Search for the Standard Model Higgs boson in the missing energy topology with DØ
- Imperial College, London (United Kingdom)
A search for the Standard Model Higgs boson in the missing energy and acoplanar b-jet topology is reported, using an integrated luminosity of 0.93 fb-1 recorded by the D0 detector at the Fermilab Tevatron p$$\bar{p}$$ Collider. The analysis includes signal contributions from p$$\bar{p}$$ → ZH → v$$\bar{v}$$b$$\bar{b}$$, as well as from WH production in which the charged lepton from the W boson decay is undetected. Neural networks are used to separate signal from background. In the absence of a signal, limits are set on σ(p$$\bar{p}$$ → VH) x B(H → b$$\bar{b}$$) at the 95% C.L. of 2.6-2.3 pb, for Higgs boson masses in the range 105-135 GeV, where V = W, Z. The corresponding expected limits range from 2.8 to 2.0 pb. Potential improvements to the analysis with an extended dataset totalling 4 fb-1 are also discussed. Essential maintenance related to the increased luminosity and RunIIb upgrade was carried out on the impact parameter (IP) based b-tagging trigger tool and the effect of the changes on the b-tagger's performance was investigated.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 966187
- Report Number(s):
- FERMILAB-THESIS-2009-32; TRN: US0904048
- Country of Publication:
- United States
- Language:
- English
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