@article{a5c099280df14c47b228e31d5f75e4c9,
title = "On Lorentz-invariant spin-2 theories",
abstract = "We construct Lorentz-invariant massless and massive spin-2 theories in flat spacetime. Starting from the most generic action of a rank-2 symmetric tensor field whose Lagrangian contains up to quadratic in first derivatives of a field, we investigate the possibility of new theories by using the Hamiltonian analysis. By imposing the degeneracy of the kinetic matrix and the existence of subsequent constraints, we classify theories based on the number of degrees of freedom and constraint structures and obtain a wider class of Fierz-Pauli theory as well as massless and partially massless theories, whose scalar and/or vector degrees of freedom are absent. We also discuss the relation between our theories and known massless and massive spin-2 theories.",
author = "Atsushi Naruko and Rampei Kimura and Daisuke Yamauchi",
note = "Funding Information: We would like to thank Claudia de Rham, Kazuya Koyama, and Nobuyoshi Ohta for fruitful discussions and useful suggestions. This work was supported in part by JSPS Grant-in-Aid for Scientific Research No. JP17K14276 (R. K.), No. JP25287054 (R. K.), No. 17K14304 (D. Y.). A. N. is supported in part by a Japan Science and Technology Agency (JST) grant “Establishing a Consortium for the Development of Human Resources in Science and Technology.” The work of A. N. is also partly supported by the JSPS Grant-in-Aid for Scientific Research No. 16H01092. Publisher Copyright: {\textcopyright} 2019 authors. Published by the American Physical Society.",
year = "2019",
month = apr,
day = "15",
doi = "10.1103/PhysRevD.99.084018",
language = "English",
volume = "99",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "8",
}