Transverse momentum and process dependent azimuthal anisotropies in root S-NN=8.16 TeV p plus Pb collisions with the ATLAS detectorVisa övriga samt affilieringar
Antal upphovsmän: 29272020 (Engelska)Ingår i: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 80, artikel-id 73Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
The azimuthal anisotropy of charged particles produced in sNN=8.16TeV p+Pb collisions is measured with the ATLAS detector at the LHC. The data correspond to an integrated luminosity of 165 nb-1 that was collected in 2016. Azimuthal anisotropy coefficients, elliptic v2 and triangular v3\, extracted using two-particle correlations with a non-flow template fit procedure, are presented as a function of particle transverse momentum (pT) between 0.5 and 50 GeV. The v2 results are also reported as a function of centrality in three different particle pTintervals. The results are reported from minimum-bias events and jet-triggered events, where two jet pT thresholds are used. The anisotropies for particles with pT less than about 2 GeV are consistent with hydrodynamic flow expectations, while the significant non-zero anisotropies for pT in the range 9-50 GeV are not explained within current theoretical frameworks. In the pTrange 2-9 GeV, the anisotropies are larger in minimum-bias than in jet-triggered events. Possible origins of these effects, such as the changing admixture of particles from hard scattering and the underlying event, are discussed.
Ort, förlag, år, upplaga, sidor
SPRINGER , 2020. Vol. 80, artikel-id 73
Nationell ämneskategori
Subatomär fysik
Identifikatorer
URN: urn:nbn:se:uu:diva-407655DOI: 10.1140/epjc/s10052-020-7624-4ISI: 000513720900001OAI: oai:DiVA.org:uu-407655DiVA, id: diva2:1420648
Forskningsfinansiär
VetenskapsrådetEU, Europeiska forskningsrådetEU, Horisont 2020Wallenbergstiftelserna
Anmärkning
For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-020-7624-4
2020-03-312020-03-312020-03-31Bibliografiskt granskad