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$\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$
The QCD coupling $\alpha_s$ is extracted from the energy evolution of the first two moments (multiplicity and mean) of the parton-to-hadron fragmentation functions at low fractional hadron momentum $z$. Comparisons of the experimental $e^+e^-$ and deep-inelastic $e^\pm$p jet data to our NNLO$^*$+NNL...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
2015
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/2015664 |
| _version_ | 1780946688376045568 |
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| author | d'Enterria, David Pérez-Ramos, Redamy |
| author_facet | d'Enterria, David Pérez-Ramos, Redamy |
| author_sort | d'Enterria, David |
| collection | CERN |
| description | The QCD coupling $\alpha_s$ is extracted from the energy evolution of the first two moments (multiplicity and mean) of the parton-to-hadron fragmentation functions at low fractional hadron momentum $z$. Comparisons of the experimental $e^+e^-$ and deep-inelastic $e^\pm$p jet data to our NNLO$^*$+NNLL predictions, allow us to obtain $\alpha_s(m_{_{\rm Z}})$ = 0.1205$\pm$0.0010$^{+0.0022}_{-0.0000}$, in excellent agreement with the current world average determined using other methods at the same level of accuracy. |
| id | cern-2015664 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2015 |
| record_format | invenio |
| spelling | cern-20156642021-05-03T20:01:56Zhttp://cds.cern.ch/record/2015664engd'Enterria, DavidPérez-Ramos, Redamy$\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$Particle Physics - PhenomenologyParticle Physics - Experimenthep-phParticle Physics - PhenomenologyThe QCD coupling $\alpha_s$ is extracted from the energy evolution of the first two moments (multiplicity and mean) of the parton-to-hadron fragmentation functions at low fractional hadron momentum $z$. Comparisons of the experimental $e^+e^-$ and deep-inelastic $e^\pm$p jet data to our NNLO$^*$+NNLL predictions, allow us to obtain $\alpha_s(m_{_{\rm Z}})$ = 0.1205$\pm$0.0010$^{+0.0022}_{-0.0000}$, in excellent agreement with the current world average determined using other methods at the same level of accuracy.The QCD coupling $\alpha_s$ is extracted from the energy evolution of the first two moments (multiplicity and mean) of the parton-to-hadron fragmentation functions at low fractional hadron momentum $z$. Comparisons of the experimental $e^+e^-$ and deep-inelastic $e^\pm$p jet data to our NNLO$^*$+NNLL predictions, allow us to obtain $\alpha_s(m_{_{\rm Z}})$ = 0.1205$\pm$0.0010$^{+0.0022}_{-0.0000}$, in excellent agreement with the current world average determined using other methods at the same level of accuracy.arXiv:1505.02624oai:cds.cern.ch:20156642015-05-11 |
| spellingShingle | Particle Physics - Phenomenology Particle Physics - Experiment hep-ph Particle Physics - Phenomenology d'Enterria, David Pérez-Ramos, Redamy $\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$ |
| title | $\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$ |
| title_full | $\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$ |
| title_fullStr | $\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$ |
| title_full_unstemmed | $\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$ |
| title_short | $\alpha_s$ determination at NNLO$^\star$+NNLL accuracy from the energy evolution of jet fragmentation functions at low $z$ |
| title_sort | $\alpha_s$ determination at nnlo$^\star$+nnll accuracy from the energy evolution of jet fragmentation functions at low $z$ |
| topic | Particle Physics - Phenomenology Particle Physics - Experiment hep-ph Particle Physics - Phenomenology |
| url | http://cds.cern.ch/record/2015664 |
| work_keys_str_mv | AT denterriadavid alphasdeterminationatnnlostarnnllaccuracyfromtheenergyevolutionofjetfragmentationfunctionsatlowz AT perezramosredamy alphasdeterminationatnnlostarnnllaccuracyfromtheenergyevolutionofjetfragmentationfunctionsatlowz |