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Transverse and longitudinal Bose-Einstein correlations in hadronic Z $^0$ decays
Author(s) -
G. Abbiendi,
K. Ackerstaff,
P.F. Åkesson,
G. Alexander,
J. Allison,
K. J. Anderson,
Silvia Arcelli,
S. Asai,
S.F. Ashby,
D. Axen,
G. Azuelos,
I. Bailey,
A. H. Ball,
E. L. Barberio,
R. J. Barlow,
J. R. Batley,
S. Baumann,
T. Behnke,
K. W. Bell,
G. Bella,
A. Bellerive,
S. Bentvelsen,
S. Bethke,
O. Biebel,
A. Biguzzi,
I. J. Bloodworth,
P. Bock,
J. Böhme,
O. Boeriu,
D. Bonacorsi,
M. Boutemeur,
S. Braibant,
P. Bright-Thomas,
L. Brigliadori,
R. M. Brown,
H. Burckhart,
J. Cammin,
P. Capiluppi,
R.K. Carnegie,
A. A. Carter,
J. R. Carter,
C. Y. Chang,
D. G. Charlton,
D. Chrisman,
C. Ciocca,
P. E.L. Clarke,
E. Clay,
I. Cohen,
O. C. Cooke,
J. Couchman,
C. Couyoumtzelis,
R. L. Coxe,
M. Cuffiani,
S. Dado,
G. M. Dallavalle,
S. Dallison,
R. Davis,
A. De Roeck,
P. Dervan,
K. Desch,
B. Dienes,
M. S. Dixit,
M. Donkers,
J. Dubbert,
E. Duchovni,
G. Duckeck,
I. P. Duerdoth,
P.G. Estabrooks,
E. Etzion,
F. Fabbri,
A. Fanfani,
M. Fanti,
A. A. Faust,
L. Feld,
P. Ferrari,
F. Fiedler,
M. Fierro,
I. Fleck,
A. Frey,
A. Fürtjes,
D. I. Futyan,
P. Gag,
J. W. Gary,
G. Gaycken,
C. Geich-Gimbel,
P. Giacomelli,
D. M. Gingrich,
D. Glenzinski,
Joel O. Goldberg,
W. Gorn,
C. Grandi,
K. Graham,
E. Ros,
J. Grunhaus,
M. Gruwé,
P. O. Günther,
M. Hansroul,
M. Hapke,
K. Harder,
A. Harel,
C. K. Hargrove,
M. Harin-Dirac,
A. Hauke,
M. Hauschild,
C. M. Hawkes,
R. Hawkings,
R.J. Hemingway,
C. Hensel,
G. Herten,
R. D. Heuer,
M. D. Hildreth,
J. C. Hill,
P. R. Hobson,
A. Hocker,
K. Hoffman,
R.J. Homer,
A. Honma,
Dezső Horváth,
K. R. Hossain,
Robert Howard,
P. Hüntemeyer,
P. Igo-Kemenes,
D. C. Imrie,
K. Ishii,
F.R. Jacob,
A. Jawahery,
H. Jeremie,
M. Jimack,
C. R. Jones,
P. Jovanović,
T. R. Junk,
N. Kanaya,
J. Kanzaki,
G. Karapetian,
D. Karlen,
V. Kartvelishvili,
K. Kawagoe,
T. Kawamoto,
P. I. Kayal,
R. Keeler,
R. G. Kellogg,
B. W. Kennedy,
D. H. Kim,
K. Klein,
A. Klier,
T. Kobayashi,
M. Kobel,
T. P. Kokott,
M. Kolrep,
S. Komamiya,
R. Kowalewski,
T. Kress,
P. Krieger,
J. von Krogh,
T. Kuhl,
M. Kupper,
P. Kyberd,
G. Lafferty,
H. Landsman,
D. Lanske,
I. Lawson,
J. G. Layter,
A. Leins,
D. Lellouch,
J. Letts,
L. J. Levinson,
R. Liebisch,
J. Lillich,
B. List,
C. Littlewood,
A.W. Lloyd,
S. L. Lloyd,
F. K. Loebinger,
G. D. Long,
M. J. Losty,
J. Lu,
J. Ludwig,
A. Macchiolo,
A. Macpherson,
W. F. Mader,
M. Mannelli,
S. Marcellini,
T. E. Marchant,
A. J. Martin,
J.P. Martin,
G. Martı́nez,
T. Mashimo,
P. Mättig,
W. J. McDonald,
J. A. McKenna,
Thomas J. McMahon,
R. A. McPherson,
F. Meijers,
P. Mendez-Lorenzo,
F. S. Merritt,
H. Mes,
Irmtraud M. Meyer,
A. Michelini,
S. Mihara,
G. Mikenberg,
D.J. Miller,
W. Mohr,
A. Montanari,
T. Mori,
K. Nagai,
I. Nakamura,
H. A. Neal,
R. Nisius,
S.W. OʼNeale,
F. G. Oakham,
F. Odorici,
H. Ogren,
A. Okpara,
M. J. Oreglia,
S. Orito,
G. Pásżtor,
J. R. Pater,
G. N. Patrick,
J. Patt,
R. Perez-Ochoa,
