To Half--Be or Not To Be?
High Energy Physics - Theory
2023-07-05 v1
Abstract
It has recently been argued that half degrees of freedom could emerge in Lorentz and parity invariant field theories, using a non-linear Proca field theory dubbed Proca-Nuevo as a specific example. We provide two proofs, using the Lagrangian and Hamiltonian pictures, that the theory possesses a pair of second class constraints, leaving degrees of freedom in spacetime dimensions, as befits a consistent Proca model. Our proofs are explicit and straightforward in two dimensions and we discuss how they generalize to an arbitrary number of dimensions. We also clarify why local Lorentz and parity invariant field theories cannot hold half degrees of freedom.
Cite
@article{arxiv.2303.05354,
title = {To Half--Be or Not To Be?},
author = {Claudia de Rham and Sebastian Garcia-Saenz and Lavinia Heisenberg and Victor Pozsgay and Xinmiao Wang},
journal= {arXiv preprint arXiv:2303.05354},
year = {2023}
}