Measurement of αs from energy-energy correlations at the Z0 resonance

SLD Collaboration

doi:10.1103/PhysRevD.50.5580

Measurement of α_s from energy-energy correlations at the Z⁰ resonance

SLD Collaboration

Tohoku University
University of Illinois at Urbana-Champaign
Stanford Linear Accelerator Center, Stanford University
University of Padua
Rutgers - The State University of New Jersey, New Brunswick
Yale University
University of Wisconsin-Madison
University of Colorado Boulder
Nagoya University
Columbia University
National Institute for Nuclear Physics
University of Perugia
University of California at Santa Cruz
University of Oregon
University of Tennessee, Knoxville
University of Washington
University of California at Santa Barbara
University of Ferrara
University of Pisa
University of Genoa
Boston University
Brunel University London
Massachusetts Institute of Technology
University of Cincinnati
Rutherford Appleton Laboratory

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

We determine the strong coupling α_s from a comprehensive study of energy-energy correlations (EEC) and their asymmetry (AEEC) in hadronic decays of Z⁰ bosons collected by the SLD experiment at SLAC. The data are compared with all four available predictions of QCD calculated up to O(α² _s) in perturbation theory, and also with a resummed calculation matched to all four of these calculations. We find large discrepancies between a, values extracted from the different O(α² _s) calculations. We also find a large renormalization scale ambiguity in α_s determined from the EEC using the 0(α² _s) calculations; this ambiguity is reduced in the case of the AEEC and is very small when the matched calculations are used. Averaging over all calculations, and over the EEC and AEEC results, we obtain α_s(M² _z) = 0.124^+0.003 _-0.004(expt.)±0.009(theory).

Original language	English
Pages (from-to)	5580-5590
Number of pages	11
Journal	Physical Review D
Volume	50
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.50.5580
State	Published - 1994

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@article{f9ba1c37b8a24002ba0030d3ea9b5203,

title = "Measurement of αs from energy-energy correlations at the Z0 resonance",

abstract = "We determine the strong coupling αs from a comprehensive study of energy-energy correlations (EEC) and their asymmetry (AEEC) in hadronic decays of Z0 bosons collected by the SLD experiment at SLAC. The data are compared with all four available predictions of QCD calculated up to O(α2 s) in perturbation theory, and also with a resummed calculation matched to all four of these calculations. We find large discrepancies between a, values extracted from the different O(α2 s) calculations. We also find a large renormalization scale ambiguity in αs determined from the EEC using the 0(α2 s) calculations; this ambiguity is reduced in the case of the AEEC and is very small when the matched calculations are used. Averaging over all calculations, and over the EEC and AEEC results, we obtain αs(M2 z) = 0.124+0.003 -0.004(expt.)±0.009(theory).",

author = "\{SLD Collaboration\} and K. Abe and I. Abt and Ash, \{W. W.\} and D. Aston and N. Bacchetta and Baird, \{K. G.\} and C. Baltay and Band, \{H. R.\} and Barakat, \{M. B.\} and G. Baranko and O. Bardon and T. Barklow and Bazarko, \{A. O.\} and R. Ben-David and Benvenuti, \{A. C.\} and T. Bienz and Bilei, \{G. M.\} and D. Bisello and G. Blaylock and Bogart, \{J. R.\} and T. Bolton and Bower, \{G. R.\} and Brau, \{J. E.\} and M. Breidenbach and Bugg, \{W. M.\} and D. Burke and Burnett, \{T. H.\} and Burrows, \{P. N.\} and W. Busza and A. Caicaterra and Caldwell, \{D. O.\} and D. Calloway and B. Camanzi and M. Carpinelli and R. Cassell and R. Castaldi and A. Castro and M. Cavalli-Sforza and E. Church and Cohn, \{H. O.\} and Coller, \{J. A.\} and V. Cook and R. Cotton and Cowan, \{R. F.\} and Coyne, \{D. G.\} and A. D'Oliveira and Damerell, \{C. J.S.\} and S. Dasu and \{De Sangro\}, R. and H. Park",

note = "Publisher Copyright: {\textcopyright} 1994 The American Physical Society.",

year = "1994",

doi = "10.1103/PhysRevD.50.5580",

language = "English",

volume = "50",

pages = "5580--5590",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "9",

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TY - JOUR

T1 - Measurement of αs from energy-energy correlations at the Z0 resonance

AU - SLD Collaboration

AU - Abe, K.

