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Book Determination of the QCD Coupling Asalpha S

Download or read book Determination of the QCD Coupling Asalpha S written by Siegfried Bethke and published by . This book was released on 2000 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determination of the QCD Coupling   s  alpha S

Download or read book Determination of the QCD Coupling s alpha S written by Siegfried Bethke and published by . This book was released on 2000 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determination of the Strong Coupling Constant   alpha s  and a Test of Perturbative QCD Using W  Jets Processes in the D   Detector

Download or read book Determination of the Strong Coupling Constant alpha s and a Test of Perturbative QCD Using W Jets Processes in the D Detector written by Jaehoon Yu and published by . This book was released on 1993 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determination of the Strong Coupling Constant   alpha  sub S   and a Test of Perturbative QCD Using W   Jets Processes in the D0 Detector

Download or read book Determination of the Strong Coupling Constant alpha sub S and a Test of Perturbative QCD Using W Jets Processes in the D0 Detector written by and published by . This book was released on 1993 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: The D0 experiment has accumulated data for a study of inclusive W production corresponding to a total integrated luminosity of 14.3 ± 1.7 pb−1 during the 1992--1993 Fermilab Tevatron collider run. The total number of W → e + [nu] candidates is 9770. The ratio of the number of W + 1 jet events to that of W + 0 jet events has been measured as a function of jet minimum E{sub T}. Using this ratio the strong coupling constant, [alpha]{sub s} at Q2 = M{sub W}2 is measured to be [alpha]{sub s}(M{sub W}2) = 0.124 ± 0.005(stat) ± 0.006(MC) ± 0.008(theory){sub -0.022}{sup +0.026}(sys) or ({sub -0.025}{sup +0.028} combined) with a jet minimum E{sub T} of 25 GeV. A quantitative test of perturbative QCD has been made by comparing the experimentally measured ratio with the theoretical predictions. The theoretical predictions of the ratio in both the leading order and next-to-leading order are in good agreement with the measured ratio.

Book Experimental Determination of an Effective Coupling Constant

Download or read book Experimental Determination of an Effective Coupling Constant written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum chromodynamics (QCD), the theory of the strong force, describes the interactions of two basic building blocks of matter: quarks and gluons. High precision data taken at the Jefferson Lab electron accelerator provide a solid basis for the detailed study of many aspects of QCD. The accelerator's beam energy permits investigations of the transition between the short distance and long distance regimes of the strong force. Understanding how the descriptions of these regimes are related is essential in comprehending the structure of ordinary matter. Using new data from polarized electron - nucleon scattering, we extract the scale dependence of an effective strong coupling constant, $\alpha_{\rm{s}}^{\rm{eff}}$. Our result shows that this effective charge freezes, i.e. loses its scale dependence, at long (nucleon-size) distances. This finite behavior allows us to obtain a physical coupling constant for the strong interaction that is relevant at all scales.

Book Determination of the Strong Coupling Constant Up to Complete Second Order in QCD

Download or read book Determination of the Strong Coupling Constant Up to Complete Second Order in QCD written by Ren-yuan Zhu and published by . This book was released on 1983 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determination of the Effective Strong Coupling Constant   alpha  s  G 1  Q 2   from CLAS Spin Structure Function Data

Download or read book Determination of the Effective Strong Coupling Constant alpha s G 1 Q 2 from CLAS Spin Structure Function Data written by and published by . This book was released on 2008 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a new extraction of the effective strong coupling constant $\alpha_{s, g_1}(Q^2)$. The result agrees with a previous determination and extends the measurement of the low and high $Q^2$ behavior of $\alpha_{s, g_1}(Q^2)$ that was previously deduced from sum rules. In particular, it experimentally verifies the lack of $Q^2$-dependence of $\alpha_{s, g_1}(Q^2)$ in the low $Q^2$ limit. This fact is necessary for application of the AdS/CFT correspondence to QCD calculations. We provide a physics motivated parameterization of $\alpha_{s, g_1}(Q^2)$ that can equivalently be used to parameterize the $Q^2$-dependence of the generalized Gerasimov-Drell-Hearn and Bjorken sums.

Book MEASURING THE QCD COUPLING CONSTANT ALPHA SUB S  INSIDE A NUCLEUS

Download or read book MEASURING THE QCD COUPLING CONSTANT ALPHA SUB S INSIDE A NUCLEUS written by P. Hoodbhoy and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book On the Behavior of the Effective QCD Coupling  alpha  sub  tau   s at Low Scales

Download or read book On the Behavior of the Effective QCD Coupling alpha sub tau s at Low Scales written by and published by . This book was released on 2002 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Experimental Determination of the Effective Strong Coupling Constant

Download or read book Experimental Determination of the Effective Strong Coupling Constant written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We extract an effective strong coupling constant from low Q2 data on the Bjorken sum. Using sum rules, we establish its Q2-behavior over the complete Q2-range. The result is compared to effective coupling constants extracted from different processes and to calculations based on Schwinger-Dyson equations, hadron spectroscopy or lattice QCD. Although the connection between the experimentally extracted effective coupling constant and the calculations is not clear, the results agree surprisingly well.

Book Measuring the QCD Coupling Constant    alfa  S   Inside a Nucleus

Download or read book Measuring the QCD Coupling Constant alfa S Inside a Nucleus written by P. Hoodbhoy and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determinations of the QCD Strong Coupling    s and the Scale    QCD

Download or read book Determinations of the QCD Strong Coupling s and the Scale QCD written by Dennis W. Duke and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Measuring the QCD Coupling Constant  alpha s Inside a Nucleus

Download or read book Measuring the QCD Coupling Constant alpha s Inside a Nucleus written by Pervez Hoodbhoy and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determinations of the QCD strong coupling alpha s and the scale Lambda QCD

Download or read book Determinations of the QCD strong coupling alpha s and the scale Lambda QCD written by Dennis W. Duke and published by . This book was released on 1985 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Determining the SUSY QCD Yukawa Coupling

Download or read book Determining the SUSY QCD Yukawa Coupling written by and published by . This book was released on 2006 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: