Jet production and fragmentation in e+e- annihilation at 12-43 GeV

M. Althoff; W. Braunschweig; F. J. Kirschfink; K. Lübelsmeyer; H. U. Martyn; G. Peise; J. Rimkus; P. Rosskamp; H. G. Sander; D. Schmitz; H. Siebke; W. Wallraff; H. M. Fischer; H. Hartmann; W. Hillen; A. Joksch; G. Knop; L. Köpke; H. Kolanoski; H. Kück; V. Mertens; R. Wedemeyer; N. Wermes; M. Wollstadt; Y. Eisenberg; K. Gather; H. Hultschig; P. Joos; W. Koch; U. Kötz; H. Kowalski; A. Ladage; B. Löhr; D. Lüke; P. Mattig; D. Notz; R. J. Nowak; J. Pyrlik; D. R. Quarrie; M. Rushton; W. Schütte; D. Trines; G. Wolf; Ch Xiao; R. Fohrmann; E. Hilger; T. Kracht; H. L. Krasemann; P. Leu; E. Lohrmann; D. Pandoulas; G. Poelz; K. U. Pösnecker; B. H. Wiik; R. Beuselinck; D. M. Binnie; A. J. Campbell; P. J. Dornan; B. Foster; D. A. Garbutt; C. Jenkins; T. D. Jones; W. G. Jones; J. McCardle; J. K. Sedgbeer; J. Thomas; W. A.T.Wan Abdullah; K. W. Bell; M. G. Bowler; P. Bull; R. J. Cashmore; P. E.L. Clarke; R. Devenish; P. Grossmann; C. M. Hawkes; S. L. Lloyd; G. L. Salmon; T. R. Wyatt; C. Youngman; G. E. Forden; J. C. Hart; J. Harvey; D. K. Hasell; J. Proudfoot; D. H. Saxon; P. L. Woodworth; F. Barreiro; M. Dittmar; M. Holder; B. Neumann; E. Duchovni; U. Karshon; G. Mikenberg; R. Mir; D. Revel; E. Ronat; A. Shapira; G. Yekutieli; G. Baranko; T. Barklow; A. Caldwell; M. Cherney; J. M. Izen; M. Mermikides; G. Rudolph; D. Strom; H. Venkataramania; E. Wicklund; Sau Lan Wu; G. Zobernig

doi:10.1007/BF01547419

Back

Jet production and fragmentation in e+e- annihilation at 12-43 GeV

Journal article

Peer reviewed

Jet production and fragmentation in e+e- annihilation at 12-43 GeV

M. Althoff, W. Braunschweig, F. J. Kirschfink, K. Lübelsmeyer, H. U. Martyn, G. Peise, J. Rimkus, P. Rosskamp, H. G. Sander, D. Schmitz, …

Zeitschrift für Physik C Particles and Fields, Vol.22(4), pp.307-340

12/1984

DOI: https://doi.org/10.1007/BF01547419

Abstract

Physics and Astronomy (miscellaneous)

