Production and Electrical Characterization Tests of the ISL Detector and a Trigger Design for Higgs Boson Searches at CDF
- Valencia U.
This thesis is structured as follows: Chapter 1. gives a brief review of the Higgs mechanism in the Standard Model and the electroweak symmetry breaking. The Standard Model Higgs boson phenomenology at Tevatron energies is reviewed. Chapter 2. describes the upgraded Fermilab laboratory accelerator complex, and the upgraded CDF detector. Chapter 3. gives a brief overview of the more relevant aspects of the silicon detectors, and the ISL is described in detail. Chapter 4. describes the construction of the ISL ladders, the full custom testing setup (functionality tests, laser test, burn-in test and $$\beta$$-source measurements), and the problems encountered during the ISL ladders construction. The procedures for ladder grading are also discussed. Chapter 5. describes the multilevel trigger system of the CDF detector, and the trigger primitives available at each level. The most relevant offine event observables are briefly discussed. In Chapter 6 the procedures to estimate the trigger rate and trigger effciency calculation are described. The particularities of triggering in $$p\bar{p}$$ collisions at high luminosities are discussed. Chapter 7. and Chapter 8. are dedicated to study an effcient trigger strategy for the $$H + W/Z \to b\bar{b}jj$$ channel and the $$H + Z \to b\bar{b} \nu\bar{\nu}$$ channels, respectively. Trigger primitives at all levels are defined and trigger rates and trigger effciencies are calculated. Chapter 9. is dedicated to the study of the CDF Run-II Higgs boson discovery potential in the $$H + W/Z \to b\bar{b}jj$$ and $$H + Z \to b\bar{b}\nu\bar{\nu}$$ channels with the discussed triggers. The results of the Tevatron Higgs Working Group are discussed taking into account the new trigger. For the $$H + W/Z \to b\bar{b}jj$$ channel an alternative optimization of the offine cuts is performed, and finally the Run-I limits in this channel are extrapolated to the Run-II scenario. 4
- 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:
- 1420965
- Report Number(s):
- FERMILAB-THESIS-2002-01; 588191
- Country of Publication:
- United States
- Language:
- English
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