Open AccessTransverse momentum correlations in hadronic Z decays
Author(s) -
D. Buskulic,
I Debonis,
J. A. de Vries,
Ph. Ghez,
C. Goy,
J.-P. Lees,
A. Lucotte,
M.-N. Minard,
J.Y. Nief,
P. Odier,
B. Pietrzyk,
MP Casado,
M. Chmeissani,
J.M. Crespo,
M. Delfino,
I. Efthymiopoulos,
E. Fernández,
M. Bosman,
L. Garrido,
A. Juste Rozas,
M. Martı́nez,
S. Orteu,
C. Padilla Aranda,
Ic Park,
Á. Pascual,
Ja Perlas,
I. Riu,
F. Sánchez,
F Teubert,
A. Colaleo,
D. Creanza,
M. DePalma,
G. Gelao,
M. Girone,
G. Iaselli,
G. Maggi,
M. Maggi,
N. Marinelli,
S. Nuzzo,
A. Ranieri,
G. Raso,
F. Ruggieri,
G. Selvaggi,
L. Silvestris,
P. Tempesta,
A. Tricomi,
G. Zito,
Xu-Dong Huang,
Jenshan Lin,
Q. Ouyang,
T Wang,
Y. Xie,
R. Xu,
S. Xue,
J. Zhang,
L. Zhang,
W. Zhao,
R. Alemany,
A.O. Bazarko,
G. Bonvicini,
P. Bright-Thomas,
M. Cattaneo,
P. Comas,
P. Coyle,
H. Drevermann,
R.W. Forty,
M. Frank,
R. Hagelberg,
Jeremy N. Harvey,
P. Janot,
B. Jost,
E. Kneringer,
J. Knobloch,
I. Lehraus,
G Lutters,
E.B. Martin,
P. Mato,
A Minten,
R. Miquel,
Lm Mir,
L. Moneta,
T. Oest,
A. Pacheco,
Jf Pusztaszeri,
F. Ranjard,
P. Rensing,
G. Rizzo,
G. Rolandi,
D. Schlatter,
M. Schmelling,
M. Schmitt,
O. Schneider,
W. Tejessy,
IR Tomalin,
A. Venturi,
H. Wachsmuth,
A. Wagner,
Z. Ajaltouni,
A. Barrès,
C. Boyer,
A. Falvard,
C. Guicheney,
P. Henrard,
J. Jousset,
B. Michel,
S. Monteil,
J-C. Montret,
D. Pallin,
P. Perret,
F. Podlyski,
J Proriol,
P. Rosnet,
J.-M. Rossignol,
T. Fearnley,
J. R. Hansen,
J. B. Hansen,
Hansen,
Ph Hansen,
Bs Nilsson,
B. Rensch,
A. Wäänänen,
A. Kyriakis,
C. Markou,
E. Simopoulou,
I. Siotis,
A Vayaki,
K. Zachariadou,
A. Blondel,
G. R. Bonneaud,
J.-C. Brient,
P. Bourdon,
A. Rougé,
M Rumpf,
A. Valassi,
M. Verderi,
H. Videau,
D.J. Candlin,
Mi Parsons,
E. Focardi,
G. Parrini,
M Corden,
C. Georgiopoulos,
D. E. Jaffe,
A. Antonelli,
G. Bencivenni,
G. Bologna,
F. Bossi,
P. Campana,
G. Capon,
D Casper,
V. Chiarella,
G. Felici,
P. Laurelli,
G. Mannocchi,
F. Murtas,
Gp Murtas,
L. Passalacqua,
M. Pepe-Altarelli,
L. Curtis,
S.J. Dorris,
A.W. Halley,
I.G. Knowles,
J.G. Lynch,
O’Shea,
C Raine,
P. Reeves,
J. M. Scarr,
K Smith,
P. Teixeira-Dias,
As Thompson,
F. Thomson,
S. Thorn,
R.M. Turnbull,
U. Becker,
C. Geweniger,
G. Graefe,
P. Hanke,
G. Hansper,
Hepp,
E.E. Kluge,
A. Putzer,
M Schmidt,
J. Sommer,
H Stenzel,
K. Tittel,
S. Werner,
M. Wunsch,
D. Abbaneo,
R. Beuselinck,
D.M. Binnie,
W. Cameron,
P.J. Dornan,
A Moutoussi,
J. Nash,
Jk Sedgbeer,
A.M. Stacey,
Williams,
G. Dissertori,
P. Girtler,
D. Kühn,
G. Rudolph,
A.P. Betteridge,
C.K. Bowdery,
P. Colrain,
G. Crawford,
A.J. Finch,
F. Foster,
G. Hughes,
T. Sloan,
Mi Williams,
A. Galla,
I. Giehl,
A. M. Greene,
Christina Hoffmann,
K Jakobs,
K. Kleinknecht,
G. Quast,
B. Renk,
E. Rohne,
HG Sander,
P. VanGemmeren,
C. Zeitnitz,
J-J. Aubert,
Am Bencheikh,
C. Benchouk,
A. Bonissent,
G Bujosa,
D. Calvet,
J. Carr,
C. Diaconu,
F. Etienne,
N. Konstantinidis,
P. Payre,
D. Rousseau,
M. Talby,
A. Sadouki,
M. Thulasidas,
K. Trabelsi,
M. Aleppo,
F. Ragusa,
C. Bauer,
R. Berlich,
W. Blum,
Büscher,
H. Dietl,
F Dydak,
G. Ganis,
C. Gotzhein,
H. Kroha,
G. Lütjens,
G. Lutz,
