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Preliminary studies toward Trigger-Level Analysis with Photons in ATLAS

Östman, Leo LU (2018) FYSK02 20181
Particle and nuclear physics
Department of Physics
Abstract
The Trigger-Level Analysis is a strategy for data analysis that enables recording larger amounts of events at the ATLAS experiment than the typical method of reconstructing events offline. This is done by only recording partial information about the event, and using that for analysis. As more events are analysed with this method it can be used to put lower energy constraints on the events that are analysed, meaning that events which would otherwise not pass trigger cuts can be stored.
This work considers a model of dark matter in which dark matter can interact with ordinary matter through a mediator particle. The mediator is of a mass range where it decays into two jets that are unlikely to have enough energy to pass the trigger cuts at a... (More)
The Trigger-Level Analysis is a strategy for data analysis that enables recording larger amounts of events at the ATLAS experiment than the typical method of reconstructing events offline. This is done by only recording partial information about the event, and using that for analysis. As more events are analysed with this method it can be used to put lower energy constraints on the events that are analysed, meaning that events which would otherwise not pass trigger cuts can be stored.
This work considers a model of dark matter in which dark matter can interact with ordinary matter through a mediator particle. The mediator is of a mass range where it decays into two jets that are unlikely to have enough energy to pass the trigger cuts at a significant rate. A Trigger-Level Analysis could potentially probe this region of mediator masses. The work gives a preliminary look into the possibility of using photons for this, in association with dijet events. This shows that photons could potentially be used, as they display a similar performance to jets even without calibration, but will need further studies and methods to remove fake photons at the trigger level. (Less)
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author
Östman, Leo LU
supervisor
organization
course
FYSK02 20181
year
type
M2 - Bachelor Degree
subject
language
English
id
8956089
date added to LUP
2018-08-20 15:49:29
date last changed
2018-08-20 15:49:29
@misc{8956089,
  abstract     = {{The Trigger-Level Analysis is a strategy for data analysis that enables recording larger amounts of events at the ATLAS experiment than the typical method of reconstructing events offline. This is done by only recording partial information about the event, and using that for analysis. As more events are analysed with this method it can be used to put lower energy constraints on the events that are analysed, meaning that events which would otherwise not pass trigger cuts can be stored.
This work considers a model of dark matter in which dark matter can interact with ordinary matter through a mediator particle. The mediator is of a mass range where it decays into two jets that are unlikely to have enough energy to pass the trigger cuts at a significant rate. A Trigger-Level Analysis could potentially probe this region of mediator masses. The work gives a preliminary look into the possibility of using photons for this, in association with dijet events. This shows that photons could potentially be used, as they display a similar performance to jets even without calibration, but will need further studies and methods to remove fake photons at the trigger level.}},
  author       = {{Östman, Leo}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Preliminary studies toward Trigger-Level Analysis with Photons in ATLAS}},
  year         = {{2018}},
}