The Beauty and Charm Production Cross-Sections in 250-GeV/C $$\pi^+$$ - Nucleon Interactions

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/1425806· OSTI ID:1425806

Darling, Christopher Lynn ^[1]

---

1. Yale U.

By determining the production cross sections for heavy flavor hadrons, we test the theoretical predictions from perturhative quantum chroma-dynamics (QCD). In the case of pion induced beauty production, the few published results do not resolve the issue of the applicability of perturbative QCD. This analysis is undertaken in order to help resolve this situation. We determine the total beauty and charm production cross sections using an analysis of single electron decay products. We extract the cross sections per nucleon from the two-dimensional distribution of electron $$p^2_{\tau}$$ versus impact parameter (d) to the primary vertex. We place an upper limit on the beauty production cross section of $$\sigma_{b\overline{b}}$$ < 105 nb at the 90% confidence level, where the limit includes both statistical and systematic errors. The charm production cross section is determined to be $$\sigma_{c\overline{c}} = 13.9 ^{+2.4}_{-2.3}$$(stat)±l.8(syst) $$\mu b$$, which is in good agreement with next-to-leading order QCD predictions and other measurements.

• 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: 1425806
• Report Number(s): FERMILAB-THESIS-1993-03; UMI-93-29343; 363662
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS