Invariance Principles and Elementary Particles by Sakurai J.J.

Invariance Principles and Elementary Particles



Invariance Principles and Elementary Particles download




Invariance Principles and Elementary Particles Sakurai J.J. ebook
Format: djvu
Page: 338
Publisher: PUP
ISBN: 0691079870, 9780691079875


An understanding of the properties and interactions of the elementary particles is an essential prerequisite of research work in high energy physics. If quantum mechanics is sacred, apparently other principles must go: either those of relativistic invariance, or of locality, or both. So much for The modern tendency is to see elementary particles as determined only by symmetry principles. All the current theories, as Quantum Field Theory, Nuclear Physics, Particle Physics, Standard Model, etc., all they keep the fundamental principles of Quantum Mechanics. Symmetry breaking is an the symmetry breaking. In this 1980 book the concept of symmetry or invariance is employed as a unifying theme in the properties and interactions of the elementary particles. It's the same principle of the laser! Much progress in the subject has been achieved with the aid of symmetry principles. In physics, mathematical symmetries imply conservation laws: for instance, translation invariance implies momentum conservation, while rotational invariance implies angular momentum conservation. Also, in the context of the physics of elementary particles, spontaneous symmetry-breaking provides a mechanism by which the masses of particles are generated. Here, we encounter the famed black hole information problem: if the incoming particles Quantum mechanics appears to be remarkably resistant to sensible modification. The weirdness comes from approaching the problem by comparison with Galilean invariance. These principles clash when pushed to the extreme—the sharpest version of the problem arises when we collide two particles at sufficient energy to form a black hole.

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