Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEP
Hadronic events from the data collected with the DELPHI detector at LEP within the energy range from 89 GeV to 209 GeV are selected, their jet rates are determined and compared to predictions of four different event generators. One of them is the recently developed APACIC++ generator which performs...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Format: | Journal article |
Language: | English |
Published: |
2005
|
_version_ | 1797088256973602816 |
---|---|
author | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alderweireld, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, E Augustinus, A Baillon, P Ballestrero, A |
author_facet | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alderweireld, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, E Augustinus, A Baillon, P Ballestrero, A |
author_sort | Abdallah, J |
collection | OXFORD |
description | Hadronic events from the data collected with the DELPHI detector at LEP within the energy range from 89 GeV to 209 GeV are selected, their jet rates are determined and compared to predictions of four different event generators. One of them is the recently developed APACIC++ generator which performs a massive matrix element calculation matched to a parton shower followed by string fragmentation. The four-jet rate is used to measure αs in the next-to-leading-order approximation yielding αs(M Z2) = 0.1175 ± 0.0030. The running of αs determined by using four-jet events has been tested. The logarithmic energy slope is measured to be dαs-1/d log Ecm = 1.14 ± 0.36. Since the analysis is based on four-jet final states it represents an alternative approach to previous DELPHI αs a measurements using event shape distributions. © Springer-Verlag/Società Italiana di Fisica 2004. |
first_indexed | 2024-03-07T02:47:25Z |
format | Journal article |
id | oxford-uuid:ac805e4a-255f-4039-a707-bdb3279587a7 |
institution | University of Oxford |
language | English |
last_indexed | 2024-03-07T02:47:25Z |
publishDate | 2005 |
record_format | dspace |
spelling | oxford-uuid:ac805e4a-255f-4039-a707-bdb3279587a72022-03-27T03:29:30ZMeasurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEPJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ac805e4a-255f-4039-a707-bdb3279587a7EnglishSymplectic Elements at Oxford2005Abdallah, JAbreu, PAdam, WAdzic, PAlbrecht, TAlderweireld, TAlemany-Fernandez, RAllmendinger, TAllport, PAmaldi, UAmapane, NAmato, SAnashkin, EAndreazza, AAndringa, SAnjos, NAntilogus, PApel, WArnoud, YAsk, SAsman, BAugustin, EAugustinus, ABaillon, PBallestrero, AHadronic events from the data collected with the DELPHI detector at LEP within the energy range from 89 GeV to 209 GeV are selected, their jet rates are determined and compared to predictions of four different event generators. One of them is the recently developed APACIC++ generator which performs a massive matrix element calculation matched to a parton shower followed by string fragmentation. The four-jet rate is used to measure αs in the next-to-leading-order approximation yielding αs(M Z2) = 0.1175 ± 0.0030. The running of αs determined by using four-jet events has been tested. The logarithmic energy slope is measured to be dαs-1/d log Ecm = 1.14 ± 0.36. Since the analysis is based on four-jet final states it represents an alternative approach to previous DELPHI αs a measurements using event shape distributions. © Springer-Verlag/Società Italiana di Fisica 2004. |
spellingShingle | Abdallah, J Abreu, P Adam, W Adzic, P Albrecht, T Alderweireld, T Alemany-Fernandez, R Allmendinger, T Allport, P Amaldi, U Amapane, N Amato, S Anashkin, E Andreazza, A Andringa, S Anjos, N Antilogus, P Apel, W Arnoud, Y Ask, S Asman, B Augustin, E Augustinus, A Baillon, P Ballestrero, A Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEP |
title | Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEP |
title_full | Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEP |
title_fullStr | Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEP |
title_full_unstemmed | Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEP |
title_short | Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha(s) from the four-jet rate with the DELPHI detector at LEP |
title_sort | measurement of the energy dependence of hadronic jet rates and the strong coupling alpha s from the four jet rate with the delphi detector at lep |
work_keys_str_mv | AT abdallahj measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT abreup measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT adamw measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT adzicp measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT albrechtt measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT alderweireldt measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT alemanyfernandezr measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT allmendingert measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT allportp measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT amaldiu measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT amapanen measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT amatos measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT anashkine measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT andreazzaa measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT andringas measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT anjosn measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT antilogusp measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT apelw measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT arnoudy measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT asks measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT asmanb measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT augustine measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT augustinusa measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT baillonp measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep AT ballestreroa measurementoftheenergydependenceofhadronicjetratesandthestrongcouplingalphasfromthefourjetratewiththedelphidetectoratlep |