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On the Decay Analysis of Electroproduced Higher‐Spin Hadrons
Author(s) -
Actor Alfred
Publication year - 1975
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.19750231003
Subject(s) - helicity , physics , hadron , formalism (music) , particle physics , lepton , amplitude , azimuth , electron , transverse plane , nuclear physics , quantum mechanics , art , musical , structural engineering , astronomy , engineering , visual arts
We study exclusive electroproduction of two hadrons where one or both of the hadrons is a higherspin resonance whose decay is analysed. Interesting electroproduction experiments of this type are discussed. A complete formal apparatus is given for the decay analysis of spin‐ J particles produced in this way with polarized or unpolarized electron beams and targets. The cases J = 1, 3/2, 2 and 5/2 are worked out in detail. A conventional helicity frame analysis in terms of s‐channel helicity amplitudes is given. Also we rearrange the formalism for use in the Gottfried‐Jackson frame with everything given in terms of t ‐channel helicity amplitudes. The t ‐channel formalism makes it possible to completely separate the contributions from longitudinal and transverse virtual photon t ‐channel helicity states when only the laboratory azimuthal angle between the lepton and hadron planes is variable.