Determination of the Strong Coupling Constant and Multijet Cross Section Ratio Measurements

Conference · Wed Jun 01 00:00:00 EDT 2011

OSTI ID:1023977

Wobisch, M

Concepts and results of determinations of the strong coupling in hadron collisions are discussed. A recent {alpha}{sub s} result from the inclusive jet cross section in p{bar p} collisions at {radical}s = 1.96 TeV is presented which is based on perturbative QCD calculations beyond next-to-leading order. Emphasis is put on the consistency of the conceptual approach. Conceptual limitations in the approach of extracting as from cross section data are discussed and how these can be avoided by using observables that are defined as ratios of cross sections. For one such observable, the multijet cross section ratio R{sub 3/2}, preliminary results are presented.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1023977
• Report Number(s): FERMILAB-CONF-11-285-E; arXiv eprint number arXiv:1106.5132; TRN: US1104645
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING CONSTANTS
CROSS SECTIONS
HADRONS
INCLUSIVE INTERACTIONS
JET MODEL
PERTURBATION THEORY
MULTIPLE PRODUCTION
QUANTUM CHROMODYNAMICS
Experiment-HEP