We suggest the supersymmetric particles contained in the supersymmetric economical 3-3-1 model were produced during the heating time. They have not been thermodynamic equilibrium when it froze out. It leads to the lightest supersymmetric particle can be a good candidate for superheavy dark matter. With assumption the lightest supersymmetric particle is Bino, we show that the correct contribution of the superheavy dark matter (SHDM) species to the present critical density requires the Bino mass is order 1012 GeV and there is not exists a large mass hierarchy of the superpartner in the considered model. | Communications in Physics, Vol. 25, No. 3 (2015), pp. 211-217 DOI: SUPERHEAVY DARK MATTER IN THE SUPERSYMMETRIC ECONOMICAL 3-3-1 MODEL DO THI HUONG Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam E-mail: dthuong@ Received 17 July 2015 Accepted for publication 12 September 2015 Abstract. We suggest the supersymmetric particles contained in the supersymmetric economical 3-3-1 model were produced during the heating time. They have not been thermodynamic equilibrium when it froze out. It leads to the lightest supersymmetric particle can be a good candidate for superheavy dark matter. With assumption the lightest supersymmetric particle is Bino, we show that the correct contribution of the superheavy dark matter (SHDM) species to the present critical density requires the Bino mass is order 1012 GeV and there is not exists a large mass hierarchy of the superpartner in the considered model. Keywords: supersymmetric, superheavy dark matter. There is decided evidence that the dominant component of the matter density in the universe is dark. The most interesting evidence of the existence of dark matter (DM) is the observation of flat rotation for spiral galaxies [2]. Recent experiments (WMAP and PLANCK) have shown [1] a large portion of the total mass-energy of the universe such as dark matter is about 25 percents and 70 percents of dark energy. However, the standard model (SM) fails to prove the origin of DM. So we have to go beyond the SM. In the standard dark matter scenarios, the weak interaction massive particles (WIMPs) are usually considered to have once been in local thermodynamic equilibrium (LTE) and their present abundance depends on their self-annihilation cross section. The largest possible cross section is −2 roughly MDM . This implies that very massive WIMPs would have such a small annihilation cross section that their present abundance would be too large. Hence,
