User:Sophie/CE: Difference between revisions
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Conversion electrons can be generated in two ways: | Conversion electrons can be generated in two ways: | ||
* as | * as endpoints (CEEndpoint) assuming a coherent mono-energetic electron emitted at 104.97 MeV/c | ||
* including leading log radiative corrections (see literature). | * including leading log radiative corrections (see literature). | ||
In the latter case are 10 % of the electrons are in a low momentum tail shifted away from the endpoint. | In the latter case are 10 % of the electrons are in a low momentum tail shifted away from the endpoint. | ||
In the figure below we see the generated spectra for the two cases on a log scale: | |||
[[File:CEMLL.png|512px|center|compares CE and CELL.]] | [[File:CEMLL.png|512px|center|compares CE and CELL.]] | ||
Revision as of 19:08, 13 December 2024
Channel Description
CE stands for Conversion Electron. This is the primary signal we are searching for at Mu2e. Therefore, ensuring an accurate generator is crucial to us understanding what our signal could look like in our detectors.
Literature
- R. Szafron: https://inspirehep.net/files/ca391cf43844ae4f84155c354c510260 describes the leading log corrected spectrum we use in Mu2e/Offline and Production.
Generator
Conversion electrons can be generated in two ways:
- as endpoints (CEEndpoint) assuming a coherent mono-energetic electron emitted at 104.97 MeV/c
- including leading log radiative corrections (see literature).
In the latter case are 10 % of the electrons are in a low momentum tail shifted away from the endpoint.
In the figure below we see the generated spectra for the two cases on a log scale:
Functional Form
.
where most of the terms have their usual meaning and Emax is the conversion energy and W (Ee) is the non-universal part of the correction.