2026-09-19T22:12:05Zhttps://ecommons.cornell.edu/server/oai/requestoai:ecommons.cornell.edu:1813/672422026-05-15T19:48:40Zcom_1813_35col_1813_47
Zientek, Margaret
Wittich, Peter
Thom-Levy, Julia
Grossman, Yuval
2019-10-15T15:28:33Z
2019-10-15T15:28:33Z
2019-05-30
ProQuest Submission ID: 11324
ProQuest Publication ID: 13813928
https://hdl.handle.net/1813/67242
https://doi.org/10.7298/bjhw-8g62
11050223
Results are presented from a search for dark matter particles produced in association with a Higgs boson decaying to two photons in proton-proton collision data collected at a center-of-mass energy of 13 TeV. The search is based on data collected in 2015 and 2016 by the CMS experiment at the CERN Large Hadron Collider. The analyzed data correspond to an integrated luminosity of 2.2/fb and 35.9/fb, respectively. No significant excess over the standard model background expectation is observed. The results are used to constrain at the 95% confidence level dark matter production cross section in the context of two simplified models. A Z' mediator in a Z'-two-Higgs-doublet model with mass between 550 and 860 GeV is excluded for dark matter masses below 100 GeV. Additionally, in a baryonic Z' model, Z' masses below 574 GeV are excluded, for a dark matter mass of 1 GeV. The thesis also explores some of the challenges associated with the upgraded High-Luminosity Large Hadron Collider. One important challenge will be integrating real-time charged particle track finding and reconstruction into a hardware data selection system. A proposed FPGA-based solution that reconstructs tracks within 4 us is discussed.
en_US
Physics
Particle physics
Dark Matter
FPGA
CMS
LHC
Higgs boson
Track reconstruction
Search for dark matter produced in association with a Higgs boson decaying to two photons in proton-proton collisions at 13 TeV with the CMS detector
dissertation or thesis
application/pdf
Physics
Cornell University
Doctor of Philosophy
Ph.D., Physics
https://hdl.handle.net/1813/59810
Publication
Cornell Theses and Dissertations
Zientek, Margaret
5893a6ea-7af3-41d7-abc6-04bcd26ab5df
open.access
open.access
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<Title>Search for dark matter produced in association with a Higgs boson decaying to two photons in proton-proton collisions at 13 TeV with the CMS detector</Title>
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<Abstract>Results are presented from a search for dark matter particles produced in association with a Higgs boson decaying to two photons in proton-proton collision data collected at a center-of-mass energy of 13 TeV. The search is based on data collected in 2015 and 2016 by the CMS experiment at the CERN Large Hadron Collider. The analyzed data correspond to an integrated luminosity of 2.2/fb and 35.9/fb, respectively. No significant excess over the standard model background expectation is observed. The results are used to constrain at the 95% confidence level dark matter production cross section in the context of two simplified models. A Z' mediator in a Z'-two-Higgs-doublet model with mass between 550 and 860 GeV is excluded for dark matter masses below 100 GeV. Additionally, in a baryonic Z' model, Z' masses below 574 GeV are excluded, for a dark matter mass of 1 GeV. The thesis also explores some of the challenges associated with the upgraded High-Luminosity Large Hadron Collider. One important challenge will be integrating real-time charged particle track finding and reconstruction into a hardware data selection system. A proposed FPGA-based solution that reconstructs tracks within 4 us is discussed.</Abstract>
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