We present the general properties of jets produced by e+e- annihilation. Their production and fragmentation characteristics have been studied with charged particles for c.m. energies between 12 and 43 GeV. In this energy range e+e- annihilation into hadrons is dominated by pair production of the five quarks u, d, s, c and b. In addition, hard gluon bremsstrahlung effects which are invisible at low energies become prominent at the high energies. The observed multiplicity distributions deviate from a Poisson distribution. The multiplicity distributions for the overall event as well as for each event hemisphere satisfy KNO scaling to within ∼20%. The distributions of xp=2 p/W are presented; scale breaking is observed at the level of 25%. The quantity xpdδ/dxp is compared with multigluon emission calculations which predict a Gaussian distribution in terms of ln(1/x). The observed energy dependence of the maximum of the distributions is in qualitative agreement with the calculations. Particle production is analysed with respect to the jet axis and longitudinal and transverse momentum spectra are presented. The angular distribution of the jet axis strongly supports the idea of predominant spin 1/2 quark pair production. The particle distributions with respect to the event plane show clearly the growing importance of planar events with increasing c.m. energies. They also exclude the presence of heavy quark production, e+e-→Q {Mathematical expression} for quark masses up to 5QQ|=2/3) and 7QQ|=1/3). The comparison of 1/σtotdδ/dpT measured at 14, 22 and 34 GeV suggests that hard gluon bremsstrahlung contributes mainly to transverse momenta larger than 0.5 GeV/c. The rapidity distribution for W≧22 GeV shows an enhancement away from y=0 which corresponds to an increase in yield of 10-15% compared to the centre region (y=0). The enhancement probably results from heavy quark production and gluon bremsstrahlung. The particle flux around the jet axis shows with increasing c.m. energy a rapidly growing number of particles collimated around the jet axis, while at large angles to the jet axis almost no W dependence is observed. For fixed longitudinal momentum p{norm of matrix} approximate "fan invariance" is seen: The shape of the angular distribution around the jet axis is almost independent of W. The collimation depends strongly on p{norm of matrix}. For small p{norm of matrix}, p{norm of matrix}{norm of matrix} the particles tend to be emitted closer and closer to the jet axis.

