TY - JOUR
T1 - Causal propagation of a charged spin 3/2 field in an external electromagnetic background
AU - Porrati, Massimo
AU - Rahman, Rakibur
PY - 2009/8/6
Y1 - 2009/8/6
N2 - We present a Lagrangian for a massive, charged spin 3/2 field in a constant external electromagnetic background, which correctly propagates only physical degrees of freedom inside the light cone. The Velo-Zwanziger acausality and other pathologies such as loss of hyperbolicity or the appearance of unphysical degrees of freedom are avoided by a judicious choice of nonminimal couplings. No additional fields or equations besides the spin 3/2 ones are needed to solve the problem.
AB - We present a Lagrangian for a massive, charged spin 3/2 field in a constant external electromagnetic background, which correctly propagates only physical degrees of freedom inside the light cone. The Velo-Zwanziger acausality and other pathologies such as loss of hyperbolicity or the appearance of unphysical degrees of freedom are avoided by a judicious choice of nonminimal couplings. No additional fields or equations besides the spin 3/2 ones are needed to solve the problem.
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U2 - 10.1103/PhysRevD.80.025009
DO - 10.1103/PhysRevD.80.025009
M3 - Article
AN - SCOPUS:69249124914
SN - 1550-7998
VL - 80
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 2
M1 - 025009
ER -