2(2S+1)-Component Model and its Connection with Other Field Theories

TL;DR

This paper reviews the 2(2S+1)-component formalism for high-spin particles, discusses recent problems, and presents new results connecting this approach with other field theories, highlighting its historical and theoretical significance.

Contribution

It revisits the forgotten Joos-Weinberg formalism, addresses recent issues, and provides new insights into its connection with other field theories, expanding understanding of high-spin particle descriptions.

Findings

Analysis of the Joos-Weinberg formalism for high-spin particles.

Discussion of recent problems in the formalism.

Presentation of new results linking the formalism with other field theories.

Abstract

This talk presents the review of forgotten but attractive formalism proposed by Joos and Weinberg in the sixties for description of high-spin particles. Problems raised in the recent works [Ahluwalia {\it et al.}] are discussed. New results obtained by the author in his preceding papers ["Hadronic J.", 1993, v. 16, No. 5, pp. 423-428; No. 6, pp. 459-467; Preprints IFUNAM FT-93-19, 24, 35] are reported. In {\it Appendix}, bibliography of publications related with mentioned $2(2S+1)$- component formalism is presented.