Elliptic anisotropy at high $p_{\mathrm{T}}$ in pPb collisions using subevent cumulants

CMS Physics Analysis Summaries
Report number	CMS-PAS-HIN-23-002
Title	Elliptic anisotropy at high $p_{\mathrm{T}}$ in pPb collisions using subevent cumulants
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	The second-order (elliptic) Fourier coefficients ($v_{2}$) as a function of particle transverse momentum ($p_\mathrm{T}$) and event multiplicity are presented for pPb collisions using a subevent multiparticle cumulant analysis where nonflow effects are strongly suppressed. The data were recorded by the CMS experiment at a nucleon-nucleon center-of-mass energy of $\sqrt{s_{_{\mathrm{NN}}}} = 8.16$ TeV. The new measurement probes an extended range of particle $p_\mathrm{T}$, up to values where the influence of nonflow effects are shown to strongly influence the results using a standard cumulant analysis. Results for both pPb and PbPb collisions are compared in similar multiplicity ranges, allowing for an assessment of the medium influence on the elliptic anisotropy associated with high $p_\mathrm{T}$ particle production.
Related	superseded by: CERN-EP-2024-332
Email contact: [email protected] Fulltext in PDF Figure_003-a Figure_003-b Figure_004 Figure_002 Figure_001 Additional information for the analysis (restricted access)