P. Pfeifenschneider,
J. E. Pilcher,
J. L. Pinfold,
D. E. Plane,
B. Poli,
J. Polok,
M. Przybycień,
A. Quadt,
C. Rembser,
H. Rick,
S. Robins,
N. Rodning,
J. M. Roney,
S. Rosati,
K. Roscoe,
A. Rossi,
Y. Rozen,
K. Runge,
O. Runolfsson,
D. R. Rust,
K. Sachs,
T. Saeki,
O. Sahr,
W.M. Sang,
E. K.G. Sarkisyan,
C. Sbarra,
A. D. Schaile,
O. Schaile,
P. Scharff-Hansen,
S. Schmitt,
A. Schöning,
M. Schröder,
M. Schumacher,
C. Schwick,
W. G. Scott,
R. Seuster,
T. Shears,
B. C. Shen,
C. H. Shepherd-Themistocleous,
P. Sherwood,
G. P. Siroli,
A. Skuja,
A. M. Smith,
G. A. Snow,
R. Sobie,
S. SöldnerRembold,
S. Spagnolo,
M. Sproston,
A. Stahl,
K. Stephens,
K. Stoll,
D. Strom,
R. Ströhmer,
B. Surrow,
S. D. Talbot,
S. Tarem,
R. J. Taylor,
R. J. Teuscher,
M. Thiergen,
J. O. Thomas,
M. Thomson,
E. Torrence,
S. Towers,
T. Trefzger,
I. M. Trigger,
Z. Trócsńnyi,
E. Tsur,
M. F. Watson,
I. Ueda,
R. Van Kooten,
P. Vannerem,
M. Verzocchi,
H. Voss,
D. Waller,
C. P. Ward,
D. R. Ward,
P. M. Watkins,
A. T. Watson,
N. K. Watson,
P. S. Wells,
T. Wengler,
N. Wermes,
G. Wilson,
J. A. Wilson,
T. R. Wyatt,
Shinji Yamashita,
V. Zacek,
D. Zer-Zion
Publication year - 2000
Publication title -
the european physical journal c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.938
H-Index - 198
eISSN - 1434-6052
pISSN - 1434-6044
DOI - 10.1007/s100520000407
Subject(s) - physics , hadron , pion , transverse plane , particle physics , nuclear physics , correlation function (quantum field theory) , string (physics) , mathematical physics , quantum mechanics , structural engineering , dielectric , engineering
Bose-Einstein correlations in pairs of identical charged pions produced in a sample of 4.3 million Z\(^0\) hadronic decays are studied as a function of the three components of the momentum difference, transverse (“out” and “side”) and longitudinal with respect to the thrust direction of the event. A significant difference between the transverse, r\(_{t_{side}}\), and longitudinal, r\(_l\), dimensions is observed, indicating that the emitting source of identical pions, as observed in the Longitudinally CoMoving System, has an elongated shape. This is observed with a variety of selection techniques. Specifically, the values of the parameters obtained by fitting the extended Goldhaber parametrisation to the correlation function ${\mathrm C'} ={\mathrm C^{DATA}}/{\mathrm C^{MC}}$ for two-jet events, selected with the Durham algorithm and resolution parameter y\(_{cut}\) = 0.04, are r\(_{t_{side}}\) = (0.809 \(\pm\) 0.009 (stat) \(^{+0.019}_{-0.032}\) (syst)) fm, r\(_l\) = (0.989 \(\pm\) 0.011 (stat) \(^{+0.030}_{-0.015}\) ({\it syst})) fm and r\(_l\)/r\(_{t_{side}}\) = 1.222 \(\pm\) 0.027 (stat) \(^{+0.075}_{-0.012}\) (syst). The results are discussed in the context of a recent model of Bose-Einstein correlations based on string fragmentation. The results of a unidimensional analysis are also presented.

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