Effects of Threshold Energy on Reconstructions of Properties of Low-Mass WIMPs in Direct Dark Matter Detection Experiments

TL;DR

This paper improves model-independent methods for reconstructing low-mass WIMP properties in dark matter detection by incorporating realistic threshold energy effects, with numerical validation via Monte Carlo simulations.

Contribution

It introduces modified reconstruction formulas that account for threshold energy and applies them to low-mass WIMPs, enhancing accuracy over previous models.

Findings

Threshold energy significantly affects WIMP property reconstruction.

Modified formulas improve reconstruction accuracy for low-mass WIMPs.

Monte Carlo simulations validate the effectiveness of the new methods.

Abstract

In this paper, we revisit our model-independent methods developed for reconstructing properties of Weakly Interacting Massive Particles (WIMPs) by using measured recoil energies from direct Dark Matter detection experiments directly and take into account more realistically non-negligible threshold energy. All expressions for reconstructing the mass and the (ratios between the) spin-independent and the spin-dependent WIMP-nucleon couplings have been modified. We focus on low-mass (m_chi <~ 15 GeV) WIMPs and present the numerical results obtained by Monte Carlo simulations. Constraints caused by non-negligible threshold energy and technical treatments for improving reconstruction results will also be discussed.