Study of the structure of e{sup +}e{sup {minus}}{r_arrow}b{bar b}g events and first limits on the anomalous chromomagnetic coupling of the {ital b} quark

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Physical Review, D

OSTI ID:698905

Steiner, R ^[1]; Yuta, H ^[2]; Benvenuti, A C ^[3]; de Groot, N ^[4]; Allen, N J; Cotton, R; Dervan, P J; Hasan, A; McKemey, A K; Watts, S J ^[5]; Coller, J A; Hedges, S J; Shank, J T; Whitaker, J S ^[6]; DOliveira, A; Johnson, R A; Meadows, B T; Nussbaum, M ^[7]; Danielson, M N; Fahey, S ; Fan, C; Goodman, E R; Krishna, N M; Nauenberg, U; Wagner, D L; Williams, B ^[8]; Rowson, P C; Shaevitz, M H ^[9]; Dima, M; Harton, J L; Smy, M B; Staengle, H; Wilson, R J ^[10]; Camanzi, B; Mazzucato, E; Menegatti, G; Piemontese, L ^[11]; Calcattera, A; de Sangro, R; Falciai, D; Peruzzi, I; Piccolo, M ^[12]; Eisenstein, B I; Gladding, G; Karliner, I ^[13]; Swartz, M ^[14]; Shapiro, G; Steiner, H ^[15]; Barakat, M B ^[16]; Baird, K G; Blaylock, G; Flood, K; Hertzbach, S S; Kofler, R R; Lin, C; Strauss, M G; Willocq, S; Wittlin, J L ^[17]; Bauer, J M; Eschenburg, V; Kroeger, R S; others, and

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1. Adelphi University, Garden City, New York 11530 (United States)
2. Aomori University, Aomori, 030 (Japan)
3. INFN Sezione di Bologna, I-40126 Bologna (Italy)
4. University of Bristol, Bristol (United Kingdom)
5. Brunel University, Uxbridge, Middlesex UB8 3PH (United Kingdom)
6. Boston University, Boston, Massachusetts 02215 (United States)
7. University of Cincinnati, Cincinnati, Ohio 45221 (United States)
8. University of Colorado, Boulder, Colorado 80309 (United States)
9. Columbia University, New York, New York 10533 (United States)
10. Colorado State University, Ft. Collins, Colorado 80523 (United States)
11. INFN Sezione di Ferrara and Universita di Ferrara, I-44100 Ferrara (Italy)
12. INFN Laboratory Nazionali di Frascati, I-00044 Frascati (Italy)
13. University of Illinois, Urbana, Illinois 61801 (United States)
14. Johns Hopkins University, Baltimore, Maryland 21218-2686 (United States)
15. Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States)
16. Louisiana Technical University, Ruston, Louisiana 71272 (United States)
17. University of Massachusetts, Amherst, Massachusetts 01003 (United States)

The structure of e{sup +}e{sup {minus}}{r_arrow}b{bar b}g events was studied using Z{sup 0} decays recorded in the SLC Large Detector experiment at SLAC. Three-jet final states were selected and the charge-coupled device-based vertex detector was used to identify two of the jets as {ital b} or {bar b}. Distributions of the gluon energy and polar angle were measured over the full kinematic range for the first time, and compared with perturbative QCD predictions. The energy distribution is potentially sensitive to an anomalous {ital b} chromomagnetic moment {kappa}. We measured {kappa} to be consistent with zero and set the first limits on its value: {minus}0.17{lt}{kappa}{lt}0.11 at 95{percent} C.L. {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 698905
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 9 Vol. 60; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
B QUARKS
ELECTRON-POSITRON INTERACTIONS
GLUONS
JET MODEL
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
STANFORD LINEAR COLLIDER
Z NEUTRAL BOSONS