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A study of mean sub-jet multiplicities in two- and three-jet hadronicZ 0 decays
Author(s) -
R. Akers,
G. Alexander,
J. Allison,
K. J. Anderson,
Silvia Arcelli,
S. Asai,
A. Astbury,
D. Axen,
G. Azuelos,
A. H. Ball,
R. J. Barlow,
S. Barnett,
R. Bartoldus,
J. R. Batley,
G. Beaudoin,
A. Beck,
H. P. Beck,
J. Becker,
C. Beeston,
T. Behnke,
K. W. Bell,
G. Bella,
P. Bentkowski,
P. Berlich,
S. Bethke,
O. Biebel,
I.J. Bloodworth,
P. Bock,
B. Boden,
H. M. Bosch,
M. Boutemeur,
P. Bright-Thomas,
R. M. Brown,
A. Buijs,
H. Burckhart,
C. D. Burgard,
P. Capiluppi,
R.K. Carnegie,
A. A. Carter,
J. R. Carter,
C.Y. Chang,
C. Charlesworth,
D. G. Charlton,
S. L. Chu,
P. E. L. Clarke,
J. C. Clayton,
I. Cohen,
J.E. Conboy,
M. Cooper,
M. Coupland,
M. Cuffiani,
S. Dado,
C. Dallapiccola,
G. M. Dallavalle,
C. Darling,
S. J. de Jong,
L.A. del Pozo,
Huiqiu Deng,
M. Dittmar,
M.S. Dixit,
E. do Couto e Silva,
J. E. Duboscq,
E. Duchovni,
G. Duckeck,
I. P. Duerdoth,
D. Dumas,
P.A. Elcombe,
P.G. Estabrooks,
E. Etzion,
H. Evans,
F. Fabbri,
B. Fabbro,
M. Fierro,
M. Fincke-Keeler,
H.M. Fischer,
R. Folman,
D.G. Fong,
M. Foucher,
H. Fukui,
A. Fürtjes,
A. Gaidot,
J. W. Gary,
J. Gascon,
N. I. Geddes,
C. Geich-Gimbel,
S.W. Gensler,
F. X. Gentit,
T. Geralis,
P. Giacomelli,
R. Giacomelli,
V. Gibson,
W.R. Gibson,
J.D. Gillies,
J. Goldberg,
D. M. Gingrich,
M.J. Goodrick,
W. Gorn,
C. Grandi,
F.C. Grant,
J. Hagemann,
G. G. Hanson,
M. Hansroul,
C. K. Hargrove,
P. F. Harrison,
J.C. Hart,
P. A. Hart,
P.M. Hattersley,
M. Hauschild,
C. M. Hawkes,
E. Heflin,
R.J. Hemingway,
G. Herten,
R.D. Heuer,
J. C. Hill,
S. J. Hillier,
T. Hilse,
D. A. Hinshaw,
P. R. Hobson,
D. Hochman,
R.J. Homer,
A. K. Honma,
R.E. Hughes-Jones,
R. Humbert,
P. Igo-Kemenes,
H. Ihssen,
D.C. Imrie,
A. Jawahery,
P.W. Jeffreys,
H. Jérémie,
M. Jimack,
M. Jones,
R. W. L. Jones,
P. Jovanović,
C. C. H. Jui,
D. Karlen,
K. Kawagoe,
T. Kawamoto,
R. Keeler,
R. G. Kellogg,
B. W. Kennedy,
J. King,
S. Kluth,
T. Kobayashi,
M. Kobel,
D. S. Koetke,
T. Kokott,
S. Komamiya,
R. Kowalewski,
Robert Howard,
J. von Krogh,
J. Kroll,
P. Kyberd,
G. Lafferty,
H. Lafoux,
R. Lahmann,
J. Lauber,
J. G. Layter,
P. Leblanc,
P. Y. C. Du,
A. M. Lee,
E. Lefebvre,
M.H. Lehto,
D. Lellouch,
C. Leroy,
J. Letts,
L. Levinson,
Z. Li,
S. L. Lloyd,
F. K. Loebinger,
G. D. Long,
B. Lorazo,
M. J. Losty,
X. C. Lou,
J. Ludwig,
A. Luig,
M. Mannelli,
S. Marcellini,
C. Markus,
A. J. Martin,
J.P. Martin,
T. Mashimo,
P. Mättig,
U. Maur,
J. A. McKenna,
Thomas J. McMahon,
J.R. McNutt,
F. Meijers,
F. S. Merritt,
H. Mes,
A. Michelini,
R. P. Middleton,
G. Mikenberg,
J. Mildenberger,
D.J. Miller,
R. Mir,
W. Mohr,
C. Moisan,
A. Montanari,
T. Mori,
M. Morii,
U. Müller,
B. Nellen,
H. Nguyen,
S.W. OʼNeale,
F. G. Oakham,
F. Odorici,
H. Ogren,
C. J. Oram,
M. J. Oreglia,
S. Orito,
J.P. Pansart,
P. Paschievici,
G. N. Patrick,
M. J. Pearce,
P. Pfister,
J. E. Pilcher,
J. L. Pinfold,
D. Pitman,
D.E. Plane,
P. Poffenberger,
B. Poli,
T.W. Pritchard,
