# Symmetries in Elementary Particle Physics

## 1st Edition

### 1964 International School of Physics Ettore Majorana, a CERN-MPI-NATO Advanced Study Institute

**Editors:**A Zichichi

**eBook ISBN:**9781483261812

**Imprint:**Academic Press

**Published Date:**1st January 1965

**Page Count:**442

## Description

Symmetries in Elementary Particle Physics focuses on the processes, methodologies, advancements, and reactions in elementary particle physics.

The selection first offers information on symmetry principles in particle physics and vector and axial currents under first order symmetry breaking. Discussions focus on restrictions following from charge conjugation; non-renormalization theorem for the vector current octet; second class amplitudes for leptonic decays; and discrete symmetry operations. The text then takes a look at methods for assigning spin and parity to baryon resonances and general review of neutrino physics.

The publication examines momentum spectrum of positrons from muon decay and the status of strong electromagnetic and weak interactions. Topics include basic physics, conservation laws, question of dynamics, and existential questions.

The selection is a dependable reference for readers interested in the symmetries in elementary particle physics.

## Table of Contents

Table of Contents

Opening Speech

"La fisica ed il progresso del pensiero scientifico attraverso i secoli"

Lectures

Symmetry Principles in Particle Physics

I: Invariance in Quantum Theory

II: Discrete Symmetry Operations

III: The Yang-Mills Field

Bibliography

Elements of SU4

I: Introduction and Basic Ideas

II: Properties of SU3 Representations

III: Degeneracy and Tensorial Methods

IV: The Matrices for Baryons and Mesons and Yukawa Couplings

V: The Mass Formula: Medium Strong Splittings

VI: The Electromagnetic Mass Splittings

VII: Decimet Decay Widths and Summary

References

Consequences of SU3 Symmetry in Weak Interactions

1st Lecture

2nd Lecture

3rd Lecture

4th Lecture

5th Lecture

6th Lecture

Vector and Axial Currents Under First Order Symmetry Breaking

I: The Current Octets

II: First Class and Second Class Amplitudes

III: Charge Conjugation on an Octet

IV: First Order Symmetry Breaking

V: Restrictions Following From Charge Conjugation

VI: First Class Covariants

VII: Second Class Covariants

VIII: First Class Amplitudes For Leptonic Decays

IX: Second Class Amplitudes For Leptonic Decays

X: Electromagnetic Amplitudes

XI: A Non-Renormalization Theorem for the Vector Current Octet

XII: Bosons

XIII: Currents with Indefinite Charge Conjugation

References

Fractionally Charged Particles and SU6

I: The Sakata Model and its Modification

II : The Ace Model

III : A Symmetry Higher than SU3

References

SU4

I Representations of SU4

II Mass Formulae

III Weak Interactions

References

Some Properties of the Sun Representation

Suggested Bibliography

Possible Consequences of the K2°→π+π‾ Decay

I: Phenomenology of K decays (an Outline)

II: The K° - K° System

III: Are KO's an Isolated System?

IV CP Violation in K2° Decays

V: CP Violation in Weak Interactions, Leptonic Decays

Appendix - CP Invariance and SU3

References

SEMINARS

Methods for Assigning Spin and Parity to Baryon Resonances

I: Determination of the Spin And Parity of Baryon Resonances. Method of Byers and Fenster

II: Decay From A Statistical Mixture of Spin States; Density Matrices For Y

*and Y*

III: Intensity Distribution

IV: Angular Distribution of the Polarization of Y

V: Lorentz Frames in Which to Measure The Decay of Yand Y

III: Intensity Distribution

IV: Angular Distribution of the Polarization of Y

V: Lorentz Frames in Which to Measure The Decay of Y

VI: Restrictions on the TLM

VII: Summary of Procedure For Spin Parity Determination

VIII: Background Interference

References

General Review of Neutrino Physics

Separation of Events Into Elastic

And Inelastic

Recognition of Elastic Events

The Inelastic Events

To What Level Can We Say that ѵμ≠ѵe

Neutral Currents

W-.Intermediate Vector Bosons

References

Future Experiments in Neutrino Physics

Measurement of the Angular Correlation of Electrons Relative to λ Spin in λ°-ẞ Decay

Momentum Spectrum of Positrons From Muon Decay

Discussions

Discussion I

Discussion II

Discussion III

Discussion IV

Discussion V

Discussion VI

Closing Lecture

Present Status of Strong Electromagnetic and Weak Interactions

I: Basic Physics

II: Conservation Laws

III: Existential Questions

IV: The Question of Dynamics

V: Advice for the Future

List of Participants

## Details

- No. of pages:
- 442

- Language:
- English

- Copyright:
- © Academic Press 1965

- Published:
- 1st January 1965

- Imprint:
- Academic Press

- eBook ISBN:
- 9781483261812