Measurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detector
This paper presents a measurement of the top quark pair (tt̄) production charge asymmetry AC using 4.7 fb-1 of proton-proton collisions at a centre-of-mass energy √s = 7TeV collected by the ATLAS detector at the LHC. A tt̄-enriched sample of events with a single lepton (electron or muon), missing tr...
| Glavni autori: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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2014
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| _version_ | 1826296837156372480 |
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| author | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Abulaiti, Y Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adye, T Aefsky, S Agatonovic-Jovin, T Aguilar-Saavedra, J Agustoni, M Ahlen, S |
| author_facet | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Abulaiti, Y Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adye, T Aefsky, S Agatonovic-Jovin, T Aguilar-Saavedra, J Agustoni, M Ahlen, S |
| author_sort | Aad, G |
| collection | OXFORD |
| description | This paper presents a measurement of the top quark pair (tt̄) production charge asymmetry AC using 4.7 fb-1 of proton-proton collisions at a centre-of-mass energy √s = 7TeV collected by the ATLAS detector at the LHC. A tt̄-enriched sample of events with a single lepton (electron or muon), missing transverse momentum and at least four high transverse momentum jets, of which at least one is tagged as coming from a b-quark, is selected. A likelihood fit is used to reconstruct the tt̄ event kinematics. A Bayesian unfolding procedure is employed to estimate AC at the parton-level. The measured value of the tt̄ production charge asymmetry is AC = 0.006 ± 0.010, where the uncertainty includes both the statistical and the systematic components. Differential AC measurements as a function of the invariant mass, the rapidity and the transverse momentum of the tt̄- system are also presented. In addition, AC is measured for a subset of events with large tt̄ velocity, where physics beyond the Standard Model could contribute. All measurements are consistent with the Standard Model predictions. |
| first_indexed | 2024-03-07T04:22:29Z |
| format | Journal article |
| id | oxford-uuid:cb7d99d9-32f6-427c-a9c1-dca2bebc1ab8 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:22:29Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | oxford-uuid:cb7d99d9-32f6-427c-a9c1-dca2bebc1ab82022-03-27T07:15:15ZMeasurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detectorJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:cb7d99d9-32f6-427c-a9c1-dca2bebc1ab8Symplectic Elements at Oxford2014Aad, GAbajyan, TAbbott, BAbdallah, JKhalek, SAAbdinov, OAben, RAbi, BAbolins, MAbouZeid, OAbramowicz, HAbreu, HAbulaiti, YAcharya, BAdamczyk, LAdams, DAddy, TAdelman, JAdomeit, SAdye, TAefsky, SAgatonovic-Jovin, TAguilar-Saavedra, JAgustoni, MAhlen, SThis paper presents a measurement of the top quark pair (tt̄) production charge asymmetry AC using 4.7 fb-1 of proton-proton collisions at a centre-of-mass energy √s = 7TeV collected by the ATLAS detector at the LHC. A tt̄-enriched sample of events with a single lepton (electron or muon), missing transverse momentum and at least four high transverse momentum jets, of which at least one is tagged as coming from a b-quark, is selected. A likelihood fit is used to reconstruct the tt̄ event kinematics. A Bayesian unfolding procedure is employed to estimate AC at the parton-level. The measured value of the tt̄ production charge asymmetry is AC = 0.006 ± 0.010, where the uncertainty includes both the statistical and the systematic components. Differential AC measurements as a function of the invariant mass, the rapidity and the transverse momentum of the tt̄- system are also presented. In addition, AC is measured for a subset of events with large tt̄ velocity, where physics beyond the Standard Model could contribute. All measurements are consistent with the Standard Model predictions. |
| spellingShingle | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Abulaiti, Y Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adye, T Aefsky, S Agatonovic-Jovin, T Aguilar-Saavedra, J Agustoni, M Ahlen, S Measurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detector |
| title | Measurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detector |
| title_full | Measurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detector |
| title_fullStr | Measurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detector |
| title_full_unstemmed | Measurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detector |
| title_short | Measurement of the top quark pair production charge asymmetry in proton-proton collisions at root s=7 TeV using the ATLAS detector |
| title_sort | measurement of the top quark pair production charge asymmetry in proton proton collisions at root s 7 tev using the atlas detector |
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