Renormalization of the Spin-dependent WIMP scattering off nuclei
P. C. Divari (Department of Physical Sciences, Applications,, Hellenic Army Academy, Athens Greece), J. D. Vergados (University of, Ioannina, Ioannina, Greece)
TL;DR
This paper investigates how long-range two-body currents affect the spin-dependent WIMP-nucleus scattering amplitude, revealing a target-independent renormalization of the effective nucleon cross section by about 25%.
Contribution
It introduces a method to incorporate long-range two-body currents into WIMP scattering calculations, providing a target-independent correction to the effective coupling.
Findings
Long-range two-body currents cause approximately 25% renormalization.
The effect is essentially independent of the target nucleus.
This renormalization can be treated as a simple adjustment of the effective nucleon cross section.
Abstract
We study the amplitude for the spin-dependent WIMP scattering off nuclei by including the leading long-range two-body currents in the most important isovector contribution. We show that such effects are essentially independent of the target nucleus and, as a result, they can be treated as a mere renormalization of the effective nucleon cross section or, equivalently, of the corresponding effective coupling with values around 25%.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Quantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies