DM Exclusion Plots: Investigating WIMP Mass & Cross Section Relations

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In summary, the conversation discusses the relationship between WIMP mass and WIMP cross-section in relation to Dark Matter exclusion plots. The papers referenced show that the cross-section is directly proportional to the reduced mass of the WIMP and target nucleus, but this does not match the monotonically increasing trend seen in exclusion plots. The discrepancy may be due to the fact that exclusion plots are targeted solely at the cross-section and do not take into account theoretical predictions. Additionally, the sensitivity of the detector must be considered when interpreting exclusion plots from experiments.
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tryhard
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I have been working hard to get the Dark Matter exclusion plots.

In most of the papers (arxiv:0808.3607), I found that the relation betweem WIMP mass and WIMP cross section is :

σ is directly proportional to (μ/μp)^2

σ=cross section
μ=reduced mass of WIMP and target nucleus
μp=reduced mass of WIMP and proton.

This clearly gives a monotonically increasing function, which is unlike the DM exclusion plot, which decreases to some value and then increases. Where am I going wrong ??
 
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Exclusion plots are directly targeted at the cross-section - they don't depend on theory predictions for this value. For exclusion plots from experiments, you have to consider the detector sensitivity. Different WIMP masses lead to different energy depositions in the detector, and larger values are easier to detect. On the other hand, the predicted WIMP flux (to relate event rates with a cross-section) depends on the mass of the particle.
 

What are DM exclusion plots?

DM exclusion plots are graphical representations of the results of experiments designed to search for dark matter particles. They show regions of parameter space where certain dark matter models can be excluded based on the lack of observed signal.

How are DM exclusion plots used in investigating WIMP mass and cross section relations?

DM exclusion plots are used to compare the predicted properties of WIMP particles, such as their mass and cross section, with the results of experiments. By looking at the regions of parameter space that are excluded by experiments, scientists can narrow down the possible mass and cross section values for WIMPs.

What is the significance of the shape of a DM exclusion plot?

The shape of a DM exclusion plot can give valuable information about the nature of dark matter. For example, a steeply sloped exclusion curve may indicate a heavier WIMP particle, while a flatter curve may suggest a lighter WIMP.

How are DM exclusion plots affected by experimental uncertainties?

DM exclusion plots are subject to various uncertainties, such as experimental errors and theoretical assumptions. These uncertainties can affect the shape and size of the exclusion regions and may lead to different interpretations of the data.

Are DM exclusion plots the only way to investigate WIMP mass and cross section relations?

No, DM exclusion plots are just one tool used in the search for dark matter. Other methods, such as direct detection experiments and collider experiments, also play a crucial role in investigating WIMP properties.

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