Quintessence is a possible candidate for dark energy. In this paper we study the phenomenologies of the fermionic partner of quintessence, the quintessino. Our results show that, for suitable choices of the model parameters, the quintessino is a good candidate for cold or warm dark matter. In our scenario, the dark energy and dark matter of the Universe are connected in one chiral superfield.

• Received 3 September 2003

DOI:https://doi.org/10.1103/PhysRevD.69.123521