Search for the associate production of Higgs bosons with top anti-top pairs
- Univ. of Manchester (United Kingdom)
This thesis describes the search for the associated production of a Higgs boson with top anti-top pairs in proton anti-proton collisions at a centre-of-mass energy of 1.96 TeV. The data used were collected by the D0 detector during the RunII data taking period which ran from 2001 to 2011 at the Tevatron Collider located at the Fermi National Accelerator Laboratory (or Fermilab). Distributions of theHT variable separated into 3 jet, 5 b-tagging and 2 lepton categories were used as inputs to a modified frequentist limit setting procedure, which was in turn used to search for the t$$\bar{t}$$H process with H→b$$\bar{b}$$. Since this process was not observed, limits were set on the cross section times branching ratio σ(t$$\bar{t}$$H) BR(H → b$$\bar{b}$$) , with an expected (observed) limit of 24.7 (74.3) measured for a Higgs mass value of 125 GeV.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1155868
- Report Number(s):
- FERMILAB-THESIS-2014-09
- Country of Publication:
- United States
- Language:
- English
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Measurement of top anti-top cross section in proton - anti-proton collider at √s = 1.96-TeV