Metrics

6 Record Views

Details

Title: Jet production and fragmentation in e+e- annihilation at 12-43 GeV
Creators: M. Althoff (Author) - RWTH Aachen University
W. Braunschweig (Author) - RWTH Aachen University
F. J. Kirschfink (Author) - RWTH Aachen University
K. Lübelsmeyer (Author) - RWTH Aachen University
H. U. Martyn (Author) - RWTH Aachen University
G. Peise (Author) - RWTH Aachen University
J. Rimkus (Author) - RWTH Aachen University
P. Rosskamp (Author) - RWTH Aachen University
H. G. Sander (Author) - RWTH Aachen University
D. Schmitz (Author) - RWTH Aachen University
H. Siebke (Author) - RWTH Aachen University
W. Wallraff (Author) - RWTH Aachen University
H. M. Fischer (Author) - University of Bonn
H. Hartmann (Author) - University of Bonn
W. Hillen (Author) - University of Bonn
A. Joksch (Author) - University of Bonn
G. Knop (Author) - University of Bonn
L. Köpke (Author) - University of Bonn
H. Kolanoski (Author) - University of Bonn
H. Kück (Author) - University of Bonn
V. Mertens (Author) - University of Bonn
R. Wedemeyer (Author) - University of Bonn
N. Wermes (Author) - University of Bonn
M. Wollstadt (Author) - University of Bonn
Y. Eisenberg (Author) - German Electron Synchrotron
K. Gather (Author) - German Electron Synchrotron
H. Hultschig (Author) - German Electron Synchrotron
P. Joos (Author) - German Electron Synchrotron
W. Koch (Author) - German Electron Synchrotron
U. Kötz (Author) - German Electron Synchrotron
H. Kowalski (Author) - German Electron Synchrotron
A. Ladage (Author) - German Electron Synchrotron
B. Löhr (Author) - German Electron Synchrotron
D. Lüke (Author) - German Electron Synchrotron
P. Mattig (Author) - German Electron Synchrotron
D. Notz (Author) - German Electron Synchrotron
R. J. Nowak (Author) - German Electron Synchrotron
J. Pyrlik (Author) - German Electron Synchrotron
D. R. Quarrie (Author) - German Electron Synchrotron
M. Rushton (Author) - German Electron Synchrotron
W. Schütte (Author) - German Electron Synchrotron
D. Trines (Author) - German Electron Synchrotron
G. Wolf (Author) - German Electron Synchrotron
Ch Xiao (Author) - German Electron Synchrotron
R. Fohrmann (Author) - University of Hamburg
E. Hilger (Author) - University of Hamburg
T. Kracht (Author) - University of Hamburg
H. L. Krasemann (Author) - University of Hamburg
P. Leu (Author) - University of Hamburg
E. Lohrmann (Author) - University of Hamburg
D. Pandoulas (Author) - University of Hamburg
G. Poelz (Author) - University of Hamburg
K. U. Pösnecker (Author) - University of Hamburg
B. H. Wiik (Author) - University of Hamburg
R. Beuselinck (Author) - Imperial College London
D. M. Binnie (Author) - Imperial College London
A. J. Campbell (Author) - Imperial College London
P. J. Dornan (Author) - Imperial College London
B. Foster (Author) - Imperial College London
D. A. Garbutt (Author) - Imperial College London
C. Jenkins (Author) - Imperial College London
T. D. Jones (Author) - Imperial College London
W. G. Jones (Author) - Imperial College London
J. McCardle (Author) - Imperial College London
J. K. Sedgbeer (Author) - Imperial College London
J. Thomas (Author) - Imperial College London
W. A.T.Wan Abdullah (Author) - Imperial College London
K. W. Bell (Author) - University of Oxford
M. G. Bowler (Author) - University of Oxford
P. Bull (Author) - University of Oxford
R. J. Cashmore (Author) - University of Oxford
P. E.L. Clarke (Author) - University of Oxford
R. Devenish (Author) - University of Oxford
P. Grossmann (Author) - University of Oxford
C. M. Hawkes (Author) - University of Oxford
S. L. Lloyd (Author) - University of Oxford
G. L. Salmon (Author) - University of Oxford
T. R. Wyatt (Author) - University of Oxford
C. Youngman (Author) - University of Oxford
G. E. Forden (Author) - Rutherford Appleton Laboratory
J. C. Hart (Author) - Rutherford Appleton Laboratory
J. Harvey (Author) - Rutherford Appleton Laboratory
D. K. Hasell (Author) - Rutherford Appleton Laboratory
J. Proudfoot (Author) - Rutherford Appleton Laboratory
D. H. Saxon (Author) - Rutherford Appleton Laboratory
P. L. Woodworth (Author) - Rutherford Appleton Laboratory
F. Barreiro (Author) - University of Siegen
M. Dittmar (Author) - University of Siegen
M. Holder (Author) - University of Siegen
B. Neumann (Author) - University of Siegen
E. Duchovni (Author) - Weizmann Institute of Science
U. Karshon (Author) - Weizmann Institute of Science
G. Mikenberg (Author) - Weizmann Institute of Science
R. Mir (Author) - Weizmann Institute of Science
D. Revel (Author) - Weizmann Institute of Science
E. Ronat (Author) - Weizmann Institute of Science
A. Shapira (Author) - Weizmann Institute of Science
G. Yekutieli (Author) - Weizmann Institute of Science
G. Baranko (Author) - University of Wisconsin-Madison
T. Barklow (Author) - University of Wisconsin-Madison
A. Caldwell (Author) - University of Wisconsin-Madison
M. Cherney (Author) - University of Wisconsin-Madison
J. M. Izen (Author) - University of Wisconsin-Madison
M. Mermikides (Author) - University of Wisconsin-Madison
G. Rudolph (Author) - University of Wisconsin-Madison
D. Strom (Author) - University of Wisconsin-Madison
H. Venkataramania (Author) - University of Wisconsin-Madison
E. Wicklund (Author) - University of Wisconsin-Madison
Sau Lan Wu (Author) - University of Wisconsin-Madison
G. Zobernig (Author) - University of Wisconsin-Madison
Additional links: Clark, Terry D.; Potter, Joshua D.; Larson, Jennifer M.; Mordeson, John N.; Wierman, Mark J.; Caulfield, J.H.; Chen, S.H.; Cheng, H.D.; Duro, R.; Caufield, J.H.; Chen, S.H.; Cheng, H.D.; Duro, R.; Honavar, V.
Publication Details: Zeitschrift für Physik C Particles and Fields, Vol.22(4), pp.307-340
Series: 22
Number of pages: 34
Identifiers: 991005929971102656
Academic Unit: Creighton University
Language: English
Resource Type: Journal article

Jet production and fragmentation in e+e- annihilation at 12-43 GeV

Abstract

Related links

Metrics

Details