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  • Attenuation through the Earth and resulting modulation signal (nb: likely an intensive theoretical task)

  • Understanding of influence of usual detector effects

  • Influence of energy thresholds

  • Influence of geographical position

  • Influence of a particular target (NaI and/or LAB)

Planning

Process

Info

Signature

Selection

Background rate

Limits on signal rate

Limits on model parameters

Current limits

Theo

Theo

Exp

Exp

Exp

Inelastic scattering of BDM as investigated by COSINE-100

See below papers.

High energy interactions in both LS and NaI

Energy of the LS > 4 MeV

No tagged muons

Total energy of the NaI > 4 MeV

No alpha events in the NaI

The background muon flux can mimic the BDM signal.

Total expected muon flux
= 3.7e-8 cm-2s-1 (from Guangyong)

Approximate area of the experiment is
= 8*1.2*104 cm2

Giving a total muon flux of
= 308.88 counts/day

or 336034 counts over 3 years.

limit = 1.645 * sqrt(2*bg)

= 1348 counts over 3 years

= 1.23 counts/day

Note: This is a very pessimistic estimate and the muon detectors should tag a significant number of these muons, reducing the background. Better estimates/simulations of the muon background and veto efficiency can further refine this limit.

Theo

Theo

Reference material

Inelastic Boosted Dark Matter - https://arxiv.org/abs/1811.09344

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