Measurement of the relative fraction of t$$\bar{t}$$ events produced via gluon fusion in p$$\bar{p}$$ collision at √s = 1.96 TeV at CDF
- Rutgers Univ., New Brunswick, NJ (United States)
In this thesis we present a measurement of the relative fraction of t$$\bar{t}$$ events produced via gluon-fusion to the total number of t$$\bar{t}$$ events. Using the kinematics of the production and decay of the top and antitop quark pair, we trained a Neural Network to discriminate the gluon-fusion events. The Neural Network was then used as a template to fit for the gluon-fusion fraction in data. Using a total integrated luminosity of 955 pb-1 we find σ(gg→t$$\bar{t}$$)/σ(p$$\bar{p}$$→t$$\bar{t}$$) < 0.33 at 68% confidence level and σ(gg→t$$\bar{t}$$)/σ(p$$\bar{p}$$→t$$\bar{t}$$) < 0.61 at 95% confidence level.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 915127
- Report Number(s):
- FERMILAB-THESIS--2007-18
- Country of Publication:
- United States
- Language:
- English
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