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## Anomalous Currents

*VOLOVIK GRIGORY E.*

### in The Universe in a Helium Droplet

- Published in print:
- 2009
- Published Online:
- January 2010
- ISBN:
- 9780199564842
- eISBN:
- 9780191709906
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780199564842.003.0019
- Subject:
- Physics, Condensed Matter Physics / Materials, Particle Physics / Astrophysics / Cosmology

Parity violation, the asymmetry between left and right, is one of the fundamental properties of the quantum vacuum of the Standard Model. This effect is strong at high energy on the order of the ... More

## Quantized Dirac Fields

*Carlo Giunti and Chung W. Kim*

### in Fundamentals of Neutrino Physics and Astrophysics

- Published in print:
- 2007
- Published Online:
- January 2010
- ISBN:
- 9780198508717
- eISBN:
- 9780191708862
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198508717.003.0002
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology

This chapter discusses the physics of quantized Dirac fields with detailed treatment of Dirac equation, representations of gamma matrices, products of gamma matrices, relativistic covariance (boosts, ... More

## Applications

*Leon Mestel*

### in Stellar Magnetism: Second Edition

- Published in print:
- 2012
- Published Online:
- May 2012
- ISBN:
- 9780199641741
- eISBN:
- 9780191738609
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780199641741.003.0003
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology

This chapter discusses in greater detail some of the topics introduced in Chapter 2. It covers magnetosonic waves; magnetohydrodynamic shocks; self-gravitating systems and the virial theorems; ... More

## Dynamo processes in stars

*Leon Mestel*

### in Stellar Magnetism: Second Edition

- Published in print:
- 2012
- Published Online:
- May 2012
- ISBN:
- 9780199641741
- eISBN:
- 9780191738609
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780199641741.003.0006
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology

The term ‘dynamo action’ appears in the literature describing two related but distinct processes. When the velocity v of a conducting fluid is driven by the non-magnetic forces in the direction ... More

## Applications

*Leon Mestel*

### in Stellar Magnetism

- Published in print:
- 2003
- Published Online:
- January 2010
- ISBN:
- 9780198526728
- eISBN:
- 9780191707049
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198526728.003.0003
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology

In addition to the Alfv èn wave, field-freezing and the consequent Lorentz force yield fast and slow magnetoacoustic waves, and magnetohydrodynamic shocks. The integral scalar and tensorial virial ... More

## The Weak Interactions

*J. Iliopoulos and T.N. Tomaras*

### in Elementary Particle Physics: The Standard Theory

- Published in print:
- 2021
- Published Online:
- December 2021
- ISBN:
- 9780192844200
- eISBN:
- 9780191926983
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780192844200.003.0018
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology, Theoretical, Computational, and Statistical Physics

We present the phenomenology of the weak interactions in a historical perspective, from Fermi’s four-fermion theory to the V−A current×current interaction. The experiments of C.S. Wu, which ... More

## Introduction to scattering amplitudes

*David A. Kosower*

### in Integrability: From Statistical Systems to Gauge Theory: Lecture Notes of the Les Houches Summer School: Volume 106, June 2016

- Published in print:
- 2019
- Published Online:
- September 2019
- ISBN:
- 9780198828150
- eISBN:
- 9780191866937
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198828150.003.0004
- Subject:
- Physics, Theoretical, Computational, and Statistical Physics

This chapter covers the new on-shell methods that have been developed over the past twenty years for computing scattering amplitudes in quantum field theory. These methods break free from the ... More

## The Dirac equation

*Tom Lancaster and Stephen J. Blundell*

### in Quantum Field Theory for the Gifted Amateur

- Published in print:
- 2014
- Published Online:
- June 2014
- ISBN:
- 9780199699322
- eISBN:
- 9780191779435
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780199699322.003.0037
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology

The Dirac equation for an electron is introduced. This chapter describes the gamma-matrices necessary for formulating this and also the concepts of chirality and helicity. The basis states are called ... More

