基本粒子及其相互作用：概念和唯象论 [Elementary Particles and Their Interactions:Concepts and Phenomena] epub pdf mobi txt 电子书 下载 2024

基本粒子及其相互作用：概念和唯象论 [Elementary Particles and Their Interactions:Concepts and Phenomena] epub pdf mobi txt 电子书 下载 2024

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基本粒子及其相互作用：概念和唯象论 [Elementary Particles and Their Interactions:Concepts and Phenomena] epub pdf mobi txt 电子书 下载 2024

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内容简介

The last few decades have seen major advances in the physics of elementary particles. New generations of particle accelerators and detectors have come into operation, and have successfully contributed to improving the quantity and quality of data on diverse interaction processes and to the discoveries of whole new families of particles. At the same time, important new ideas have emerged in quantum field theory, culminating in the developments of theories for the weak and strong interactions to complement quantum electrodynam-ics, the theory of the electromagnetic force. The simplest of the new theories that are at the same time mathematically consistent and physically successful constitute what is known as the standard model of the fundamental interac-tions. This book is an attempt to present these remarkable advances at an elementary level, making them accessible to students familiar with quantum mechanics, special relativity, and classical electrodynamics.

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目录

1 Particles and Interactions：An Overview
1．1 A Preview
1．2 Particles
1．2．1 Leptons
1．2．2 Quarks
1．2．3 Hadrons
1．3 Interactions
1．4 Symmetries
1．5 Physical Units
Problems
Suggestions for Further Reading

2 B080n Fields
2．1 Lorentz Symmetry
2．1．1 Lorentz TraIlsformations
2．1．2 Tensor Algebra
2．1．3 llensor Fields
2．2 Scalar Fields
2．2．1 Space-Time Translation of a Scalar Field
2．2．2 Lorentz Transformation of a Scalar Field
2．3 Vector Fields
2．4 The Klein-Gordon Equation
2．4．1 Free-Patticle Solutions
2．4．2 Particle Probability
2．4．3 Second Quantization
2．4．4 Operator Algebra
2．4．5 Physical Significance of the Fock Operators
2．5 Quantized Vector Fields
2．5．1 Maesive Vector Fields
2．5．2 The Maxwell Equations
2．5．3 Quantization of the Electromagnetic Field
2．5．4 Field Energy and Momentum
2．6 The Action
2．6．1 The Euler-Lagrange Equation
2．6．2 Conserved Current
Problems
Suggestions for Further Reading

3 Fermion Fields
3．1 The Dirac Equation
3．2 Lorentz Symmetry
3．2．1 Covariance of the Dirac Equation
3．2．2 Spin of the Dirac Field
3．2．3 Bilinear Covariants
3．3 Free．Particle Solutions
3．3．1 Normalized Spinors
3．3．2 Completeness Relations
3．3．3 Helicities
3．4 The Lagrangian for a Free Dirac Particle
3．5 Quantization of the Dirac Field
3．5．1 Spins and Statistics
3．5．2 Dirac Field Observables
3．5．3 F0ck Space
3．6 Zero-Mass Fermions
Problems
Suggestions for Further Reading

4 Collisions and Decays
4．1 Interaction Representation
4．1．1 The Three Pictures
4．1．2 Time E：volution in the Interaction Picture
4．1．3 The S．matrix
4．2 Cross．Sections and Decay Rares
4．2．1 General Formulas
4．2．2 Two-Body Reaction to Two-Body Final States
4．2．3 Decay Rates
4．3 Interaction Models
4．4 Decay Modes of Scalar Particles
4．4．1 Neutral Decay Mode
4．4．2 Charged Decay Mode
4．5 Pion Scattering
4．5．1 The Scalar Boson Propagator
4．5．2 Scattering Processes
4．5．3 Summary and Generalization
4．6 Electron-Proton Scattering
4．6．1 The Electromagnetic Interaction
4．6．2 Electron-Proton Scattering Cross-Section
4．7 Electron-Positron Annihilation
4．8 Compton Scattering
Problems
Suggestions for Further Reading

5 Discrete Symmetries
5．1 Parity
5．1．1 Parity in Quantum Mechanics
5．1．2 Parity in Field Theories
5．1.3 Parity and Interactions
5．2 Time Inversion
5．2．1 Time Inversion in Quantum Mechanics
5．2．2 Time Inversion in Field Theories
5．2．3丁and Interactions
5．3 Charge Conjugation
5．3．1 Additive Quantum Numbers
5．3．2 Charge Conjugation in Field Theories
5．3．3 Interactions
5．4 The CPT Theorem
5．4．1 Implications of CPT Invariance
5．4．2 C．P，T．and CPT
Problems
Suggestions for Further Reading

6 Hadtons and Isospln
6．1 Charge Symmetry and Charge Independence
6．2 Nucleon Field in Isospin Space
6．3 Pion Field in Isospin Space
6．4 G．Parity
6．4．1 Nucleon and Pion Fields
6．4．2 Other Unflavored Hadrons
6．5 Isospin of Strange Particles
6．6 Isospin Violations
6．6．1 Electromagnetic Interactions
6．6．2 Wlealc Interactions
Problems
Suggestions for Further Reading

7 Quarks and SU(3)Symmetry
7．1 Isospin：SU(2) Symmetry
7．2 Hypercharge：SU(31 Symmetry
7．2．1 The Fundamental Representation
7．2．2 Higher．Dimensional Representations
7．2．3 Physical Significance of F3 and F3
7．2．4 3×3*Equal Mesons
7．2．5 3×3×3 Equal Baryons
7．3 Mass Splitting of the Hadron Multiplets
7．3．1 Baryons
7．3．2 Mesons
7．4 Including Spin：SU(6)
7．4．1 Mesons
7．4．2 Baryons
7．4．3 Application：Magnetic Moments of Hadrons
7．5 The Color of Quarks
7．6 The New Particles
7．6．1 J／tf，and Charm
7．6．2 The TaU Lepton
7．6．3 From Bottom to ToP
Problems
Suggestions for Further Reading