AU - Abt, I.

AU - Ash, W. W.

AU - Aston, D.

AU - Bacchetta, N.

AU - Baird, K. G.

AU - Baltay, C.

AU - Band, H. R.

AU - Barakat, M. B.

AU - Baranko, G.

AU - Bardon, O.

AU - Barklow, T.

AU - Bazarko, A. O.

AU - Ben-David, R.

AU - Benvenuti, A. C.

AU - Bienz, T.

AU - Bilei, G. M.

AU - Bisello, D.

AU - Blaylock, G.

AU - Bogart, J. R.

AU - Bolton, T.

AU - Bower, G. R.

AU - Brau, J. E.

AU - Breidenbach, M.

AU - Bugg, W. M.

AU - Burke, D.

AU - Burnett, T. H.

AU - Burrows, P. N.

AU - Busza, W.

AU - Caicaterra, A.

AU - Caldwell, D. O.

AU - Calloway, D.

AU - Camanzi, B.

AU - Carpinelli, M.

AU - Cassell, R.

AU - Castaldi, R.

AU - Castro, A.

AU - Cavalli-Sforza, M.

AU - Church, E.

AU - Cohn, H. O.

AU - Coller, J. A.

AU - Cook, V.

AU - Cotton, R.

AU - Cowan, R. F.

AU - Coyne, D. G.

AU - D'Oliveira, A.

AU - Damerell, C. J.S.

AU - Dasu, S.

AU - De Sangro, R.

AU - Park, H.

PY - 1994

Y1 - 1994

N2 - We determine the strong coupling αs from a comprehensive study of energy-energy correlations (EEC) and their asymmetry (AEEC) in hadronic decays of Z0 bosons collected by the SLD experiment at SLAC. The data are compared with all four available predictions of QCD calculated up to O(α2 s) in perturbation theory, and also with a resummed calculation matched to all four of these calculations. We find large discrepancies between a, values extracted from the different O(α2 s) calculations. We also find a large renormalization scale ambiguity in αs determined from the EEC using the 0(α2 s) calculations; this ambiguity is reduced in the case of the AEEC and is very small when the matched calculations are used. Averaging over all calculations, and over the EEC and AEEC results, we obtain αs(M2 z) = 0.124+0.003 -0.004(expt.)±0.009(theory).

AB - We determine the strong coupling αs from a comprehensive study of energy-energy correlations (EEC) and their asymmetry (AEEC) in hadronic decays of Z0 bosons collected by the SLD experiment at SLAC. The data are compared with all four available predictions of QCD calculated up to O(α2 s) in perturbation theory, and also with a resummed calculation matched to all four of these calculations. We find large discrepancies between a, values extracted from the different O(α2 s) calculations. We also find a large renormalization scale ambiguity in αs determined from the EEC using the 0(α2 s) calculations; this ambiguity is reduced in the case of the AEEC and is very small when the matched calculations are used. Averaging over all calculations, and over the EEC and AEEC results, we obtain αs(M2 z) = 0.124+0.003 -0.004(expt.)±0.009(theory).

UR - https://www.scopus.com/pages/publications/0011106601

U2 - 10.1103/PhysRevD.50.5580

DO - 10.1103/PhysRevD.50.5580

M3 - Article

AN - SCOPUS:0011106601

SN - 0556-2821

VL - 50

SP - 5580

EP - 5590

JO - Physical Review D

JF - Physical Review D

IS - 9

ER -

Measurement of α_s from energy-energy correlations at the Z⁰ resonance

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