## Acceleration Kernel

*Bahram Mashhoon*

### in Nonlocal Gravity

- Published in print:
- 2017
- Published Online:
- July 2017
- ISBN:
- 9780198803805
- eISBN:
- 9780191842313
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198803805.003.0003
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology, Theoretical, Computational, and Statistical Physics

The phenomenon of spin-rotation coupling provides the key to the determination of the kernel. Imagine an observer rotating in the positive sense about the direction of propagation of an incident ... More

## Helicity decomposition of metric perturbations

*Michele Maggiore*

### in Gravitational Waves: Volume 2: Astrophysics and Cosmology

- Published in print:
- 2018
- Published Online:
- May 2018
- ISBN:
- 9780198570899
- eISBN:
- 9780191817182
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198570899.003.0009
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology

Decomposition of the perturbations over FRW into scalar, vector and tensor perturbations. Physical and unphysical degrees of freedom. Gauge-invariant metric perturbations, Bardeen variables. ... More

## The Gluon

*Michael E. Peskin*

### in Concepts of Elementary Particle Physics

- Published in print:
- 2019
- Published Online:
- November 2019
- ISBN:
- 9780198812180
- eISBN:
- 9780191850301
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198812180.003.0010
- Subject:
- Physics, Particle Physics / Astrophysics / Cosmology, Theoretical, Computational, and Statistical Physics

This chapter describes the description of the proton as a bound state of partons. After a review of the properties of parton distribution functions, it introduces the evidence for a component of the ... More

## Electron-Positron Annihilation

*Michael E. Peskin*

### in Concepts of Elementary Particle Physics

- Published in print:
- 2019
- Published Online:
- November 2019
- ISBN:
- 9780198812180
- eISBN:
- 9780191850301
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198812180.003.0008
- Subject:

This chapter works out the theory of electron-positron annihilation to muon pairs as a model for electron-positron annihilation to quarks. It explains that this naive model provides a good ... More

## Fermions and the Dirac equation

*Michael Kachelriess*

### in Quantum Fields: From the Hubble to the Planck Scale

- Published in print:
- 2017
- Published Online:
- February 2018
- ISBN:
- 9780198802877
- eISBN:
- 9780191841330
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198802877.003.0008
- Subject:

Starting from the spinor representation of the Lorentz group,Weyl spinors and their transformation properties are derived. The Dirac equation and the properties of its solutions are discussed. ... More

## Scattering processes

*Michael Kachelriess*

### in Quantum Fields: From the Hubble to the Planck Scale

- Published in print:
- 2017
- Published Online:
- February 2018
- ISBN:
- 9780198802877
- eISBN:
- 9780191841330
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198802877.003.0009
- Subject:

The unitarity of the S-matrix is used to derive the optical theorem. The connection between Green functions and scattering amplitudes given by the LSZ reduction formula is derived. The trace and the ... More

## Rotations and Lorentz transformations

*Joseph F. Boudreau and Eric S. Swanson*

### in Applied Computational Physics

- Published in print:
- 2017
- Published Online:
- February 2018
- ISBN:
- 9780198708636
- eISBN:
- 9780191858598
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198708636.003.0014
- Subject:
- Physics, Theoretical, Computational, and Statistical Physics

A computational approach to rotations and Lorentz transformation is presented. The discussion starts with the mathematical properties of the rotation and the proper orthochronous Lorentz groups. ... More

## Vorticity and Turbulence

*Rick Salmon*

### in Lectures on Geophysical Fluid Dynamics

- Published in print:
- 1998
- Published Online:
- November 2020
- ISBN:
- 9780195108088
- eISBN:
- 9780197561034
- Item type:
- chapter

- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780195108088.003.0007
- Subject:
- Earth Sciences and Geography, Geophysics: Earth Sciences

Turbulence is an immense and controversial subject. Chapters 4, 5, and 6 present some ideas from turbulence theory that are relevant to flow in the oceans and atmosphere. In this chapter, we ... More

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