"Renormalization"의 두 판 사이의 차이
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<h5 style="margin: 0px; line-height: 2em;">electroweak renormalization</h5> | <h5 style="margin: 0px; line-height: 2em;">electroweak renormalization</h5> | ||
− | * spontaneous local symmetry breaking or Higgs mechanism<br> | + | * spontaneous local [[search?q=symmetry%20breaking&parent id=3693987|symmetry breaking]] or Higgs mechanism<br> |
− | * mass term for gauge field is zero in the Lagranaian, but these bosons have mass<br> | + | * mass term for gauge field is zero in the Lagranaian, but these bosons (W,Z bosons) have mass term. To resolve this, we employ Higgs mechanism<br> |
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2011년 10월 12일 (수) 12:30 판
renormalization
- way of pulling out sensible answers from Feynman diagrams that explode
- there are two parts in the renormalization program
- regularization - the divergences must be written down in some way so that they can be compared, added and subtracted
- renormalization proper - the various divergences must be gathered together and extracted from the rest of the calculation
- regularization - the divergences must be written down in some way so that they can be compared, added and subtracted
regularization
- root of the problem
- probability of creating particles of colossal energies
- in terms of Feynman diagrams, the momentum in a loop can run away to infinity
- probability of creating particles of colossal energies
- dimensional regularization
- regularization scheme (especially good in QCD)
- regard the dimension as a continuous quantity
- coupling constant changes accordingly as the dimension changes continuously
- we get a new parameter called regularization scheme
- regularization scheme (especially good in QCD)
QED renormalization
electroweak renormalization
- spontaneous local symmetry breaking or Higgs mechanism
- mass term for gauge field is zero in the Lagranaian, but these bosons (W,Z bosons) have mass term. To resolve this, we employ Higgs mechanism
books
- Renormalization: an introduction to renormalization, the renormalization John C. Collins
- 찾아볼 수학책
- http://gigapedia.info/1/
- http://gigapedia.info/1/
- http://gigapedia.info/1/
- http://gigapedia.info/1/
- http://www.amazon.com/s/ref=nb_ss_gw?url=search-alias%3Dstripbooks&field-keywords=