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Article: Measurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at √s = 8 and 13 TeV

TitleMeasurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at √s = 8 and 13 TeV
Authors
Issue Date2020
PublisherSpringer Verlag (Germany): SCOAP3. The Journal's web site is located at http://epjc.edpsciences.org
Citation
The European Physical Journal C: Particles and Fields, 2020, v. 80 n. 1, article no. 64 How to Cite?
AbstractResults are presented from the measurement by ATLAS of long-range (|Δη|>2) dihadron angular correlations in √s=8 and 13 TeV pp collisions containing a Z boson. The analysis is performed using 19.4 fb−1 of √s=8 TeV data recorded during Run 1 of the LHC and 36.1 fb−1 of √s=13 TeV data recorded during Run 2. Two-particle correlation functions are measured as a function of relative azimuthal angle over the relative pseudorapidity range 2<|Δη|<5 for different intervals of charged-particle multiplicity and transverse momentum. The measurements are corrected for the presence of background charged particles generated by collisions that occur during one passage of two colliding proton bunches in the LHC. Contributions to the two-particle correlation functions from hard processes are removed using a template-fitting procedure. Sinusoidal modulation in the correlation functions is observed and quantified by the second Fourier coefficient of the correlation function, v2,2, which in turn is used to obtain the single-particle anisotropy coefficient v2. The v2 values in the Z-tagged events, integrated over 0.5
Persistent Identifierhttp://hdl.handle.net/10722/286273
ISSN
2020 Impact Factor: 4.59
2020 SCImago Journal Rankings: 1.938
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorATLAS Collaboration-
dc.contributor.authorLo, CY-
dc.contributor.authorParedes Hernandez, DK-
dc.contributor.authorTu, Y-
dc.date.accessioned2020-08-31T07:01:36Z-
dc.date.available2020-08-31T07:01:36Z-
dc.date.issued2020-
dc.identifier.citationThe European Physical Journal C: Particles and Fields, 2020, v. 80 n. 1, article no. 64-
dc.identifier.issn1434-6044-
dc.identifier.urihttp://hdl.handle.net/10722/286273-
dc.description.abstractResults are presented from the measurement by ATLAS of long-range (|Δη|>2) dihadron angular correlations in √s=8 and 13 TeV pp collisions containing a Z boson. The analysis is performed using 19.4 fb−1 of √s=8 TeV data recorded during Run 1 of the LHC and 36.1 fb−1 of √s=13 TeV data recorded during Run 2. Two-particle correlation functions are measured as a function of relative azimuthal angle over the relative pseudorapidity range 2<|Δη|<5 for different intervals of charged-particle multiplicity and transverse momentum. The measurements are corrected for the presence of background charged particles generated by collisions that occur during one passage of two colliding proton bunches in the LHC. Contributions to the two-particle correlation functions from hard processes are removed using a template-fitting procedure. Sinusoidal modulation in the correlation functions is observed and quantified by the second Fourier coefficient of the correlation function, v2,2, which in turn is used to obtain the single-particle anisotropy coefficient v2. The v2 values in the Z-tagged events, integrated over 0.5<pT<5 GeV, are found to be independent of multiplicity and √s, and consistent within uncertainties with previous measurements in inclusive pp collisions. As a function of charged-particle pT, the Z-tagged and inclusive v2 values are consistent within uncertainties for pT<3 GeV.-
dc.languageeng-
dc.publisherSpringer Verlag (Germany): SCOAP3. The Journal's web site is located at http://epjc.edpsciences.org-
dc.relation.ispartofThe European Physical Journal C: Particles and Fields-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleMeasurement of long-range two-particle azimuthal correlations in Z-boson tagged pp collisions at √s = 8 and 13 TeV-
dc.typeArticle-
dc.identifier.emailLo, CY: samuel3@hku.hk-
dc.identifier.emailParedes Hernandez, DK: dparedes@hku.hk-
dc.identifier.emailTu, Y: yanjuntu@hku.hk-
dc.identifier.authorityTu, Y=rp01971-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1140/epjc/s10052-020-7606-6-
dc.identifier.scopuseid_2-s2.0-85078365024-
dc.identifier.hkuros313268-
dc.identifier.volume80-
dc.identifier.issue1-
dc.identifier.spagearticle no. 64-
dc.identifier.epagearticle no. 64-
dc.identifier.isiWOS:000521222100003-
dc.publisher.placeGermany-
dc.identifier.issnl1434-6044-

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