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Observation of single-top-quark production in association with a photon at the ATLAS detector
This note reports the observation of single top quarks produced together with a photon using 139 fb$^{−1}$ of data collected with the ATLAS detector in 13 TeV proton–proton collisions at the Large Hadron Collider. The analysis uses the presence of a forward jet, characteristic of $t$-channel product...
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| Lenguaje: | eng |
| Publicado: |
2022
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| Acceso en línea: | http://cds.cern.ch/record/2805217 |
| _version_ | 1780972916202012672 |
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| author | The ATLAS collaboration |
| author_facet | The ATLAS collaboration |
| author_sort | The ATLAS collaboration |
| collection | CERN |
| description | This note reports the observation of single top quarks produced together with a photon using 139 fb$^{−1}$ of data collected with the ATLAS detector in 13 TeV proton–proton collisions at the Large Hadron Collider. The analysis uses the presence of a forward jet, characteristic of $t$-channel production, and separates the signal from the background with neural networks. Requiring a photon with transverse momentum larger than 20 GeV and within the acceptance, the fiducial cross section is measured to be 580 ± 19 (stat.) ± 63 (syst.) fb, compared to the Standard Model prediction of 406 $^{+25}_{-32}$ fb. |
| id | cern-2805217 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2022 |
| record_format | invenio |
| spelling | cern-28052172023-02-02T18:34:38Zhttp://cds.cern.ch/record/2805217engThe ATLAS collaborationObservation of single-top-quark production in association with a photon at the ATLAS detectorParticle Physics - ExperimentThis note reports the observation of single top quarks produced together with a photon using 139 fb$^{−1}$ of data collected with the ATLAS detector in 13 TeV proton–proton collisions at the Large Hadron Collider. The analysis uses the presence of a forward jet, characteristic of $t$-channel production, and separates the signal from the background with neural networks. Requiring a photon with transverse momentum larger than 20 GeV and within the acceptance, the fiducial cross section is measured to be 580 ± 19 (stat.) ± 63 (syst.) fb, compared to the Standard Model prediction of 406 $^{+25}_{-32}$ fb.ATLAS-CONF-2022-013oai:cds.cern.ch:28052172022-03-29 |
| spellingShingle | Particle Physics - Experiment The ATLAS collaboration Observation of single-top-quark production in association with a photon at the ATLAS detector |
| title | Observation of single-top-quark production in association with a photon at the ATLAS detector |
| title_full | Observation of single-top-quark production in association with a photon at the ATLAS detector |
| title_fullStr | Observation of single-top-quark production in association with a photon at the ATLAS detector |
| title_full_unstemmed | Observation of single-top-quark production in association with a photon at the ATLAS detector |
| title_short | Observation of single-top-quark production in association with a photon at the ATLAS detector |
| title_sort | observation of single-top-quark production in association with a photon at the atlas detector |
| topic | Particle Physics - Experiment |
| url | http://cds.cern.ch/record/2805217 |
| work_keys_str_mv | AT theatlascollaboration observationofsingletopquarkproductioninassociationwithaphotonattheatlasdetector |