H. Przysiezniak,
G. Quast,
M.W. Redmond,
D.L. Rees,
G. E. Richards,
M. Rison,
S. Robins,
D. Robinson,
A. Rollnik,
J. M. Roney,
E. Ros,
S. Rossberg,
M. Rosvick,
P. Routenburg,
K. Runge,
Ö. Runólfsson,
D. R. Rust,
M. Sasaki,
C. Sbarra,
A.D. Schaile,
O. Schaile,
F. Scharf,
P. Scharff-Hansen,
P. Schenk,
B. Schmitt,
H. von der Schmitt,
M. Schröder,
H.-C. Schultz-Coulon,
Philipp Schütz,
Michael Schulz,
C. Schwick,
J. Schwiening,
W. G. Scott,
M. Settles,
T. Shears,
B. C. Shen,
C. H. Shepherd-Themistocleous,
P. Sherwood,
G. P. Siroli,
A. Skillman,
A. Skuja,
Andrew Smith,
T. J. Smith,
G. A. Snow,
R. Sobie,
R. W. Springer,
M. Sproston,
A. Stahl,
C. Stegmann,
K. Stephens,
J. Steuerer,
R. Ströhmer,
D. Strom,
H. Takeda,
S. Tarem,
M. Tecchio,
P. Teixeira-Dias,
N. Tesch,
M. Thomson,
E. Torrente-Luján,
S. Towers,
N. J. Tresilian,
T. Tsukamoto,
Mark Turner,
D. Van den plas,
R. Van Kooten,
G. J. Dalen,
G. Vasseur,
M. G. Vincter,
A. Wagner,
D.L. Wagner,
C. Wahl,
C. P. Ward,
D. R. Ward,
J.J. Ward,
P. M. Watkins,
A. T. Watson,
N. K. Watson,
P. Weber,
P. S. Wells,
N. Wermes,
B. Wilkens,
G. Wilson,
J. A. Wilson,
V-H. Winterer,
T. Wlodek,
W. Wiedenmann,
S. Wotton,
T. R. Wyatt,
R. Yaari,
A. Yeaman,
G. Yekutieli,
M. Yurko,
W. Zeuner,
G. T. Zorn
Publication year - 1994
Publication title -
zeitschrift für physik c
Language(s) - English
Resource type - Journals
eISSN - 1431-5858
pISSN - 0170-9739
DOI - 10.1007/bf01580318
Subject(s) - physics , particle physics , jet (fluid) , monte carlo method , gluon , hadron , multiplicity (mathematics) , perturbative qcd , parton shower , quantum chromodynamics , coherence (philosophical gambling strategy) , parton , event (particle physics) , logarithm , nuclear physics , statistics , mathematics , astrophysics , geometry , quantum mechanics , mathematical analysis , thermodynamics
This paper describes an analysis of sub-jet multiplicities, which are expected to be sensitive to the properties of soft gluon radiation, in hadronic decays of theZ0. Two- and three-jet event samples are selected using thek? jet clustering algorithm at a jet resolution scaley1. The mean sub-jet multiplicity as a function of the sub-jet resolution,y0, is determined separately for both event samples by reapplying the same jet algorithm at resolution scalesy0y1. These measurements are compared with recent perturbative QCD calculations based on the summation of leading and next-to-leading logarithms, and with QCD Monte Carlo models. The analytic calculations provide a good description of the sub-jet multiplicity seen in three- and two-jet mvents in the perturbative region (y0˜y1)), and the measured form of the data is in agreement with the expectation based on coherence of soft gluon radiation. The analysis provides good discrimination between Monte Carlo models, and those with a coherent parton shower are preferred by the data. The analysis suggests that coherence effects are present in the data.

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