An Introduction to Gauge Theories and Modern Particle by Elliot Leader, Enrico Predazzi

By Elliot Leader, Enrico Predazzi

Chief and Predazzi have written an exsellent textual content for graduate scholars. They hide the big variety of subject matters in nice readability. particularly within the bankruptcy approximately renormalization they reach proposing the center intimately with no technical obfuscation.

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Extra resources for An Introduction to Gauge Theories and Modern Particle Physics 2 Volume Hardback Set (Cambridge Monographs on Particle Physics, Nuclear Physics and Cosmology) (Vol.1)

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Notational conventions xxix but if the colour of the quark is labelled j (j = 1, 2, 3) then what is implied is J. f E qfi (x)ryµgfj(x). ) On Tuesday 26 and Wednesday 27 April 1994 nearly simultaneous press conferences in the USA, Italy and Japan announced that evidence for the top quark had been found by the CDF collaboration at Fermilab. In fact most of the information had by then already appeared in a long article in The New York Times and rumours about the discovery had been circulating for some time.

5. For strangeness-changing semileptonic processes h' (x) only allows AS = +0Q and IASI < 1. 3 The spin and isospin structure 15 Fig. 6. Modern electroweak theory version of Fig. 5. 12c Fig. 7. Transitions involved in Gell-Mann's test of CVC. following processes IASI = 2, 74 n+e-+Pe, K+ 74 7f+ + 7f+ + e- + 1/e, AS = -OQ = -1, E+74 n+e++ve, AS = -OQ = 1, whereas, for example, the following reactions are seen to occur A-p+e +ve, OS=0Q=1, A-p+p-+PN,, OS=0Q=1, E--*n+e-+1/e, OS=LQ=1. For an excellent discussion of the physics of weak interactions see Wu and Moskowski (1966).

We shall generally assume that universality holds and that r, p, e behave identically in their weak interactions. Further tests will be discussed in later chapters. 2 The need for a gauge theory In this chapter we examine some of the problems inherent in the currentcurrent form of the weak interaction Lagrangian, and are led to the idea of the weak force being mediated by the exchange of vector mesons. This picture too runs into difficulties which, however, can be alleviated in gauge-invariant theories.

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