13-16 August 2019
Kane Hall 225
US/Pacific timezone

[YSF] Freeze-in and Freeze-out of Dark Matter with Charged Long-lived Partners

Not scheduled
Walker-Ames (Kane Hall 225)


Kane Hall 225

Young Scientist Forum Long-lived particles


Ms Sreemanti Chakraborti (Indian Institute of Technology, Guwahati, India)


We present a novel framework capable of addressing the dark matter problem through freeze-in and freeze-out mechanisms, separately or together depending on the region of the parameter space considered. Apart from the fermionic dark matter candidate, the model features two charged partners, one fermionic and another scalar, which often have delayed decays leading to distinct features of such long-lived particles in the colliders like the LHC. Our analysis shows that the model is compatible with observation for masses in the 100 GeV to TeV range. The not-so-slow production of the dark matter particle with the otherwise over-abundant case tamed through sizable annihilation cross section is a distinct characteristic of this scenario, which is not present in the usual Feebly Interacting Massive Particle (FIMP) freeze-in scenarios. A bonus feature is the requirement of a heavy neutrino leading to Type-I seesaw mechanism without disturbing the dark matter side.

Primary authors

Ms Sreemanti Chakraborti (Indian Institute of Technology, Guwahati, India) Prof. Poulose Poulose (Indian Institute of Technology, Guwahati, India) Prof. Victoria Martin (University of Edinburgh, UK)

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