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Article: Measurement of the tt¯tt¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector
Title | Measurement of the tt¯tt¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector |
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Authors | |
Keywords | Hadron-Hadron scattering (experiments) Top physics |
Issue Date | 2021 |
Publisher | Springer Verlag: SCOAP3. The Journal's web site is located at http://www.springer.com/physics/particle+and+nuclear+physics/journal/13130 |
Citation | Journal of High Energy Physics, 2021, v. 2021 n. 11, article no. 118 How to Cite? |
Abstract | A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb−1 is presented. Events are selected if they contain a single lepton (electron or muon) or an opposite-sign lepton pair, in association with multiple jets. The events are categorised according to the number of jets and how likely these are to contain b-hadrons. A multivariate technique is then used to discriminate between signal and background events. The measured four-top-quark production cross section is found to be 26+17−15 fb, with a corresponding observed (expected) significance of 1.9 (1.0) standard deviations over the background-only hypothesis. The result is combined with the previous measurement performed by the ATLAS Collaboration in the multilepton final state. The combined four-top-quark production cross section is measured to be 24+7−6 fb, with a corresponding observed (expected) signal significance of 4.7 (2.6) standard deviations over the background-only predictions. It is consistent within 2.0 standard deviations with the Standard Model expectation of 12.0 ± 2.4 fb. |
Persistent Identifier | http://hdl.handle.net/10722/309114 |
ISSN | 2023 Impact Factor: 5.0 2023 SCImago Journal Rankings: 0.832 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | The ATLAS collaboration | - |
dc.contributor.author | Paredes Hernandez, D | - |
dc.contributor.author | Peng, C | - |
dc.contributor.author | Tam, KC | - |
dc.contributor.author | Tu, Y | - |
dc.contributor.author | Pizzimento, L | - |
dc.date.accessioned | 2021-12-14T01:40:45Z | - |
dc.date.available | 2021-12-14T01:40:45Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Journal of High Energy Physics, 2021, v. 2021 n. 11, article no. 118 | - |
dc.identifier.issn | 1029-8479 | - |
dc.identifier.uri | http://hdl.handle.net/10722/309114 | - |
dc.description.abstract | A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb−1 is presented. Events are selected if they contain a single lepton (electron or muon) or an opposite-sign lepton pair, in association with multiple jets. The events are categorised according to the number of jets and how likely these are to contain b-hadrons. A multivariate technique is then used to discriminate between signal and background events. The measured four-top-quark production cross section is found to be 26+17−15 fb, with a corresponding observed (expected) significance of 1.9 (1.0) standard deviations over the background-only hypothesis. The result is combined with the previous measurement performed by the ATLAS Collaboration in the multilepton final state. The combined four-top-quark production cross section is measured to be 24+7−6 fb, with a corresponding observed (expected) signal significance of 4.7 (2.6) standard deviations over the background-only predictions. It is consistent within 2.0 standard deviations with the Standard Model expectation of 12.0 ± 2.4 fb. | - |
dc.language | eng | - |
dc.publisher | Springer Verlag: SCOAP3. The Journal's web site is located at http://www.springer.com/physics/particle+and+nuclear+physics/journal/13130 | - |
dc.relation.ispartof | Journal of High Energy Physics | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Hadron-Hadron scattering (experiments) | - |
dc.subject | Top physics | - |
dc.title | Measurement of the tt¯tt¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector | - |
dc.type | Article | - |
dc.identifier.email | Paredes Hernandez, D: dparedes@hku.hk | - |
dc.identifier.email | Peng, C: samp0808@hku.hk | - |
dc.identifier.email | Tu, Y: yanjuntu@hku.hk | - |
dc.identifier.authority | Tu, Y=rp01971 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1007/JHEP11(2021)118 | - |
dc.identifier.scopus | eid_2-s2.0-85120070331 | - |
dc.identifier.hkuros | 331001 | - |
dc.identifier.volume | 2021 | - |
dc.identifier.issue | 11 | - |
dc.identifier.spage | article no. 118 | - |
dc.identifier.epage | article no. 118 | - |
dc.identifier.isi | WOS:000722987000001 | - |
dc.publisher.place | Germany | - |