Study of orientation of three jet events in Z0 hadronic decays using the DELPHI detector

The study of the orientation of three-jet events from e + e − → Z 0 → multi-hadrons is presented, in particular the polar angle distributions of the thrust axis and of the normal to the three-jet plane, and the azimuthal correlations between the hadron plane and the one defined by the beam and thrust axes. The data are compared with results at lower energy and with QCD predictions. Good agreement with QCD predictions is observed. The scalar gluon theory is excluded by the data.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
Z0: electroproduction
electroproduction: Z0
Z0: nonleptonic decay
nonleptonic decay: Z0
final state: (3jet)
(3jet): final state

References(16)

Figures(0)

Evidence for Jet Structure in Hadron Production by e+ e- Annihilation

G. Hanson
(
- LBL, Berkeley and
- SLAC
)
,
G.S. Abrams
(
- LBL, Berkeley and
- SLAC
)
,
A. Boyarski
(
- LBL, Berkeley and
- SLAC
)
,
Martin Breidenbach
(
- LBL, Berkeley and
- SLAC
)
,
F. Bulos
(
- LBL, Berkeley and
- SLAC
)

et al.

- Phys.Rev.Lett. 35 (1975) 1609-1612,
- In *Cahn, R.N., Goldhaber, G.: The experimental foundations of particle physics* 318-321,
- In *Stanford 1975, Proceedings, Summer Institute on Particle Physics*, Stanford 1975, 237-246
•
DOI:
- 10.1103/PhysRevLett.35.1609

{QCD} Predictions for Jets in $e^+ e^-$ Annihilation: Angular Correlations and Asymmetries

- Phys.Lett.B 79 (1978) 249,
- Phys.Lett.B 80 (1979) 433 (erratum)
•
DOI:
- 10.1016/0370-2693(79)91213-9

Cross-sections and Angular Distributions of Three Jet Final States in $e^+ e^-$ Annihilation for Heavy Quarks

- Z.Phys.C 4 (1980) 149
•
DOI:
- 10.1007/BF01554399

Three Jet Distributions in $e^+ e^-$ Annihilation: Electromagnetic and Weak Production

E. Laermann
(
- Aachen, Tech. Hochsch.
)
,
K.H. Streng
(
- Aachen, Tech. Hochsch.
)
,
P.M. Zerwas
(
- Aachen, Tech. Hochsch.
)

- Z.Phys.C 3 (1980) 289,
- Z.Phys.C 52 (1991) 352 (erratum),
- Z.Phys.C3 (1980) 289-298 and Aachen Tech Hochschule - PITHA-79-14 (79,REC.MAY) 42p
•
DOI:
- 10.1007/BF01414180

Angular Asymmetries of $e^+ e^-$ Annihilation to Three Jets

K. Koller
(
- Munich U.
)
,
H.G. Sander
(
- Aachen, Tech. Hochsch.
)
,
T.F. Walsh
(
- DESY
)
,
P.M. Zerwas
(
- Aachen, Tech. Hochsch. and
- DESY
)

- Z.Phys.C 6 (1980) 131
•
DOI:
- 10.1007/BF01588839

Very Small and Resolution Insensitive O ( $\alpha^- s^2$ ) Corrections to a Polar Asymmetry Measure of Oriented Three Jet Events in $e^+ e^-$ Annihilation

Jurgen G. Korner
(
- Mainz U., Inst. Phys.
)
,
Gerhard A. Schuler
(
- DESY
)
,
F. Barreiro
(
- Madrid, Autonoma U.
)

- Phys.Lett.B 188 (1987) 272-278
•
DOI:
- 10.1016/0370-2693(87)90020-7

Experimental Study of the Orientation of Three Jet Events in $e^+ e^-$ Annihilation at {PETRA}

TASSO

Collaboration

•

W. Braunschweig
(
- Aachen, Tech. Hochsch.
)

et al.

- Z.Phys.C 47 (1990) 181-186
•
DOI:
- 10.1007/BF01552338

The DELPHI detector at LEP

DELPHI

Collaboration

•

P.A. Aarnio

et al.

- Nucl.Instrum.Meth.A 303 (1991) 233-276
•
DOI:
- 10.1016/0168-9002(91)90793-P

Study of Hadronic Decays of the $\Z^0$ Boson

DELPHI

Collaboration

•

P. Aarnio
(
- Helsinki U.
)

et al.

- Phys.Lett.B 240 (1990) 271-282
•
DOI:
- 10.1016/0370-2693(90)90445-C

Electromagnetic Radiative Corrections at LEP - SLC Energies for Experimentalists

Jean-Eric Campagne
(
- Paris U., VI-VII
)
,
R. Zitoun
(
- Paris U., VI-VII
)

- Z.Phys.C 43 (1989) 469
•
DOI:
- 10.1007/BF01506543

Coherent Parton Showers Versus Matrix Elements: Implications of PETRA - PEP Data

- Phys.Lett.B 185 (1987) 435
•
DOI:
- 10.1016/0370-2693(87)91031-8

The Lund Monte Carlo for Jet Fragmentation

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)

- Comput.Phys.Commun. 27 (1982) 243,
- Comput. Phys. Commun. 27 ( 1982) 243-284 and Lund Univ. - LU TP 82-03 (82,REC.MAY) 74p
•
DOI:
- 10.1016/0010-4655(82)90175-8

The Lund Monte Carlo for e+ e- Jet Physics

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)

- Comput.Phys.Commun. 28 (1983) 229,
- Comput. Phys. Commun. 28 ( 1983) 229-254 and Lund Univ. - LU TP 82-07 (82,REC.JUL.) 42p
•
DOI:
- 10.1016/0010-4655(83)90041-3

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics. Jetset Version 6.3: An Update

- Comput.Phys.Commun. 43 (1987) 367
•
DOI:
- 10.1016/0010-4655(87)90054-3

A Test of QCD based on three jet events from Z0 decays

L3

Collaboration

•

B. Adeva
(
- CERN
)

et al.

- Phys.Lett.B 263 (1991) 551-562
•
DOI:
- 10.1016/0370-2693(91)90504-J

Measurement of three jet distributions sensitive to the gluon spin in e+ e- annihilations at S**(1/2) = 91-GeV

OPAL

Collaboration

•

G. Alexander

et al.

- Z.Phys.C 52 (1991) 543-550