8 Gauge Field Theories
8．1 Symmetries and Interactions
8．2 Abelian Gauge Invariance
8．3 Non．Abelian Gauge Invariance
8．4 Quantum Chromodynamics
8．5 Spontaneous Breaking of Global Symmetries
8．5．1 The Basic Idea
8．5．2 Breakdown ofDiscrete Symmetry
8．5．3 Breakdown of Abelian Symmetry
8．5．4 Breakdown of Non-Abelian Symmetry
8．6 Spontaneous Breaking ofLocal Symmetries
8．6．1 Abelian Symmetry
8．6．2 Non．Abelian Symmetry
Problems
Suggestions for Further Reading

9 The Standard Model of the Electroweak Interaction
9．1 The Wleak Interaction Before the Gauge Theories
9．2 Gauge．Invariant Model of One．Lepton Family
9．2．1 Global Symmetry
9．2．2 Gauge Invariance
……

精彩书摘

1.4 SymmetriesThe recent history of physics gives us several examples that illustrate theimportance of the symmetry considerations in explaining empirical observa.tions or in developing new ideas .Thus，the intriguing regularities found in the atomic periodic table can be naturally explained as resulting from the rotational symmetry that characterizes atoms in their ground states；similarly，the relativity theory owes the clarity and the elegance of its fornmlation toits guiding principle，Lorentz in variance .However，more than any other field，particle physics，perhaps because of the very nature of the subject or becauseof the absence of relevant macroscopic analogies or useful classical correspon.dences，has by necessity conferred upon the symmetry concept a key role that has become essential in fornmlating new theories.The existence of the Q-particle and the reality of quarks are two outstanding demonstrations of thepower of this line of reasoning.but no less impressive is the prediction of theexistence of the electronic neutrino by Wolfgang Pauli back in 1 930 solely onthe basis of the conservation of energy, momentum，and angular nlomentum，the validity of which was still in doubt at the time.Pauli took a road less traveled by and opened up a whole new world. The prominent place taken by the symmetry considerations throughout this book only reflects their importance in particle physics.In this section .we will sketch a general picture of the idea. and briefly define various symmetry operations. As we have seen above .every particle js identified by a set of quantumnumbers.These numbers summarize the intrinsic properties of the particleand，for this reason，are called the internal quantum numbers，meaning thatthey have nothing to do with the kinetic state of the particle.which is de.scribed by other conserved quantities that depend on the state the particleis in，such as the energy,momentum，or angular momentum. The existence of a quantum number in a system always arises from theinvariance of the system under a qlobal geometrical transformation.that is。one that does not depend on the coordinates of the space.time point whereit is applied.A simple example suffices to illustrate the general situation.Consider two particles in a refefence frame iu which their interaction energydepends only on the relative distance of the particles.It follows then，first，that a displacement of the origin of the coordinates by an arbitrary distanceproduces no measurable physical effects on the system，and second，that thetotal momentum of the system remains constant in time because its rate ofchange，given by the total gradient of the interaction energy，is strictly zero.So，generally.if we have a physicaI system in which the absolute positions arenot observable fits energy depending off the relative distance rather than in.dividual particle positionsl and if we apply on it a geometrical transformation（spatial translation），then we obtain as direct consequences the invariance ofthe systern to the applied transformation（translational invariance）and theexistence of

基本粒子及其相互作用：概念和唯象论 [Elementary Particles and Their Interactions:Concepts and Phenomena] epub pdf mobi txt 电子书 下载 2024

基本粒子及其相互作用：概念和唯象论 [Elementary Particles and Their Interactions:Concepts and Phenomena] 下载 epub mobi pdf txt 电子书 2024

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是一本需要量子场论知识的粒子物理书籍。

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读书可以使自己的知识得到积累，君子学以聚之。总之，爱好读书是好事。让我们都来读书吧。在书的海洋里遨游也是一种无限快乐的事情。读书养性，读书可以陶冶自己的性情，使自己温文尔雅，具有书卷气；从书中，你往往可以发现自己身上的不足之处，使你不断地改正错误，摆正自己前进的方向。书也是我们的良师益友。 多读书，可以让你变聪明，变得有智慧去战胜对手。书让你变得更聪明，你就可以勇敢地面对困难。让你用自己的方法来解决这个问题。这样，你又向你自己的人生道路上迈出了一步。 多读书，也能使你的心情便得快乐。读书也是一种休闲，一种娱乐的方式。 其实读书有很多好处,就等有心人去慢慢发现.最大的好处是可以让你有属于自己的本领靠自己生存。多读书，可以让你多增加一些课外知识。培根先生说过：“知识就是力量。这种力量可以激励着你不断地前进，不断地成长。读书可以调节身体的血管流动，使你身心健康。[QY]所以用读书来为自己放松心情也是一种十分明智的。 读书能陶冶人的情操，给人知识和智慧。所以，我们应该多读书，为我们以后的人生道路打下好的、扎实的基础！读书破万卷，下笔如有神，多读书可以提高写作能力，写文章就才思敏捷”不错，多读书，增长了课外知识，可以让你感到浑身充满了一股力量。旧书不厌百回读，熟读深思子自知，读书可以提高理解能力，只要熟读深思，你就可以知道其中的道理了；

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从概念讲起，提供粒子物理世界完整的介绍，并有高能唯象理论的阐述。打算先看完其他入门教材再读这本书。

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