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Determination Of Alphas S In First And Second Order Qcd From E E Ee Annihilation Into Hadrons
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Book Synopsis Determination of [alpha]s [s] in first and second order QCD from e+e- [ee] annihilation into hadrons by : Deutsches Elektronen-Synchrotron (Hamburg)
Download or read book Determination of [alpha]s [s] in first and second order QCD from e+e- [ee] annihilation into hadrons written by Deutsches Elektronen-Synchrotron (Hamburg) and published by . This book was released on 1984 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of αs [s] in first and second order QCD from e+e- [ee] annihilation into hadrons by :
Download or read book Determination of αs [s] in first and second order QCD from e+e- [ee] annihilation into hadrons written by and published by . This book was released on 1984 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of ®[subscript S] in First and Second Order QCD from E+e- Annihilation Into Hadrons by : TASSO Collaboration
Download or read book Determination of ®[subscript S] in First and Second Order QCD from E+e- Annihilation Into Hadrons written by TASSO Collaboration and published by . This book was released on 1984 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of irst and second order QCD from e- annihilation into hadrons by :
Download or read book Determination of irst and second order QCD from e- annihilation into hadrons written by and published by . This book was released on 1984 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the model dependence of the determination of the strong coupling constant in second order QCD form e_1hn+e_1hn- [ee] annihilation into hadrons by :
Download or read book On the model dependence of the determination of the strong coupling constant in second order QCD form e_1hn+e_1hn- [ee] annihilation into hadrons written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Model Dependence of the Determination of the Strong Coupling Constant in Second Order QCD from E+e- -annihilation Into Hadrons by : CELLO Collaboration
Download or read book On the Model Dependence of the Determination of the Strong Coupling Constant in Second Order QCD from E+e- -annihilation Into Hadrons written by CELLO Collaboration and published by . This book was released on 1983 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Energy Physics Index written by and published by . This book was released on 1984 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Results on [alpha]{sub S} and QCD from (and Above) the Z° by :
Download or read book Results on [alpha]{sub S} and QCD from (and Above) the Z° written by and published by . This book was released on 1997 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: In electron-positron annihilation hadronic activity is, by construction, limited to the final state, making the study of hadronic events cleaner and simpler relative to lepton-hadron and hadron-hadron collisions, from both the experimental and theoretical points-of-view. To be specific, samples of hadronic events can be selected by experiments at the Z° resonance with efficiency and purity of better than 99%. Jet and event-shape observables have been calculated at next-to-leading order, O([alpha]{sub s}2), and some inclusive observables have been calculated at O([alpha]{sub s}3). Non-perturbative calculations, in the form of power corrections to perturbatively-evaluated observables, have been performed, and there are well-understood models of hadronization that have been carefully tuned to the data collected over the past 20 years. Electron-positron annihilation thus provides an ideal environment for precise tests of QCD, and has yielded spectacular results. Here, measurements of [alpha]{sub s} from ee− annihilation experiments are reviewed and compared with measurements from other processes. Highlights are presented of recent QCD studies in ee− annihilation at the Z° resonance.
Download or read book Determination of Alpha written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied the energy-energy correlation in ee− annihilation into hadrons at .sqrt.s = 29 GeV using the Mark II detector at PEP. We find to O(.cap alpha./sub s/2) that .cap alpha./sub s/ = 0.158 +- 003 +- 008 if hadronization is described by string fragmentation. Independent fragmentation schemes give .cap alpha./sub s/ = .10 - 14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well.
Book Synopsis Determination of [alpha]{sub S}(M{sub Z}2) from Hadronic Event Shape Observables in Ee− Annihilation by :
Download or read book Determination of [alpha]{sub S}(M{sub Z}2) from Hadronic Event Shape Observables in Ee− Annihilation written by and published by . This book was released on 1996 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important tasks in high energy physics is the precise determination of the strong coupling [alpha]{sub s}(M{sub Z}2). Not only does measurement of [alpha]{sub s}(M{sub Z}2) in different hard processes and at different hard scales Q provide a fundamental test of the theory of strong interactions, Quantum Chromodynamics (QCD), but it also allows constraints on extensions to the Standard Model of elementary particles. Here, the determination of [alpha]{sub s}(M{sub Z}2) using O([alpha]{sub s}2) calculations of hadronic event shape observables in ee− annihilation is reviewed. The large scatter among [alpha]{sub s}(M{sub Z}2) values determined from different observables may be interpreted as arising from the effect of uncalculated higher-order contributions. The application of optimized perturbation theory and Pade approximants in an attempt to reduce this effect is discussed.
