Open superstring first mass level effective Lagrangian: Massive spin-3/2 fields in an electromagnetic background
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2023-04-10
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We derive fully explicit equations of motion, and the associated set of constraints, describing the propagation in a flat space-time of a charged spin-3/2 massive state in a constant electromagnetic background. For this purpose, we provide the Lagrangian for the physical fermionic fields in the first massive level of the open superstring. We first write a compact Lagrangian, allowing a simple derivation of the equations of motion and constraints. Then another one is given that yields directly a decoupled system of equations, though the fields of different spins look coupled at the level of the Lagrangian.
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 839.