### Abstract

It is shown that, under accelerator or bubble-chamber conditions, the passage of a particle of arbitrary spin through an electromagnetic field effects a Lorentz transformation on its momentum and polarization, and a linear differential equation determining this transformation is given. We also give explicitly the decay-time dependence of the angular distribution that describes the decay of a particle moving in an electromagnetic field, and thereby obtain a method, explained in detail, of measuring the magnetic moment of an unstable, higher spin particle like the Ω-. It is noted that the gyromagnetic ratio g=2 leads to particularly simple equations of motion for all spins, and not only for spin 1/2. In an appendix we use a novel covariant algebraic method to solve the equations of motion and obtain the finite Lorentz transformation, in the case of a constant and homogeneous electromagnetic field. The method involves the introduction of an algebra of 4-by-4 matrices that plays the same role for 4-vectors as the Dirac algebra for 4-spinors.

Original language | English (US) |
---|---|

Journal | Physical Review |

Volume | 139 |

Issue number | 5B |

DOIs | |

State | Published - 1965 |

### Fingerprint

### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

**Precession of relativistic particles of arbitrary spin in a slowly varying electromagnetic field.** / Zwanziger, Daniel.

Research output: Contribution to journal › Article

*Physical Review*, vol. 139, no. 5B. https://doi.org/10.1103/PhysRev.139.B1318

}

TY - JOUR

T1 - Precession of relativistic particles of arbitrary spin in a slowly varying electromagnetic field

AU - Zwanziger, Daniel

PY - 1965

Y1 - 1965

N2 - It is shown that, under accelerator or bubble-chamber conditions, the passage of a particle of arbitrary spin through an electromagnetic field effects a Lorentz transformation on its momentum and polarization, and a linear differential equation determining this transformation is given. We also give explicitly the decay-time dependence of the angular distribution that describes the decay of a particle moving in an electromagnetic field, and thereby obtain a method, explained in detail, of measuring the magnetic moment of an unstable, higher spin particle like the Ω-. It is noted that the gyromagnetic ratio g=2 leads to particularly simple equations of motion for all spins, and not only for spin 1/2. In an appendix we use a novel covariant algebraic method to solve the equations of motion and obtain the finite Lorentz transformation, in the case of a constant and homogeneous electromagnetic field. The method involves the introduction of an algebra of 4-by-4 matrices that plays the same role for 4-vectors as the Dirac algebra for 4-spinors.

AB - It is shown that, under accelerator or bubble-chamber conditions, the passage of a particle of arbitrary spin through an electromagnetic field effects a Lorentz transformation on its momentum and polarization, and a linear differential equation determining this transformation is given. We also give explicitly the decay-time dependence of the angular distribution that describes the decay of a particle moving in an electromagnetic field, and thereby obtain a method, explained in detail, of measuring the magnetic moment of an unstable, higher spin particle like the Ω-. It is noted that the gyromagnetic ratio g=2 leads to particularly simple equations of motion for all spins, and not only for spin 1/2. In an appendix we use a novel covariant algebraic method to solve the equations of motion and obtain the finite Lorentz transformation, in the case of a constant and homogeneous electromagnetic field. The method involves the introduction of an algebra of 4-by-4 matrices that plays the same role for 4-vectors as the Dirac algebra for 4-spinors.

UR - http://www.scopus.com/inward/record.url?scp=4243379740&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243379740&partnerID=8YFLogxK

U2 - 10.1103/PhysRev.139.B1318

DO - 10.1103/PhysRev.139.B1318

M3 - Article

VL - 139

JO - Physical Review

JF - Physical Review

SN - 0031-899X

IS - 5B

ER -