Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization
We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 3...
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2004
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v70_n1_p012002_Adeva http://hdl.handle.net/20.500.12110/paper_05562821_v70_n1_p012002_Adeva |
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paper:paper_05562821_v70_n1_p012002_Adeva2023-06-08T15:42:33Z Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization ammonia butanol article artificial neural network energy gluon hadron lepton Monte Carlo method muon nucleon photon polarimeter polarization quark spectrometer We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 30%. The most effective one, based on a neural network approach, provides the asymmetries ApℓN→ℓhhX=0.030±0.057(stat)±0. 010(syst) and AdℓN→ℓhhX=0.070±0. 076(stat)±0.010(syst). From these values we derive an averaged gluon polarization ΔG/G=-0.20±0.28(stat)±0.10(syst) at an average fraction of nucleon momentum carried by gluons 〈η〉 = 0.07. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v70_n1_p012002_Adeva http://hdl.handle.net/20.500.12110/paper_05562821_v70_n1_p012002_Adeva |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
ammonia butanol article artificial neural network energy gluon hadron lepton Monte Carlo method muon nucleon photon polarimeter polarization quark spectrometer |
| spellingShingle |
ammonia butanol article artificial neural network energy gluon hadron lepton Monte Carlo method muon nucleon photon polarimeter polarization quark spectrometer Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization |
| topic_facet |
ammonia butanol article artificial neural network energy gluon hadron lepton Monte Carlo method muon nucleon photon polarimeter polarization quark spectrometer |
| description |
We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 30%. The most effective one, based on a neural network approach, provides the asymmetries ApℓN→ℓhhX=0.030±0.057(stat)±0. 010(syst) and AdℓN→ℓhhX=0.070±0. 076(stat)±0.010(syst). From these values we derive an averaged gluon polarization ΔG/G=-0.20±0.28(stat)±0.10(syst) at an average fraction of nucleon momentum carried by gluons 〈η〉 = 0.07. |
| title |
Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization |
| title_short |
Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization |
| title_full |
Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization |
| title_fullStr |
Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization |
| title_full_unstemmed |
Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization |
| title_sort |
spin asymmetries for events with high pt hadrons in dis and an evaluation of the gluon polarization |
| publishDate |
2004 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v70_n1_p012002_Adeva http://hdl.handle.net/20.500.12110/paper_05562821_v70_n1_p012002_Adeva |
| _version_ |
1768541757129097216 |