Book Synopsis Determination of Alpha/sub S/ from Energy-energy Correlations in Ee− Annihilation at 29 GeV. by :
Download or read book Determination of Alpha/sub S/ from Energy-energy Correlations in Ee− Annihilation at 29 GeV. written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied the energy-energy correlation in ee− annihilation into hadrons at .sqrt.s = 29 GeV using the Mark II detector at PEP. We find to O(.cap alpha./sub s/2) that .cap alpha./sub s/ = 0.158 +- 003 +- 008 if hadronization is described by string fragmentation. Independent fragmentation schemes give .cap alpha./sub s/ = .10 - 14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well.
Book Synopsis Determination of \ga\us in Second Order QCD from Hadronic Z Decays by : P. Abreu
Download or read book Determination of \ga\us in Second Order QCD from Hadronic Z Decays written by P. Abreu and published by . This book was released on 1992 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Higher Order QCD Corrections in E+e- Annihilation Into Hadrons by : G. Schierholz
Download or read book Higher Order QCD Corrections in E+e- Annihilation Into Hadrons written by G. Schierholz and published by . This book was released on 1980 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination Of[alpha][sub S](M[sub Z][sup 2] from Hadronic Event Shape Observables in E[sup+]e[sup[minus] Annihilation by :
Download or read book Determination Of[alpha][sub S](M[sub Z][sup 2] from Hadronic Event Shape Observables in E[sup+]e[sup[minus] Annihilation written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important tasks in high energy physics is the precise determination of the strong coupling[alpha][sub s](M[sub Z][sup 2]). Not only does measurement of[alpha][sub s](M[sub Z][sup 2]) in different hard processes and at different hard scales Q provide a fundamental test of the theory of strong interactions, Quantum Chromodynamics (QCD), but it also allows constraints on extensions to the Standard Model of elementary particles. Here, the determination of[alpha][sub s](M[sub Z][sup 2]) using O([alpha][sub s][sup 2]) calculations of hadronic event shape observables in e[sup+]e[sup[minus]] annihilation is reviewed. The large scatter among[alpha][sub s](M[sub Z][sup 2]) values determined from different observables may be interpreted as arising from the effect of uncalculated higher-order contributions. The application of optimized perturbation theory and Pade approximants in an attempt to reduce this effect is discussed.
Book Synopsis Higher order QCD corrections in e- annihilation into hadrons by : G. Schierholz
Download or read book Higher order QCD corrections in e- annihilation into hadrons written by G. Schierholz and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination Of. Alpha. Sub S from a Differential Jet Multiplicity Distribution at SLC and PEP. by :
Download or read book Determination Of. Alpha. Sub S from a Differential Jet Multiplicity Distribution at SLC and PEP. written by and published by . This book was released on 1990 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Results On[alpha][sub S] and QCD from (and Above) the Z[sup 0]. by :
Download or read book Results On[alpha][sub S] and QCD from (and Above) the Z[sup 0]. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In electron-positron annihilation hadronic activity is, by construction, limited to the final state, making the study of hadronic events cleaner and simpler relative to lepton-hadron and hadron-hadron collisions, from both the experimental and theoretical points-of-view. To be specific, samples of hadronic events can be selected by experiments at the Z[sup 0] resonance with efficiency and purity of better than 99%. Jet and event-shape observables have been calculated at next-to-leading order, O([alpha][sub s][sup 2]), and some inclusive observables have been calculated at O([alpha][sub s][sup 3]). Non-perturbative calculations, in the form of power corrections to perturbatively-evaluated observables, have been performed, and there are well-understood models of hadronization that have been carefully tuned to the data collected over the past 20 years. Electron-positron annihilation thus provides an ideal environment for precise tests of QCD, and has yielded spectacular results. Here, measurements of[alpha][sub s] from e[sup+]e[sup[minus]] annihilation experiments are reviewed and compared with measurements from other processes. Highlights are presented of recent QCD studies in e[sup+]e[sup[minus]] annihilation at the Z[sup 0] resonance.
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