Ultrasoft Renormalization of the Potentials in vNRQCD: PhD Thesis of Maximilian Stahlhofen

 
9783838109756: Ultrasoft Renormalization of the Potentials in vNRQCD: PhD Thesis of Maximilian Stahlhofen

The effective field theory vNRQCD allows to describe among others the production of top-antitop pairs in electron-positron collisions at threshold, i.e. with very small relative velocity of the quarks. Potentially large logarithms of the velocity are systematically summed up and lead to a scale dependence of the Wilson coefficients of the theory. The missing contributions to the cross section for top-antitop production in the resonance region at next-to-next-to-leading logarithmic (NNLL) level are the so-called mixing contributions to the NNLL anomalous dimension of the S-wave production/annihilation current of the top quark pair. To calculate these one has to know the next-to-leading logarithmic (NLL) renormalization group running of so-called potentials (four-quark operators). The dominant contributions to the anomalous dimension of these potentials come from vNRQCD diagrams with ultrasoft gluon loops. The aim of this thesis is to derive the complete ultrasoft NLL running of the relevant potentials. Technical and conceptional issues are discussed and preliminary results are analyzed with regard to the consequences for the mentioned cross section and its theoretical uncertainty.

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Maximilian Stahlhofen, Dr. rer. nat..: Studies of general physicsat the Technische Universität München with focus on elementaryparticle physics, PhD studies at the Max-Planck-Institut fürPhysik in Munich, PhD in 2009.

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Stahlhofen, Maximilian
ISBN 10: 3838109759 ISBN 13: 9783838109756
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Book Description Book Condition: New. Publisher/Verlag: Südwestdeutscher Verlag für Hochschulschriften | PhD Thesis of Maximilian Stahlhofen | The effective field theory vNRQCD allows to describe among others the production of top-antitop pairs in electron-positron collisions at threshold, i.e. with very small relative velocity of the quarks. Potentially large logarithms of the velocity are systematically summed up and lead to a scale dependence of the Wilson coefficients of the theory. The missing contributions to the cross section for top-antitop production in the resonance region at next-to-next-to-leading logarithmic (NNLL) level are the so-called mixing contributions to the NNLL anomalous dimension of the S-wave production/annihilation current of the top quark pair. To calculate these one has to know the next-to-leading logarithmic (NLL) renormalization group running of so-called potentials (four-quark operators). The dominant contributions to the anomalous dimension of these potentials come from vNRQCD diagrams with ultrasoft gluon loops. The aim of this thesis is to derive the complete ultrasoft NLL running of the relevant potentials. Technical and conceptional issues are discussed and preliminary results are analyzed with regard to the consequences for the mentioned cross section and its theoretical uncertainty. | Format: Paperback | 172 pp. Bookseller Inventory # K9783838109756

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Book Description Südwestdeutscher Verlag Für Hochschulschriften AG Co. KG Sep 2015, 2015. Taschenbuch. Book Condition: Neu. Neuware - The effective field theory vNRQCD allows to describe among others the production of top-antitop pairs in electron-positron collisions at threshold, i.e. with very small relative velocity of the quarks. Potentially large logarithms of the velocity are systematically summed up and lead to a scale dependence of the Wilson coefficients of the theory. The missing contributions to the cross section for top-antitop production in the resonance region at next-to-next-to-leading logarithmic (NNLL) level are the so-called mixing contributions to the NNLL anomalous dimension of the S-wave production/annihilation current of the top quark pair. To calculate these one has to know the next-to-leading logarithmic (NLL) renormalization group running of so-called potentials (four-quark operators). The dominant contributions to the anomalous dimension of these potentials come from vNRQCD diagrams with ultrasoft gluon loops. The aim of this thesis is to derive the complete ultrasoft NLL running of the relevant potentials. Technical and conceptional issues are discussed and preliminary results are analyzed with regard to the consequences for the mentioned cross section and its theoretical uncertainty. 172 pp. Deutsch. Bookseller Inventory # 9783838109756

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Book Description Südwestdeutscher Verlag Für Hochschulschriften AG Co. KG Sep 2015, 2015. Taschenbuch. Book Condition: Neu. Neuware - The effective field theory vNRQCD allows to describe among others the production of top-antitop pairs in electron-positron collisions at threshold, i.e. with very small relative velocity of the quarks. Potentially large logarithms of the velocity are systematically summed up and lead to a scale dependence of the Wilson coefficients of the theory. The missing contributions to the cross section for top-antitop production in the resonance region at next-to-next-to-leading logarithmic (NNLL) level are the so-called mixing contributions to the NNLL anomalous dimension of the S-wave production/annihilation current of the top quark pair. To calculate these one has to know the next-to-leading logarithmic (NLL) renormalization group running of so-called potentials (four-quark operators). The dominant contributions to the anomalous dimension of these potentials come from vNRQCD diagrams with ultrasoft gluon loops. The aim of this thesis is to derive the complete ultrasoft NLL running of the relevant potentials. Technical and conceptional issues are discussed and preliminary results are analyzed with regard to the consequences for the mentioned cross section and its theoretical uncertainty. 172 pp. Deutsch. Bookseller Inventory # 9783838109756

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Book Description Südwestdeutscher Verlag Für Hochschulschriften AG Co. KG Sep 2015, 2015. Taschenbuch. Book Condition: Neu. This item is printed on demand - Print on Demand Neuware - The effective field theory vNRQCD allows to describe among others the production of top-antitop pairs in electron-positron collisions at threshold, i.e. with very small relative velocity of the quarks. Potentially large logarithms of the velocity are systematically summed up and lead to a scale dependence of the Wilson coefficients of the theory. The missing contributions to the cross section for top-antitop production in the resonance region at next-to-next-to-leading logarithmic (NNLL) level are the so-called mixing contributions to the NNLL anomalous dimension of the S-wave production/annihilation current of the top quark pair. To calculate these one has to know the next-to-leading logarithmic (NLL) renormalization group running of so-called potentials (four-quark operators). The dominant contributions to the anomalous dimension of these potentials come from vNRQCD diagrams with ultrasoft gluon loops. The aim of this thesis is to derive the complete ultrasoft NLL running of the relevant potentials. Technical and conceptional issues are discussed and preliminary results are analyzed with regard to the consequences for the mentioned cross section and its theoretical uncertainty. 172 pp. Deutsch. Bookseller Inventory # 9783838109756

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Book Description Südwestdeutscher Verlag, Russian Federation, 2012. Paperback. Book Condition: New. Language: German . Brand New Book. The effective field theory vNRQCD allows to describe among others the production of top-antitop pairs in electron-positron collisions at threshold, i.e. with very small relative velocity of the quarks. Potentially large logarithms of the velocity are systematically summed up and lead to a scale dependence of the Wilson coefficients of the theory. The missing contributions to the cross section for top-antitop production in the resonance region at next-to-next-to-leading logarithmic (NNLL) level are the so-called mixing contributions to the NNLL anomalous dimension of the S-wave production/annihilation current of the top quark pair. To calculate these one has to know the next-to-leading logarithmic (NLL) renormalization group running of so-called potentials (four-quark operators). The dominant contributions to the anomalous dimension of these potentials come from vNRQCD diagrams with ultrasoft gluon loops. The aim of this thesis is to derive the complete ultrasoft NLL running of the relevant potentials. Technical and conceptional issues are discussed and preliminary results are analyzed with regard to the consequences for the mentioned cross section and its theoretical uncertainty. This book was created using print-on-demand technology. Bookseller Inventory # KNV9783838109756

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