Multiparticle correlations and higher order harmonics in pPbcollisions at√sNN=8.16 TeV

• Main Authors: Wang, Quan, Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Md. Ali, Mohd. Adli
• Format: Article
• Language: English; English; English
• Published: Elsevier B.V. 2019
• Subjects: Q Science (General); QC Physics
• Online Access: http://irep.iium.edu.my/71934/1/71934_Multiparticle%20correlations%20and%20higher_article.pdf; http://irep.iium.edu.my/71934/2/71934_Multiparticle%20correlations%20and%20higher_wos.pdf; http://irep.iium.edu.my/71934/3/71934_Multiparticle%20correlations%20and%20higher_scopus.pdf; http://irep.iium.edu.my/71934/; https://reader.elsevier.com/reader/sd/pii/S0375947418302525?token=04A1123849287AB84E6BA7BEE40BF4C21DA8344D5D05FC31BCD0861BEBB46B269E0AF8D6050F0398CA09098906583224
• Institution: Universiti Islam Antarabangsa Malaysia

The elliptic and higher-order azimuthal anisotropy Fourier harmonics (v n ) are obtained for pPb collisions at s NN =8.16TeV over a wide range of event multiplicities based on multiparticle correlations. The data were collected by the CMS experiment during the 2016 LHC run. A sample of peripheral PbPb collisions at s NN =5.02TeV covering a similar range of event multiplicities to the pPb results is also analyzed for comparison. The ratios of different harmonic moments are obtained for both v 2 and v 3 with high precision, which allows a direct comparison to theoretical predictions assuming a hydrodynamic evolution of the created medium with initial-state density fluctuations, particularly probing the non-Gaussian nature of initial-state fluctuations in small collision systems. The presented results provide crucial insights into the origin of collective long-range correlations observed in small collision systems.