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Publikācija: Azimuthal Anisotropy of Charged Particles with Transverse Momentum up to 100GeV/c in PbPb Collisions at √sNN = 5.02 TeV

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Nosaukums oriģinālvalodā Azimuthal Anisotropy of Charged Particles with Transverse Momentum up to 100GeV/c in PbPb Collisions at √sNN = 5.02 TeV
Pētniecības nozare 1. Dabaszinātnes
Pētniecības apakšnozare 1.3. Fizika un astronomija
Autori Viesturs Veckalns
CERN international group of authors
Atslēgas vārdi CMS, Flow, High-p T, Jet quenching, Parton energy loss, QGP
Anotācija The Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sNN=5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 1<pT<100 GeV/c. The analysis focuses on the pT>10 GeV/c range, where anisotropic azimuthal distributions should reflect the path-length dependence of parton energy loss in the created medium. Results are presented in several bins of PbPb collision centrality, spanning the 60% most central events. The v2 coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to initial-state fluctuations. The values from both methods remain positive up to pT∼60–80 GeV/c, in all examined centrality classes. The v3 coefficient, only measured with the scalar product method, tends to zero for pT≳20 GeV/c. Comparisons between theoretical calculations and data provide new constraints on the path-length dependence of parton energy loss in heavy ion collisions and highlight the importance of the initial-state fluctuations.
DOI: 10.1016/j.physletb.2017.11.041
Hipersaite: https://www.sciencedirect.com/science/article/pii/S0370269317309334?via%3Dihub 
Atsauce Veckalns, V., international group of authors, C. Azimuthal Anisotropy of Charged Particles with Transverse Momentum up to 100GeV/c in PbPb Collisions at √sNN = 5.02 TeV. Physics Letters B, 2018, Vol.776, 195.-216.lpp. ISSN 0370-2693. Pieejams: doi:10.1016/j.physletb.2017.11.041
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