The Cross-Section for the Production of $$b \bar{b}$$ Pairs in the $$p\bar{p}$$ Collisions at $$\sqrt{s}$$ = 1.8-TeV

Thesis/Dissertation · Tue Mar 01 04:00:00 EST 1994

DOI:https://doi.org/10.2172/1372839· OSTI ID:1372839

Mattingly, Robert B. ^[1]

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1. Brandeis Univ., Waltham, MA (United States)

The cross section for the inclusive production of $$b\bar{b}$$ pairs in proton-antiproton collisions at a center-of-mass energy of 1.8 TeV, as measured by the Collider Detector at Fermilab (CDF) during the 1988-1989 experimental run, is presented. The production of bottom quark pairs is identified through the dual semileptonic decay mode, in which one quark produces an electron, and the other a muon. Background from cascade decays of single $$b$$ quarks is removed by requiring the invariant mass of the $$e\mu$$. pair be greater than the mass of the $$b$$. The $$b\bar{b}$$ signal is separated statistically from the remaining physics background, $$c\bar{c}$$ production, by fitting the lepton $$P^{rel}_\tau$$ distributions with normalized distributions obtained from Monte Carlo simulations of $$b$$ and $$c$$ decays. The resulting cross section, expressed in terms of the $$b$$ $$P_{\tau}$$ thresholds, is found to be a factor of two higher than the prediction of Quantum Chromodynamics.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1372839
• Report Number(s): FERMILAB-THESIS--1994-33; UMI--94-31203; 384392
• Country of Publication: United States
• Language: English

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