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Title: Search for WZ+ZZ Production with Missing Transverse Energy and b Jets at CDF

Abstract

Observation of diboson processes at hadron colliders is an important milestone on the road to discovery or exclusion of the standard model Higgs boson. Since the decay processes happen to be closely related, methods, tools, and insights obtained through the more common diboson decays can be incorporated into low-mass standard model Higgs searches. The combined WW + WZ + ZZ diboson cross section has been measured at the Tevatron in hadronic decay modes. In this thesis we take this one step closer to the Higgs by measuring just the WZ + ZZ cross section, exploiting a novel arti cial neural network based b-jet tagger to separate the WW background. The number of signal events is extracted from data events with large E T using a simultaneous t in events with and without two jets consistent with B hadron decays. Using 5:2 fb -1 of data from the CDF II detector, we measure a cross section of (p $$\bar{p}$$ → WZ,ZZ) = 5:8 +3.6 -3.0 pb, in agreement with the standard model.

Authors:
 [1]
  1. Cornell Univ., Ithaca, NY (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1127921
Report Number(s):
FERMILAB-THESIS-2013-01
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Poprocki, Stephen. Search for WZ+ZZ Production with Missing Transverse Energy and b Jets at CDF. United States: N. p., 2013. Web. doi:10.2172/1127921.
Poprocki, Stephen. Search for WZ+ZZ Production with Missing Transverse Energy and b Jets at CDF. United States. doi:10.2172/1127921.
Poprocki, Stephen. Tue . "Search for WZ+ZZ Production with Missing Transverse Energy and b Jets at CDF". United States. doi:10.2172/1127921. https://www.osti.gov/servlets/purl/1127921.
@article{osti_1127921,
title = {Search for WZ+ZZ Production with Missing Transverse Energy and b Jets at CDF},
author = {Poprocki, Stephen},
abstractNote = {Observation of diboson processes at hadron colliders is an important milestone on the road to discovery or exclusion of the standard model Higgs boson. Since the decay processes happen to be closely related, methods, tools, and insights obtained through the more common diboson decays can be incorporated into low-mass standard model Higgs searches. The combined WW + WZ + ZZ diboson cross section has been measured at the Tevatron in hadronic decay modes. In this thesis we take this one step closer to the Higgs by measuring just the WZ + ZZ cross section, exploiting a novel arti cial neural network based b-jet tagger to separate the WW background. The number of signal events is extracted from data events with large ET using a simultaneous t in events with and without two jets consistent with B hadron decays. Using 5:2 fb-1 of data from the CDF II detector, we measure a cross section of (p $\bar{p}$ → WZ,ZZ) = 5:8+3.6 -3.0 pb, in agreement with the standard model.},
doi = {10.2172/1127921},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {1}
}

Thesis/Dissertation:
Other availability
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