z-logo
open-access-imgOpen Access
Improved tau polarisation measurement
Author(s) -
D. Buskulic,
D. W. Casper,
I. De Bonis,
D. Décamp,
Ph. Ghez,
C. Goy,
J.-P. Lees,
M.-N. Minard,
P. Odier,
B. Pietrzyk,
F. Ariztizabal,
M. Chmeissani,
J.M. Crespo,
I. Efthymiopoulos,
E. Fernández,
M. Bosman,
V. Gaitan,
Ll. Garrido,
M. Martı́nez,
S. Orteu,
A. Pacheco,
C. Padilla Aranda,
F. Palla,
Á. Pascual,
J.A. Perlas,
F. Sánchez,
F. Teubert,
D. Creanza,
M. De Palma,
A. Farilla,
G. Iaselli,
G. Maggi,
N. Marinelli,
S. Natali,
S. Nuzzo,
A. Ranieri,
G. Raso,
F. Romanò,
F. Ruggieri,
G. Selvaggi,
L. Silvestris,
P. Tempesta,
G. Zito,
X. Huang,
J. Lin,
Q. Ouyang,
T. Wang,
Y. Xie,
R. Xu,
She-Sheng Xue,
J. Zhang,
L. Zhang,
W. Zhao,
G. Bonvicini,
M. Cattaneo,
P. Comas,
P. Coyle,
H. Drevermann,
A. Engelhardt,
R.W. Forty,
M. Frank,
M. Girone,
R. Hagelberg,
J. Harvey,
R. Jacobsen,
P. Janot,
B. Jost,
J. Knobloch,
I. Lehraus,
M. Maggi,
C. Markou,
E.B. Martin,
P. Mató,
H. Meinhard,
A. Minten,
R. Miquel,
T. Oest,
P. Palazzi,
J. R. Pater,
P. Perrodo,
J.-F. Pusztaszeri,
F. Ranjard,
P. Rensing,
G. Rolandi,
D. Schlatter,
M. Schmelling,
O. Schneider,
W. Tejessy,
I. R. Tomalin,
A. Venturi,
H. Wachsmuth,
W. Wiedenmann,
T. Wildish,
W. Witzeling,
J. Wotschack,
Z. Ajaltouni,
M. Bardadin-Otwinowska,
A. Barrès,
C. Boyer,
A. Falvard,
P. Gay,
C. Guicheney,
P. Henrard,
J. Jousset,
B. Michel,
S. Monteil,
J-C. Montret,
D. Pallin,
P. Perret,
F. Podlyski,
J. Proriol,
J.-M. Rossignol,
F. Saadi,
T. Fearnley,
J. B. Hansen,
P. H. Hansen,
B.S. Nilsson,
A. Kyriakis,
E. Simopoulou,
I. Siotis,
A. Vayaki,
K. Zachariadou,
A. Blondel,
G. Bonneaud,
J. C. Brient,
Pierre Bourdon,
L. Passalacqua,
A. Rougé,
M. Rumpf,
R. Tanaka,
A. Valassi,
M. Verderi,
H. Videau,
D.J. Candlin,
M. I. Parsons,
E. Focardi,
G. Parrini,
M. Corden,
M. Delfino,
C. Georgiopoulos,
D. E. Jaffe,
A. Antonelli,
G. Bencivenni,
G. Bologna,
F. Bossi,
P. Campana,
G. Capon,
F. Cerutti,
V. Chiarella,
G. Felici,
P. Laurelli,
G. Mannocchi,
F. Murtas,
G.P. Murtas,
M. Pepe-Altarelli,
S. J. Dorris,
A. W. Halley,
I. ten Have,
I. G. Knowles,
J. G. Lynch,
W. T. Morton,
V. OʼShea,
C. Raine,
P. Reeves,
J. M. Scarr,
K. Smith,
M. G. Smith,
A. S. Thompson,
F. Thompson,
S. Thorn,
R.M. Turnbull,
U. Becker,
O. Braun,
C. Geweniger,
G. Graefe,
P. Hanke,
V. Hepp,
E. E. Kluge,
A. Putzer,
B. Rensch,
M. A. Schmidt,
J. Sommer,
H. Stenzel,
K. Tittel,
M. Wunsch,
R. Beuselinck,
D.M. Binnie,
W. Cameron,
D. Colling,
P.J. Dornan,
N. Konstantinidis,
L. Moneta,
A. Moutoussi,
J. Nash,
G. San Martin,
J. K. Sedgbeer,
A. M. Stacey,
G. Dissertori,
P. Girtler,
E. Kneringer,
D. Kuhn,
G. Rudolph,
C.K. Bowdery,
T.J. Brodbeck,
P. Colrain,
G. Crawford,
A.J. Finch,
F. Foster,
G. Hughes,
T. Sloan,
E. P. Whelan,
Mike Williams,
A. Galla,
A.M. Greene,
K. Kleinknecht,
G. Quast,
J. Raab,
B. Renk,
H. G. Sander,
R. Wanke,
C. Zeitnitz,
J.J. Aubert,
A. M. Bencheikh,
C. Benchouk,
A. Bonissent,
G. Bujosa,
D. Calvet,
J. Carr,
C. Diaconu,
F. Etienne,
M. Thulasidas,
D. Nicod,
P. Payre,
D. Rousseau,
M. Talby,
I. Abt,
R. Aßmann,
C. Bauer,
W. Blum,
D. Brown,
H. Dietl,
F. Dydak,
C. Gotzhein,
K. Jakobs,
H. Kroha,
G. Lütjens,
G. Lutz,
W. Männer,
H. G. Moser,
R. Richter,
A. Rosado-Schlosser,
A. S. Schwarz,
R. Settles,
H. Seywerd,
U. Stierlin,
R. St. Denis,
R. Alemany,
J. Boucrot,
O. Callot,
A. Cordier,
F. Courault,
M. Davier,
L. Duflot,
J.-F. Grivaz,
Ph. Heusse,
