Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z

A novel method to extract the QCD coupling alpha_s from the energy evolution of the moments of the parton-to-hadron fragmentation functions at low fractional hadron momentum z, is presented. The evolution of the moments (multiplicity, peak, width, skewness) of the charged-hadron distribution in jets...

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Detalles Bibliográficos
Autores principales: d'Enterria, David, Perez-Ramos, Redamy
Lenguaje:eng
Publicado: 2014
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/1750094
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author d'Enterria, David
Perez-Ramos, Redamy
author_facet d'Enterria, David
Perez-Ramos, Redamy
author_sort d'Enterria, David
collection CERN
description A novel method to extract the QCD coupling alpha_s from the energy evolution of the moments of the parton-to-hadron fragmentation functions at low fractional hadron momentum z, is presented. The evolution of the moments (multiplicity, peak, width, skewness) of the charged-hadron distribution in jets is computed at NMLLA+NLO* accuracy and compared to the experimental deep-inelastic e-p data. Values of the strong coupling constant at the Z pole are obtained, alpha_s(m_Z) = 0.119 +/- 0.010, in excellent numerical agreement with the current world average determined using other methods at the same level of accuracy.
id cern-1750094
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-17500942021-05-03T20:23:03Zhttp://cds.cern.ch/record/1750094engd'Enterria, DavidPerez-Ramos, RedamyExtraction of alpha_s from the energy evolution of jet fragmentation functions at low zParticle Physics - PhenomenologyA novel method to extract the QCD coupling alpha_s from the energy evolution of the moments of the parton-to-hadron fragmentation functions at low fractional hadron momentum z, is presented. The evolution of the moments (multiplicity, peak, width, skewness) of the charged-hadron distribution in jets is computed at NMLLA+NLO* accuracy and compared to the experimental deep-inelastic e-p data. Values of the strong coupling constant at the Z pole are obtained, alpha_s(m_Z) = 0.119 +/- 0.010, in excellent numerical agreement with the current world average determined using other methods at the same level of accuracy.A novel method to extract the QCD coupling alpha_s from the energy evolution of the moments of the parton-to-hadron fragmentation functions at low fractional hadron momentum z, is presented. The evolution of the moments (multiplicity, peak, width, skewness) of the charged-hadron distribution in jets is computed at NMLLA+NLO* accuracy and compared to the experimental deep-inelastic e-p data. Values of the strong coupling constant at the Z pole are obtained, alpha_s(m_Z) = 0.119 +/- 0.010, in excellent numerical agreement with the current world average determined using other methods at the same level of accuracy.arXiv:1408.2865oai:cds.cern.ch:17500942014-08-12
spellingShingle Particle Physics - Phenomenology
d'Enterria, David
Perez-Ramos, Redamy
Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z
title Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z
title_full Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z
title_fullStr Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z
title_full_unstemmed Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z
title_short Extraction of alpha_s from the energy evolution of jet fragmentation functions at low z
title_sort extraction of alpha_s from the energy evolution of jet fragmentation functions at low z
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/1750094
work_keys_str_mv AT denterriadavid extractionofalphasfromtheenergyevolutionofjetfragmentationfunctionsatlowz
AT perezramosredamy extractionofalphasfromtheenergyevolutionofjetfragmentationfunctionsatlowz

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