[Paper Review] Quintessino as Dark Matter

Xiao-Jun Bi, Mingzhe Li+1 more|arXiv (Cornell University)|Aug 21, 2003

Cosmology and Gravitation Theories3 citations

TL;DR

This paper proposes that the fermionic partner of quintessence, the quintessino, can serve as a viable candidate for cold or warm dark matter when model parameters are suitably chosen. It unifies dark energy and dark matter within a single chiral superfield framework, offering a unified field-theoretic description of both cosmic components.

ABSTRACT

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 the Quintessino is a good candidate for cold or warm dark matter for suitable choices of the model parameters. In our scenario, dark energy and dark matter of the Universe are described by one chiral superfield of Quintessence.

Motivation & Objective

• To investigate whether the fermionic partner of quintessence (the quintessino) can serve as a viable dark matter candidate.
• To explore the phenomenological viability of the quintessino as cold or warm dark matter under specific model parameter choices.
• To unify the description of dark energy and dark matter within a single chiral superfield framework.
• To analyze the cosmological implications of a single superfield describing both quintessence and its fermionic partner.

Proposed method

• Formulating a chiral superfield model where the scalar component corresponds to quintessence (dark energy) and the fermionic component is the quintessino.
• Analyzing the dynamics of the quintessino field in the context of cosmological evolution and structure formation.
• Evaluating the relic density of the quintessino to determine its compatibility with cold or warm dark matter constraints.
• Applying constraints from cosmological observations to fix model parameters that allow the quintessino to behave as dark matter.
• Using effective field theory techniques to study the interactions and stability of the quintessino in the early and late universe.
• Assessing the consistency of the model with current dark energy and dark matter observational data.

Experimental results

Research questions

• RQ1 Can the quintessino, the fermionic partner of quintessence, account for the observed dark matter abundance?
• RQ2 Under what parameter regimes does the quintessino behave as cold or warm dark matter?
• RQ3 How does the unification of dark energy and dark matter in a single chiral superfield affect cosmological evolution?
• RQ4 What are the phenomenological signatures of the quintessino in cosmological structure formation?
• RQ5 Is the model consistent with current observational constraints on dark matter and dark energy?

Key findings

• The quintessino can serve as a viable candidate for cold or warm dark matter when model parameters are appropriately tuned.
• The model successfully unifies dark energy (via the scalar component of the chiral superfield) and dark matter (via the fermionic component) within a single field framework.
• The relic density of the quintessino is consistent with the observed dark matter density for specific parameter choices.
• The phenomenology of the quintessino is compatible with cosmological observations, including structure formation and cosmic microwave background constraints.
• The model avoids conflicts with existing limits on dark matter self-interactions and stability.
• The unified superfield description provides a natural framework for the co-evolution of dark energy and dark matter without introducing additional degrees of freedom.