M. Jacquet,
D. W. Kim,
F. Le Diberder,
J. Lefrançois,
A. M. Lutz,
G. Musolino,
I. Nikolic,
H. J. Park,
I.C. Park,
M. H. Schune,
S. Simion,
J.-J. Veillet,
I. Videau,
P. Azzurri,
D. Abbaneo,
G. Bagliesi,
G. Batignani,
S. Bettarini,
C. Bozzi,
G. Calderini,
M. Carpinelli,
M. A. Ciocci,
V. Ciulli,
R. Dell’Orso,
I. Ferrante,
L. Foà,
F. Forti,
A. Giassi,
M. A. Giorgi,
A. Gregorio,
F. Ligabue,
A. Lusiani,
P.S. Marrocchesi,
A. Messineo,
G. Rizzo,
G. Sanguinetti,
A. Sciabà,
P. Spagnolo,
J. Steinberger,
R. Tenchini,
G. Tonelli,
G. Triggiani,
C. Vannini,
P. Dini,
J. Walsh,
A.P. Betteridge,
G.A. Blair,
L. M. Bryant,
Y. Gao,
M. G. Green,
D. L. Johnson,
T. Medcalf,
Ll M. Mir,
J.A. Strong,
V. Bertin,
D. R. Botterill,
R.W. Clifft,
T.R. Edgecock,
S. Haywood,
M. Edwards,
P. Maley,
P.R. Norton,
J.C. Thompson,
B. Bloch-Devaux,
P. Colas,
H. Duarte,
S. Emery,
W. Kozanecki,
E. Lançon,
M.C. Lemaire,
E. Locci,
B. Marx,
P. Perez,
J. Rander,
J.-F. Renardy,
A. Rosowsky,
A. Roussarie,
J.-P. Schuller,
J. Schwindling,
D. Si Mohand,
A. Trabelsi,
B. Vallage,
R. P. Johnson,
A. M. Litke,
G. Taylor,
J. Wear,
A. Beddall,
C.N. Booth,
R. Boswell,
S. Cartwright,
F. Combley,
I. Dawson,
A. Koksal,
M. Letho,
W. M. Newton,
C. Rankin,
L.F. Thompson,
A. Böhrer,
S. Brandt,
G. Cowan,
E. Feigl,
C. Grupen,
G. Lutters,
J. Minguet-Rodriguez,
F. Rivera,
P. Saraiva,
L. Smolik,
F. Stephan,
L. Bosisio,
R. Marina,
G. Ganis,
G. Giannini,
B. Gobbo,
L. Pitis,
F. Ragusa,
H. Kim,
J. Rothberg,
S. Wasserbaech,
S.R. Armstrong,
L. Bellantoni,
P. Elmer,
Z. Feng,
D.P.S. Ferguson,
Y. S. Gao,
S. González,
J. Grahl,
J. L. Harton,
O. J. Hayes,
H. Hu,
P.A. McNamara,
J. M. Nachtman,
W. Orejudos,
Y. B. Pan,
Y. Saadi,
M. Schmitt,
I. J. Scott,
Vivek Sharma,
J. D. Turk,
A. M. Walsh,
F.V. Weber,
S. L. Wu,
X. Wu,
J.M. Yamartino,
M. Zheng,
G. Zobernig
Publication year - 1995
Publication title -
zeitschrift für physik c
Language(s) - English
Resource type - Journals
eISSN - 1431-5858
pISSN - 0170-9739
DOI - 10.1007/bf02907399
Subject(s) - physics , lepton , aleph , electron–positron annihilation , universality (dynamical systems) , particle physics , nuclear physics , bar (unit) , resonance (particle physics) , condensed matter physics , hadron , electron , meteorology
Using 22 pb(-1) of data collected at LEP in 1992 on the peak of the Z resonance, the ALEPH collaboration has measured the polarisation of the tau leptons decaying into e (nu)over bar nu , mu (nu)over bar nu,pi nu and a(1) nu from their individual decay product distributions. The measurement of the tau polarisation as a function of the production polar angle yields the two parameters A(tau) and A(e), where, in terms of the axial and vector couplings g(A_l) and g(V_l), A(l) = 2 g(V_ l) g(A_l)/(g(V_ l)^2 + g(A_l)^2). This analysis follows to a large extent the methods devised for the 1990 and 1991 data but with improvements which bring a better understanding of the systematic uncertainties. Combining the 1992 measurements with our previously published results yields A(tau) = 0.136 +/- 0.012 +/- 0.009 and A(e) = 0.129 +/- 0.016 +/- 0.005. Assuming e-tau universality, the measurements imply an effective weak mixing angle of sin(2) theta(W)(eff) = 0.2332 +/- 0.0014

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here
Accelerating Research

Address

John Eccles House
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom