Energy dependence of event shapes and of alpha(s) at LEP 2
Infrared and collinear safe event shape distributions and their mean values are determined using the data taken at five different centre of mass energies above MZ with the DELPHI detector at LEP. From the event shapes, the strong coupling αS is extracted in θ(αS2), NLLA and a combined scheme using h...
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| Formaat: | Journal article |
| Taal: | English |
| Gepubliceerd in: |
1999
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| _version_ | 1826279948696944640 |
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| author | Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z Alderweireld, T Alekseev, G Alemany, R Allmendinger, T Allport, P Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, E Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A Baillon, P |
| author_facet | Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z Alderweireld, T Alekseev, G Alemany, R Allmendinger, T Allport, P Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, E Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A Baillon, P |
| author_sort | Abreu, P |
| collection | OXFORD |
| description | Infrared and collinear safe event shape distributions and their mean values are determined using the data taken at five different centre of mass energies above MZ with the DELPHI detector at LEP. From the event shapes, the strong coupling αS is extracted in θ(αS2), NLLA and a combined scheme using hadronisation corrections evaluated with fragmentation model generators as well as using an analytical power ansatz. Comparing these measurements to those obtained at MZ, the energy dependence (running) of αS is accessible. The logarithmic energy slope of the inverse strong coupling is measured to be d αS-1/d log (Ecm) = 1.39 + 0.34(stat) + 0.17(syst), in good agreement with the QCD expectation of 1.27. © 1999 Published by Elsevier Science B.V. All rights reserved. |
| first_indexed | 2024-03-07T00:06:26Z |
| format | Journal article |
| id | oxford-uuid:77b2c904-b5a4-468c-a466-d80f16dec82b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:06:26Z |
| publishDate | 1999 |
| record_format | dspace |
| spelling | oxford-uuid:77b2c904-b5a4-468c-a466-d80f16dec82b2022-03-26T20:25:53ZEnergy dependence of event shapes and of alpha(s) at LEP 2Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:77b2c904-b5a4-468c-a466-d80f16dec82bEnglishSymplectic Elements at Oxford1999Abreu, PAdam, WAdye, TAdzic, PAlbrecht, ZAlderweireld, TAlekseev, GAlemany, RAllmendinger, TAllport, PAlmehed, SAmaldi, UAmapane, NAmato, SAnassontzis, EAndersson, PAndreazza, AAndringa, SAntilogus, PApel, WArnoud, YAsman, BAugustin, JAugustinus, ABaillon, PInfrared and collinear safe event shape distributions and their mean values are determined using the data taken at five different centre of mass energies above MZ with the DELPHI detector at LEP. From the event shapes, the strong coupling αS is extracted in θ(αS2), NLLA and a combined scheme using hadronisation corrections evaluated with fragmentation model generators as well as using an analytical power ansatz. Comparing these measurements to those obtained at MZ, the energy dependence (running) of αS is accessible. The logarithmic energy slope of the inverse strong coupling is measured to be d αS-1/d log (Ecm) = 1.39 + 0.34(stat) + 0.17(syst), in good agreement with the QCD expectation of 1.27. © 1999 Published by Elsevier Science B.V. All rights reserved. |
| spellingShingle | Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z Alderweireld, T Alekseev, G Alemany, R Allmendinger, T Allport, P Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, E Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A Baillon, P Energy dependence of event shapes and of alpha(s) at LEP 2 |
| title | Energy dependence of event shapes and of alpha(s) at LEP 2 |
| title_full | Energy dependence of event shapes and of alpha(s) at LEP 2 |
| title_fullStr | Energy dependence of event shapes and of alpha(s) at LEP 2 |
| title_full_unstemmed | Energy dependence of event shapes and of alpha(s) at LEP 2 |
| title_short | Energy dependence of event shapes and of alpha(s) at LEP 2 |
| title_sort | energy dependence of event shapes and of alpha s at lep 2 |
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