basic_notions:mass
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basic_notions:mass [2017/08/27 16:54] jakobadmin [Why is it interesting?] |
basic_notions:mass [2018/10/11 15:38] (current) jakobadmin [Intuitive] |
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| ====== Mass ====== | ====== Mass ====== | ||
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| + | <tabbox Intuitive> | ||
| + | |||
| + | * [[ftp://srdconsulting.com/USB_BackUp/Data/Articles/QFT/Strassler/MassEnergy/OkunMass.pdf|The Concept of Mass]] by Lev Okun | ||
| + | * https://gravityandlevity.wordpress.com/2009/05/16/the-equivalence-of-mass-and-energy-the-center-of-energy/ | ||
| + | * http://nautil.us/issue/54/the-unspoken/physics-has-demoted-mass | ||
| + | * [[https://arxiv.org/abs/1206.7114|Origins of Mass]] by Wilzeck | ||
| + | | ||
| + | <tabbox Concrete> | ||
| + | See: [[http://www.hysafe.org/science/KareemChin/PhysicsToday_v42_p31to36.pdf|The Concept of Mass]] by Okun | ||
| + | |||
| + | <tabbox Abstract> | ||
| + | |||
| + | * For a nice description see [[https://arxiv.org/abs/0911.1013|Mass in Quantum Yang-Mills Theory]] by L. D. Faddeev | ||
| + | |||
| + | ---- | ||
| + | |||
| + | |||
| + | <blockquote>In classical physics, mass is a conserved quantity, as | ||
| + | has been experimentally demonstrated by Lavoisier (around 1790). In SR mass | ||
| + | conservation is no longer valid—as has been shown in the 1930s by more accurate experimental techniques—and is superseded by energy-momentum conservation, as has been most vividly demonstrated in Alamogordo in 1945.<cite>Gauge Theory of Gravity and Spacetime by Friedrich W. Hehl</cite></blockquote> | ||
| + | |||
| <tabbox Why is it interesting?> | <tabbox Why is it interesting?> | ||
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| <cite>From "The Infinity Puzzle", by Frank Close</cite> | <cite>From "The Infinity Puzzle", by Frank Close</cite> | ||
| </blockquote> | </blockquote> | ||
| - | <tabbox Layman> | ||
| - | <note tip> | + | <tabbox FAQ> |
| - | Explanations in this section should contain no formulas, but instead colloquial things like you would hear them during a coffee break or at a cocktail party. | + | |
| - | </note> | + | |
| - | + | ||
| - | <tabbox Student> | + | |
| - | <note tip> | + | --> Can we explain masses in QFT?# |
| - | In this section things should be explained by analogy and with pictures and, if necessary, some formulas. | + | |
| - | </note> | + | |
| - | + | ||
| - | <tabbox Researcher> | + | |
| - | <note tip> | + | <blockquote>QFT is not a theory which ”creates” masses of model-defining fields. The |
| - | The motto in this section is: //the higher the level of abstraction, the better//. | + | masses of those free fields which define the first order interaction density) are, |
| - | </note> | + | together with the coupling strengths, free parameters5 |
| - | + | . The only ”dynamic” | |
| - | --> Common Question 1# | + | masses are those of bound states created by acting with interacting composite |
| - | + | fields on the vacuum state but unfortunately there is no perturbative methods | |
| - | + | which describes bound states. space<cite>https://arxiv.org/pdf/1612.00003.pdf</cite></blockquote> | |
| <-- | <-- | ||
| - | --> Common Question 2# | + | -->What's the interpretation of mass in QFT?# |
| - | + | see https://physics.stackexchange.com/questions/56903/the-interpretation-of-mass-in-quantum-field-theories | |
| - | <-- | + | |
| - | + | ||
| - | <tabbox Examples> | + | |
| - | --> Example1# | ||
| - | |||
| - | |||
| <-- | <-- | ||
| - | |||
| - | --> Example2:# | ||
| - | |||
| - | |||
| - | <-- | ||
| - | | ||
| - | <tabbox History> | ||
| - | |||
| </tabbox> | </tabbox> | ||
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