g=2 as the natural value of the tree-level gyromagnetic ratio of elementary particles

Sergio Ferrara, Massimo Porrati, and Valentine L. Telegdi
Phys. Rev. D 46, 3529 – Published 15 October 1992
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Abstract

We implement at the Lagrangian level a "natural" electromagnetic coupling prescription, different from the minimal one, and proposed a long time ago by Weinberg. This prescription yields, for elementary particles of arbitrary-spin, a gyromagnetic ratio g=2 at the tree level. This value is already known to arise in renormalizable theories for spin ½ and spin 1, is suggested by the classical, relativistic equations of the spin polarization, and is also found for arbitrary-spin, charged excitations of the open string.

  • Received 7 April 1992

DOI:https://doi.org/10.1103/PhysRevD.46.3529

©1992 American Physical Society

Authors & Affiliations

Sergio Ferrara* and Massimo Porrati

  • Theory Division, CERN, CH-1211 Geneva 23, Switzerland

Valentine L. Telegdi

  • California Institute of Technology, Pasadena, California 91125

  • *Also at Department of Physics, UCLA, Los Angeles, CA 90024.
  • On leave of absence from INFN, Sezione di Pisa, Pisa, Italy
  • Current address: CERN, PPE Division, CH-1211 Geneva 23, Switzerland.

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Issue

Vol. 46, Iss. 8 — 15 October 1992

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