Fitting CoGeNT Modulation with an Inelastic, Isospin-Violating $Z'$ Model
Haipeng An, Fei Gao
TL;DR
This paper reanalyzes CoGeNT dark matter data, proposing a $Z'$ model with inelastic, isospin-violating interactions that fit the modulation signal while evading XENON100 constraints, but is limited by collider bounds.
Contribution
It introduces a novel $Z'$ dark matter model that explains CoGeNT modulation data and circumvents existing experimental constraints.
Findings
The $Z'$ model fits the CoGeNT modulation data.
XENON100 constraints can be avoided with this model.
Collider physics constrains the $Z'$ mass to be about twice the dark matter mass.
Abstract
We reanalyze the annual modulation data observed by CoGeNT experiment and show that if the annually modulated anomaly detected by CoGeNT is induced by collision between dark matter particle and nucleus, it can be fitted by a model with inelastic dark matter and isospin-violating interaction, and the constraint from XENON100 can be avoided. This model is strongly constrained by collider physics that the upper bound of the mass of is around twice of the mass of dark matter.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Particle physics theoretical and experimental studies · Cosmology and Gravitation Theories