First Study of the Structure of e+e- ---> b bbar g Events and Limits on the Anomalous Chromomagnetic Couplings of the b-Quark

Technical Report · Thu Mar 04 04:00:00 EST 1999

OSTI ID:6197777

Burrows, Phil

The structure e⁺e^- > b anti-b g events was studied using Z⁰; decays recorded in the SLD experiment at SLAC. Three-jet final states were selected and the CCD-based vertex detector was used to identify two of the jets as b or anti-b. Distributions of the gluon energy and polar angle were measured over the full kinematic range for the first tiem, and compared wth perturbative QCD predictions. The energy distribution is potentially sensitive to an anomalous b chromomagnetic moment [kappa]. We measured [kappa] to be consistent with zero and set the first limits on its value, -0.17 < [kappa] < 0.11 at 95% c.1.

• Research Organization: Stanford Linear Accelerator Center (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: ER
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6197777
• Report Number(s): SLAC-PUB-7920; ON: DE00009916
• Country of Publication: United States
• Language: English

Related Subjects

660000* -- Physics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
B QUARKS
BEAUTY PARTICLES
BOSONS
COUPLING
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
GLUONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
JETS
LEPTON-LEPTON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARKS
Z NEUTRAL BOSONS