Control_Regions.htmlControl Regions: What Are They?

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In summary, control regions are areas of study that are used to ensure proper modeling of data in simulations. They are orthogonal to signal regions and are expected to have no signal present. A Drell-Yan control region, for example, requires low missing ET and a dilepton mass around the Z boson's peak to check selection efficiencies for WW production.
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ChrisVer
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What are control regions? Is it a different name for "signal region"?
If yes I don't really understand what they mean with the following:
In order to ensure that simulation is properly modeling the data, several control regions which are orthogonal to the signal regions are investigated.
http://www-cdf.fnal.gov/physics/ewk/wwllll/
 
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No, as your quote states, they are orthogonal to the signal regions. It means that you expect no signal there and so you can try to use them to see if you understand your background.
 
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Strange, then why would a Drell-Yan control region require low missing ET and dilepton mass around the Z boson's one?
 
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It is one of the control regions for WW production. With low missing ET and a mass around the Z peak the contribution from WW is negligible, and you can check selection efficiencies.
 
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1. What are control regions?

Control regions are non-coding DNA sequences located near or within a gene that act as regulatory elements to control the expression of that gene.

2. How do control regions work?

Control regions contain specific binding sites for proteins called transcription factors. These transcription factors bind to the control regions and either enhance or repress the expression of the gene.

3. What is the importance of control regions?

Control regions play a crucial role in regulating gene expression, which is essential for the proper functioning of cells and organisms. They allow for precise control of when and where a gene is expressed, which is necessary for development and maintaining homeostasis.

4. Can control regions be mutated?

Yes, control regions can be mutated, which can lead to changes in gene expression and potentially result in diseases or disorders. Mutations in control regions can affect the binding of transcription factors, altering the regulation of gene expression.

5. How do scientists study control regions?

Scientists use a variety of techniques to study control regions, such as DNA sequencing, chromatin immunoprecipitation (ChIP), and reporter gene assays. These methods allow for the identification and characterization of control regions and their role in gene regulation.

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