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Measurement of the τ lifetime
Author(s) -
P.D. Acton,
G. Alexander,
J. Allison,
P. P. Allport,
K. J. Anderson,
S. Arcelli,
A. Astbury,
D. Axen,
G. Azuelos,
G.A. Bahan,
J. T. Baines,
A. H. Ball,
J. Banks,
R. J. Barlow,
S. Barnett,
J. R. Batley,
G. Beaudoin,
A. Beck,
J. Becker,
T. Behnke,
K. W. Bell,
G. Bella,
P. Bentkowski,
P. Berlich,
S. Bethke,
O. Biebel,
U. Binder,
I.J. Bloodworth,
P. Bock,
B. Boden,
H. M. Bosch,
H. Breuker,
P. Brieght-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,
D. G. Charlton,
S. L. Chu,
P. E. L. Clarke,
I. Cohen,
J. C. Clayton,
W.J. Collins,
J.E. Conboy,
M. Cooper,
M. Coupland,
M. Cuffiani,
S. Dado,
G. M. Dallavalle,
S. J. de Jong,
L.A. del Pozo,
Huiqiu Deng,
A. Dieckmann,
M. Dittmar,
M.S. Dixit,
E. 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,
M. Fierro,
M. Fincke-Keeler,
H.M. Fischer,
D.G. Fong,
M. Foucher,
A. Gaidot,
O. Ganel,
J. W. Gary,
J. Gascon,
R.F. McGowan,
N. I. Geddes,
Ch. Geich-Gimbel,
S.W. Gensler,
F. X. Gentit,
P. Giacomelli,
R. Giacomelli,
V. Gibson,
W.R. Gibson,
J.D. Gillies,
J. Goldberg,
M.J. Goodrick,
W. Gorn,
C. Grandi,
F.C. Grant,
J. Hagemann,
Gail Hanson,
M. Hansroul,
C. K. Hargrove,
P. F. Harrison,
J.C. Hart,
P.M. Hattersley,
M. Hauschild,
C. M. Hawkes,
E. Heflin,
R.J. Hemingway,
R.D. Heuer,
J. C. Hill,
S. J. Hillier,
T. Hilse,
D. A. Hinshaw,
J. Hobbs,
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. C. Janissen,
A. Jawahery,
P.W. Jeffreys,
H. Jérémie,
M. Jimack,
M. Jobes,
R. W. L. Jones,
P. Jovanović,
C. C. H. Jui,
D. Karlen,
K. Kawagoe,
T. Kawamoto,
R. Keeler,
R. G. Kellogg,
B. W. Kennedy,
S. Kluth,
T. Kobayashi,
D. S. Koetke,
T. Kokott,
S. Komamiya,
L. Köpke,
J. F. Kral,
R. Kowalewski,
J. von Krogh,
J. Kroll,
M. Kuwano,
P. Kyberd,
G. Lafferty,
R. Lahmann,
F. Lamarche,
J. G. Layter,
P. Leblanc,
A.M. Lee,
M.H. Lehto,
D. Lellouch,
C. Leroy,
J. Letts,
S. Levegrün,
L. Levinson,
S. L. Lloyd,
F. K. Loebinger,
J.M. Lorah,
B. Lorazo,
M. J. Losty,
X. C. Lou,
J. Ludwig,
M. Mannelli,
S. Marcellini,
G. Maringer,
C. Markus,
A. J. Martin,
J.P. Martin,
T. Mashimo,
P. Mättig,
U. Maur,
J. A. McKenna,
T. McMahon,
J.R. McNutt,
F. Meijers,
D. Menszner,
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,
T. Mouthuy,
B. Nellen,
H. Nguyen,
M. Nozaki,
S.W. OʼNeale,
F. G. Oakham,
F. Odorici,
H. Ogren,
C. J. Oram,
M. J. Oreglia,
S. Orito,
J.P. Pansart,
B. Panzer-Steindel,
P. Paschievici,
G. N. Patrick,
N. Paz-Jaoshvili,
P. Pfister,
J. E. Pilcher,
J. L. Pinfold,
D. Pitman,
D. E. Plane,
P. Poffenberger,
B. Poli,
A. Pouladdej,
T.W. Pritchard,
H. Przysiezniak,
G. Quast,
M.W. Redmond,
D.L. Rees,
G. E. Richards,
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,
W. Schappert,
P. Scharff-Hansen,
P. Schenk,
B. Schmitt,
H. von der Schmitt,
S. Schreiber,
C. Schwick,
J. Schwiening,
W. G. Scott,
M. Settles,
T. Shears,
B. C. Shen,
C. H. Shepherd-Themistocleous,
P. Sherwood,
R. Shypit,
A. Simon,
P. Singh,
Gian Piero Siroli,
A. Skuja,
Andrew Smith,
T. J. Smith,
G. A. Snow,
R. Sobie,
R. W. Springer,
M. Sproston,
K. Stephens,
J. Steuerer,
R. Ströhmer,
D. Strom,
T. Takeshita,
P. Taras,
S. Tarem,
M. Tecchio,
P. Teixeira-Dias,
N. Tesch,
N.J. Thackray,
M. Thomson,
E. Torrente-Luján,
G. Tranströmer,
N. J. Tresilian,
T. Tsukamoto,
M.F. Turner,
G. Tysarczyk-Niemeyer,
D. Van den plas,
R. Van Kooten,
G. J. Dalen,
G. Vasseur,
C.J. Virtue,
A. Wagner,
D.L. Wagner,
C. Wahl,
Jeffrey P. Walker,
C. P. Ward,
D. R. Ward,
P. M. Watkins,
A. T. Watson,
N. K. Watson,
M. Weber,
P. Weber,
P. S. Wells,
N. Wermes,
M.A. Whalley,
G. Wilson,
J. A. Wilson,
V-H. Winterer,
T. Wlodek,
S. Wotton,
T. R. Wyatt,
R. Yaari,
A. Yeaman,
G. Yekutieli,
M. Yurko,
W. Zeuner,
G. T. Zorn
Publication year - 1993
Publication title -
zeitschrift für physik c
Language(s) - English
Resource type - Journals
eISSN - 1431-5858
pISSN - 0170-9739
DOI - 10.1007/bf01566683
Subject(s) - uncorrelated , detector , physics , analytical chemistry (journal) , nuclear physics , optics , statistics , mathematics , chemistry , chromatography
The t lifetime has been measured with the OPAL detector at LEP, from analyses using the impact parameters in decays to single charged tracks, and the decay lengths from t decays to three charged tracks. The 1991 sample of approximately 12300 t-pair events, of which 70% contain silicon microvertex detector information, has been combined with a re-analysis of the 5100 events recorded during 1990. The two statistically-independent determinations give:$$\begin{gathered} \tau (one - prong) = 296.4 \pm 7.1 (stat) \pm 3.8 (sys) fs, \hfill \\ \tau (three - prong) = 286.3 \pm 7.4 (stat) \pm 5.2 (sys) fs. \hfill \\ \end{gathered} $$ The weighted average of these results after combination of the uncorrelated systematic errors is:$$\tau _\tau = 291.9 \pm 5.1 (stat) \pm 3.1 (sys) fs.$$.

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