Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector
Distributions of transverse momentum p[subscript T][superscript ℓℓ] and the related angular variable ϕ[subscript η]* of Drell–Yan lepton pairs are measured in 20.3fb ⁻¹ of proton–proton collisions at √ s = 8 TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final st...
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Springer Berlin Heidelberg
2018
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| Online Access: | http://hdl.handle.net/1721.1/117331 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1826216735633571840 |
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| author | ATLAS Collaboration Taylor, Frank E |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics ATLAS Collaboration Taylor, Frank E |
| author_sort | ATLAS Collaboration |
| collection | MIT |
| description | Distributions of transverse momentum p[subscript T][superscript ℓℓ] and the related angular variable ϕ[subscript η]* of Drell–Yan lepton pairs are measured in 20.3fb ⁻¹ of proton–proton collisions at √ s = 8 TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects and combined. Compared to previous measurements in proton–proton collisions at √ s = 7 TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the Z-boson mass peak. The data are compared to predictions from perturbative and resummed QCD calculations. For values of ϕ[subscript η]* < 1 the predictions from the Monte Carlo generator ResBos are generally consistent with the data within the theoretical uncertainties. However, at larger values of ϕ[subscript η]* this is not the case. Monte Carlo generators based on the parton-shower approach are unable to describe the data over the full range of p[subscript T][superscript ℓℓ] while the fixed-order prediction of Dynnlo falls below the data at high values of p[subscript T][superscript ℓℓ] . ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the ϕ[subscript η]* and p[subscript T][superscript ℓℓ] distributions as a function of lepton-pair mass and rapidity than the basic shape of the data. |
| first_indexed | 2024-09-23T16:52:16Z |
| format | Article |
| id | mit-1721.1/117331 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:52:16Z |
| publishDate | 2018 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1173312022-10-03T08:50:46Z Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector ATLAS Collaboration Taylor, Frank E Massachusetts Institute of Technology. Department of Physics Taylor, Frank E Distributions of transverse momentum p[subscript T][superscript ℓℓ] and the related angular variable ϕ[subscript η]* of Drell–Yan lepton pairs are measured in 20.3fb ⁻¹ of proton–proton collisions at √ s = 8 TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects and combined. Compared to previous measurements in proton–proton collisions at √ s = 7 TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the Z-boson mass peak. The data are compared to predictions from perturbative and resummed QCD calculations. For values of ϕ[subscript η]* < 1 the predictions from the Monte Carlo generator ResBos are generally consistent with the data within the theoretical uncertainties. However, at larger values of ϕ[subscript η]* this is not the case. Monte Carlo generators based on the parton-shower approach are unable to describe the data over the full range of p[subscript T][superscript ℓℓ] while the fixed-order prediction of Dynnlo falls below the data at high values of p[subscript T][superscript ℓℓ] . ResBos and the parton-shower Monte Carlo generators provide a much better description of the evolution of the ϕ[subscript η]* and p[subscript T][superscript ℓℓ] distributions as a function of lepton-pair mass and rapidity than the basic shape of the data. 2018-08-09T19:51:46Z 2018-08-09T19:51:46Z 2016-05 2015-12 2018-02-09T19:32:25Z Article http://purl.org/eprint/type/JournalArticle 1434-6044 1434-6052 http://hdl.handle.net/1721.1/117331 Aad, G. et al. “Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector.” The European Physical Journal C 76, 5 (May 2016): 291 © 2016 CERN for the benefit of the ATLAS collaboration https://orcid.org/0000-0002-7586-7253 http://dx.doi.org/10.1140/epjc/s10052-016-4070-4 European Physical Journal C: Particles and Fields Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Springer Berlin Heidelberg Springer |
| spellingShingle | ATLAS Collaboration Taylor, Frank E Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector |
| title | Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector |
| title_full | Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector |
| title_fullStr | Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector |
| title_full_unstemmed | Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector |
| title_short | Measurement of the Transverse Momentum and ϕ[subscript η]* Distributions of Drell–Yan Lepton Pairs in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector |
| title_sort | measurement of the transverse momentum and ϕ subscript η distributions of drell yan lepton pairs in proton proton collisions at √s 8 tev with the atlas detector |
| url | http://hdl.handle.net/1721.1/117331 https://orcid.org/0000-0002-7586-7253 |
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