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Download e-book for iPad: Effective Lagrangians for the Standard Model by Professor Antonio Dobado, Dr. Angel Gómez-Nicola, Dr.

By Professor Antonio Dobado, Dr. Angel Gómez-Nicola, Dr. Antonio L. Maroto, Dr. José R. Peláez (auth.)

ISBN-10: 3642591914

ISBN-13: 9783642591914

ISBN-10: 3642638899

ISBN-13: 9783642638893

This e-book provides an in depth and pedagogical exposition of the potent Lagrangian ideas and their purposes to high-energy physics. It covers the most theoretical rules and describes comprehensively the best way to use them in numerous fields, akin to chiral perturbation conception and the symmetry breaking zone of the traditional version or even low-energy quantum gravity. The publication is written within the language of contemporary quantum box thought. many of the theoretical subject matters taken care of are: decoupling, the Goldstone theorem, the non-linear sigma version, anomalies, the Wess--Zumino--Witten time period, and the equivalence theorem.

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The Green functions encode all the information contained in the theory and, in particular, from them we can calculate all the physical observables. The Green functions can be obtained as functional derivatives n C (Xl,X2, ... ,Xn) = 8n W[J] 1 in 8J(xl)8J(X2) ... 42) where S[= J dxJi(X)

V p = lIP. 23) with p. 24) b) The Poincare Group. 21) plus translations defined as x'p. = xp. + ~p. 1 Classical Symmetries 27 and the corresponding Noether current is TILv = IIr8v cpi _ LgILV . 27) Therefore 8IL TILv = 0 in the classical evolution of the system for translationally invariant actions. TILv is called the canonical energy-momentum tensor. 28) dxToIL , which is the translation generator. 29) where SILVP = IIr Evpcpi. 30) generate the Lorentz transformations. Therefore, for Lorentz invariant actions we find that 8IL MILvp = O.

4). To end this section we will discuss some technical details concerning the metric introduced in K. As it was mentioned before, this metric is G invariant, that is, it has G as isometry group. In general, however, it is not unique. This can be seen as follows. 5)). As a consequence, the NGB transform linearly under the H transformations, but non-linearly under the whole G transformations, as it was the case with the SN NLSM. However, this representation could be reducible. If this is the case, the x a generators decompose in r irreducible sectors X ai with i = 1,2, ...

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Effective Lagrangians for the Standard Model by Professor Antonio Dobado, Dr. Angel Gómez-Nicola, Dr. Antonio L. Maroto, Dr. José R. Peláez (auth.)

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