@Article{FortesAlve:2022:AbHiBo,
               author = "Fortes, Hemily Gomes Marciano and Alves, M{\'a}rcio E. S.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Estadual Paulista (UNESP)}",
                title = "Absence of the Higuchi bound in a family of alternative linear 
                         massive spin-2 models",
              journal = "Classical and Quantum Gravity",
                 year = "2022",
               volume = "39",
               number = "15",
                pages = "e155004",
                month = "Aug.",
             keywords = "gravitation, modified theories of gravity, graviton, Higuchi.",
             abstract = "There is a well known result from the Fierz-Pauli (FP) theory in 
                         de Sitter background, it is the existence of a lower bound for the 
                         mass m of the spin 2 particle, the Higuchi bound. It establishes 
                         that m(2) >= 2H(2), where H is the Hubble parameter, in order to 
                         the theory presents no ghost-like instabilities. In this sense, m 
                         should be unacceptable high in order to fulfill this condition at 
                         the time of the inflationary epoch of the Universe, posing a 
                         difficulty to conciliate the FP theory with cosmology. In this 
                         article we show that the Higuchi bound can be circumvented in an 
                         alternative description of massive spin-2 particles known as 
                         L(a(1)) models. In maximally symmetric spaces the theory has two 
                         free parameters which can be consistently chosen in order to make 
                         the model absent of a lower bound for m. Then, m can be 
                         arbitrarily smaller than the energy scale of inflation avoiding 
                         instabilities at that time.",
                  doi = "10.1088/1361-6382/ac7b06",
                  url = "http://dx.doi.org/10.1088/1361-6382/ac7b06",
                 issn = "0264-9381",
             language = "en",
           targetfile = "Fortes_2022_Class._Quantum_Grav._39_155004.pdf",
        urlaccessdate = "06 jun. 2024"
}