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1811091174917668864
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MIT
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| description |
A measurement of the underlying activity in events with a jet of transverse momentum in the several GeV region is performed in proton-proton collisions at √ s = 0:9 and 7TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity |η|<2 and transverse momentum pT >0:5 GeV/c is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. A significant growth of the average multiplicity and scalar-pT sum of the particles in the transverse region is observed with increasing pT of the leading trackjet, followed by a much slower rise above a few GeV/c. For track-jet pT larger than a few GeV/c, the activity in the transverse region is approximately doubled with a centreof- mass energy increase from 0:9 to 7TeV. Predictions of several QCD-inspired models as implemented in pythia are compared to the data.
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2024-09-23T14:58:07Z
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Article
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mit-1721.1/133878
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| institution |
Massachusetts Institute of Technology
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| language |
English
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2024-09-23T14:58:07Z
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| publishDate |
2021
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| publisher |
Springer Science and Business Media LLC
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dspace
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| spelling |
mit-1721.1/1338782022-10-01T23:40:20Z Measurement of the underlying event activity at the LHC with √ s = 7 TeV and comparison with √ s = 0.9 TeV A measurement of the underlying activity in events with a jet of transverse momentum in the several GeV region is performed in proton-proton collisions at √ s = 0:9 and 7TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity |η|<2 and transverse momentum pT >0:5 GeV/c is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. A significant growth of the average multiplicity and scalar-pT sum of the particles in the transverse region is observed with increasing pT of the leading trackjet, followed by a much slower rise above a few GeV/c. For track-jet pT larger than a few GeV/c, the activity in the transverse region is approximately doubled with a centreof- mass energy increase from 0:9 to 7TeV. Predictions of several QCD-inspired models as implemented in pythia are compared to the data. 2021-10-27T19:57:05Z 2021-10-27T19:57:05Z 2011 2019-05-15T13:01:10Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/133878 Chatrchyan, S., et al. "Measurement of the Underlying Event Activity at the Lhc with Root S=7 Tev and Comparison with Root S=0.9 Tev." Journal of High Energy Physics 9 (2011). en 10.1007/JHEP09(2011)109 Journal of High Energy Physics Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer Science and Business Media LLC Springer
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| spellingShingle |
Measurement of the underlying event activity at the LHC with √ s = 7 TeV and comparison with √ s = 0.9 TeV
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| title |
Measurement of the underlying event activity at the LHC with √ s = 7 TeV and comparison with √ s = 0.9 TeV
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| title_full |
Measurement of the underlying event activity at the LHC with √ s = 7 TeV and comparison with √ s = 0.9 TeV
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| title_fullStr |
Measurement of the underlying event activity at the LHC with √ s = 7 TeV and comparison with √ s = 0.9 TeV
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| title_full_unstemmed |
Measurement of the underlying event activity at the LHC with √ s = 7 TeV and comparison with √ s = 0.9 TeV
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| title_short |
Measurement of the underlying event activity at the LHC with √ s = 7 TeV and comparison with √ s = 0.9 TeV
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| title_sort |
measurement of the underlying event activity at the lhc with √ s 7 tev and comparison with √ s 0 9 tev
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| url |
https://hdl.handle.net/1721.1/133878
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