[Paper Review] Status of the Search for Supersymmetric Dark Matter

D. Cline|arXiv (Cornell University)|Jun 5, 2003

Dark Matter and Cosmic Phenomena3 citations

TL;DR

This paper reviews the status of direct detection experiments for supersymmetric dark matter, focusing on Weakly Interacting Massive Particles (WIMPs) as the leading candidate. It advocates for large-scale liquid xenon detectors—capable of scaling to one ton—due to their low background and high sensitivity, projecting that such instruments are essential for observing supersymmetric dark matter in the coming decade.

ABSTRACT

We assume the supersymmetric model for dark matter in the universe and our galaxy, and direct methods to distinguish these kinds of dark matter are described. We then focus on the current and future experiment search for SUSY-WIMPS. Theoretical models suggest that a new generation of at least one ton detectors may be required to observe this form of dark matter. We concentrate on Liquid Xenon detectors because they can be scaled to large mass.

Motivation & Objective

• To assess the current experimental status of direct detection for supersymmetric dark matter, particularly WIMPs.
• To evaluate the feasibility and sensitivity of next-generation detectors in identifying supersymmetric dark matter.
• To argue for the necessity of large-scale detectors, specifically one-ton liquid xenon detectors, to achieve sufficient sensitivity.
• To examine the theoretical and experimental challenges in distinguishing supersymmetric WIMPs from background signals.
• To provide a roadmap for future experiments based on current theoretical models and detector technology.

Proposed method

• Analyzes theoretical models of supersymmetric dark matter, particularly the neutralino as a WIMP candidate.
• Reviews direct detection techniques, emphasizing nuclear recoil signatures from WIMP-nucleus interactions.
• Evaluates liquid xenon as a detection medium due to its scalability, low background, and high stopping power.
• Considers the energy threshold and background rejection capabilities of liquid xenon detectors for dark matter searches.
• Estimates required detector mass (at least one ton) based on projected sensitivity and expected WIMP interaction rates.
• Compares the performance of liquid xenon with other detection technologies, highlighting advantages for large-scale deployment.

Experimental results

Research questions

• RQ1 What is the current experimental status of direct detection for supersymmetric WIMPs?
• RQ2 Why are liquid xenon detectors considered optimal for large-scale dark matter searches?
• RQ3 What detector mass is required to achieve sufficient sensitivity to observe supersymmetric dark matter?
• RQ4 How do theoretical models of supersymmetry predict the interaction cross-sections of WIMPs with nuclei?
• RQ5 What are the key background challenges in detecting low-mass WIMPs, and how can they be mitigated?

Key findings

• Liquid xenon detectors are uniquely suited for scaling to one-ton masses, offering high sensitivity and low background.
• Theoretical models suggest that at least one-ton-scale detectors are required to observe supersymmetric WIMPs with confidence.
• Direct detection experiments using liquid xenon can achieve the necessary energy resolution and background suppression for WIMP detection.
• Current and future experiments are approaching the sensitivity threshold needed to probe the most favored supersymmetric parameter space.
• The paper concludes that next-generation experiments must focus on large liquid xenon detectors to make definitive progress in the search for supersymmetric dark matter.
• The projected discovery potential is contingent on achieving both large mass and low energy thresholds in detector design.