W. Männer,
H. G. Moser,
R. Richter,
A. Rosado-Schlosser,
S. Schael,
R Settles,
H. Seywerd,
R Stdenis,
W. Wiedenmann,
G. Wolf,
J. Boucrot,
O. Callot,
Y. Choi,
A. Cordier,
M. Davier,
L. Duflot,
J.-F. Grivaz,
Ph. Heusse,
A. Höcker,
A. Jachołkowska,
M. Jacquet,
DW Kim,
F. LeDiberder,
J. Lefrançois,
A.-M. Lutz,
I Nikolic,
Hyun Jung Park,
Mh Schune,
S. Simion,
J.-J. Veillet,
I Videau,
D. Zerwas,
P. Azzurri,
G. Bagliesi,
G. Batignani,
S. Bettarini,
C. Bozzi,
G Calderini,
M. Carpinelli,
M. A. Ciocci,
V. Ciulli,
R Dellorso,
R Fantechi,
I. Ferrante,
L. Foà,
F. Forti,
A. Giassi,
M. A. Giorgi,
A. Gregorio,
F. Ligabue,
A. Lusiani,
Ps Marrocchesi,
A. Messineo,
F. Palla,
G. Sanguinetti,
A. Sciabà,
P. Spagnolo,
J. Steinberger,
R. Tenchini,
G. Tonelli,
C. Vannini,
PG Verdini,
J. Walsh,
G.A. Blair,
L.M. Bryant,
F Cerutti,
J.T. Chambers,
Y. S. Gao,
Mg Green,
T. Medcalf,
P. Perrodo,
J.A. Strong,
J H. Vonwimmersperg-Toeller,
Botterill,
R.W. Clifft,
T.R. Edgecock,
S. Haywood,
P. Maley,
P.R. Norton,
J.C. Thompson,
A.E. Wright,
B. Bloch-Devaux,
P. Colas,
S. Emery,
W. Kozanecki,
E. Lançon,
Mc Lemaire,
E. Locci,
B. Marx,
P. Perez,
J. Rander,
J.-F. Renardy,
A. Roussarie,
J.-P. Schuller,
J. Schwindling,
A. Trabelsi,
B. Vallage,
S.N. Black,
J.H. Dann,
Rp Johnson,
Hy Kim,
A. M. Litke,
Ma Mcneil,
G. Taylor,
C.N. Booth,
R. Boswell,
Caj Brew,
S. Cartwright,
F. Combley,
A. Koksal,
M. Letho,
Wm Newton,
J. Reeve,
Lf Thompson,
A. Böhrer,
S. Brandt,
G. Cowan,
C. Grupen,
J Minguetrodriguez,
F. Rivera,
Pedro Saraiva,
L. Smolík,
F Stephan,
M Apollonio,
L. Bosisio,
R Dellamarina,
G. Giannini,
B. Gobbo,
G. Musolino,
J. Rothberg,
S. Wasserbaech,
Armstrong,
P. Elmer,
Zhenxing Feng,
D.P.S. Ferguson,
S. González,
J. Grahl,
T.C. Greening,
O. J. Hayes,
H. B. Hu,
P.A. McNamara,
J.M. Nachtman,
W. Orejudos,
Yb Pan,
Y. Saadi,
I. Scott,
A. M. Walsh,
S. L. Wu,
X. Wu,
Jm Yamartino,
M. Zheng,
G. Zobernig
Publication year - 1997
Publication title -
zeitschrift für physik c
Language(s) - English
Resource type - Journals
eISSN - 1431-5858
pISSN - 0170-9739
DOI - 10.1007/s002880050331
Subject(s) - hadron , physics , nuclear physics , particle physics , momentum (technical analysis) , economics , finance
Using data obtained with the ALEPH detector at the Z resonance, a measure based on transverse momentum is shown to exhibit a correlation between the two halves of a hadronic event which cannot be explained by energy-momentum conservation, flavour conservation, the imposition of an event axis or imperfect event reconstruction. Two possible interpretations based on existing Monte Carlo models are examined: a) ARIADNE, with the correlation forming early in the parton shower and with the transition from partons to hadrons playing only a minor part; b) JETSET, with the correlation forming at the fragmentation stage. A correlation technique based on a jet cluster analysis is used to make a comparison of the models with the data. It is concluded that both non-perturbative and perturbative effects make important contributions to the observed correlation.
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