A Test of the Flavor Independence of Strong Interactions in e+e- Annihilation at the Z0 Pole

Technical Report · Fri Sep 03 00:00:00 EDT 1999

DOI:https://doi.org/10.2172/12489· OSTI ID:12489

Muller, David

This thesis presents a comparison of the strong coupling of the gluons to light (q_l = u + d + s), c, and b quarks, determined from multijet rates in flavor-tagged samples of approximately 150,000 hadronic Z⁰ decays recorded with the SLC Large Detector at the SLAC Linear Collider between 1993 and 1995. Flavor separation among primary q_l {anti q_l} , c{anti c} and b {anti b} final states was made on the basis of the reconstructed mass of long-lived heavy-hadron decay vertices, yielding tags with high purity and low bias against {>=} 3-jet final states. The data obtained imply no flavor dependence within our sensitivity.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: ER
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 12489
• Report Number(s): SLAC-R-545; ON: DE00012489
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
Electron-Positron Interactions
Annihilation
Flavor Model
Coupling
Z Neutral Bosons
Particle Decay
Quarks
Gluons