Bueno Rogerio, R. J. [UNESP]Hoff da Silva, J. M. [UNESP]Pereira, S. H. [UNESP]Rocha, Roldao da2018-11-262018-11-262016-03-01Epl. Mulhouse: Epl Association, European Physical Society, v. 113, n. 6, 6 p., 2016.0295-5075http://hdl.handle.net/11449/161447In this paper a mass-dimension-one fermionic sigma model, realized by the eigen-spinors of the charge conjugation operator with dual helicity (Elko spinors), is developed. Such spinors are chosen as a specific realization of mass-dimension-one spinors, wherein the non-commutative fermionic feature is ruled by torsion. Moreover, we analyse Elko spinors as a source of matter in a background in expansion and we have found that such kind of mass-dimension-one fermions can serve not only as dark matter but they also induce an effective cosmological constant. Copyright (C) EPLA, 20166engArtigo10.1209/0295-5075/113/60001WOS:000374764700001Acesso abertoWOS000374764700001.pdf