May 17 – 22, 2021
US/Eastern timezone

Strange particle collectivity in pPb and PbPb with CMS

May 18, 2021, 9:30 AM
Room A (Zoom)

Room A


zoom co-host: Niveditha Ramasubramanian
Experimental talk Bulk matter phenomena associated with strange and heavy quarks Bulk (Collectivity)


Quan Wang (The University of Kansas (US))


We present the elliptic azimuthal anisotropy coefficient ($v_2$) of the identified strange hadrons $K_{S}^{0}$ and $\Lambda$ using the scalar product and multi-particle cumulant methods in pPb collisions at 8.16 TeV and PbPb collisions at 5.02 TeV at mid-rapidity (|y|<1). The data samples were collected by the CMS experiment at the LHC. The scalar product and multi-particle $v_2$ values are measured as a function of $p_{T}$ for different centralities in PbPb and event multiplicities in pPb collisions. The $v_2$ results are compared to the inclusive charged hadrons as well as the hydrodynamic model calculations with different initial state conditions. The identified multi-particle $v_2$ in such a small collision system is measured for the first time. The results shed light on the initial state effects of the strange quark in large and small collision systems.

Collaboration CMS

Primary author

Serguei Petrushanko (M.V. Lomonosov Moscow State University (RU))

Presentation materials