://physics.stackexchange.com/questions/33350/particle-as-a-representation-of-the-lorentz-group | ||
| + | * [[http://www.pnas.org/content/99/1/33.full.pdf|A closer look at the elementary fermions]] by Maurice Goldhaber | ||
| <blockquote> | <blockquote> | ||
| Line 33: | Line 46: | ||
| </blockquote> | </blockquote> | ||
| - | + | <tabbox Why is it interesting?> | |
| - | <tabbox Examples> | + | |
| - | --> Example1# | + | Elementary particles are the fundamental building blocks and also responsible for the fundamental interactions like electromagnetism. |
| + | <tabbox FAQ> | ||
| - | + | --> How large is an elementary particle?# | |
| - | <-- | + | |
| - | --> Example2:# | + | See https://axelmaas.blogspot.de/2018/02/how-large-is-elementary-particle.html?m=1 |
| + | <-- | ||
| - | + | -->Why do physicists believe that particles are pointlike?# | |
| + | see https://physics.stackexchange.com/questions/41676/why-do-physicists-believe-that-particles-are-pointlike | ||
| <-- | <-- | ||
| | | ||
advanced_notions/elementary_particles.txt · Last modified: 2018/04/14 10:08 by aresmarrero
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