# Online Strangeness in Quark Matter Conference 2021

May 17 – 22, 2021
US/Eastern timezone

## Strange particle collectivity in pPb and PbPb with CMS

May 18, 2021, 9:30 AM
20m
Room A (Zoom)

### Room A

#### Zoom

zoom co-host: Niveditha Ramasubramanian https://stonybrook.zoom.us/j/99346269726
Experimental talk Bulk matter phenomena associated with strange and heavy quarks

### Speaker

Quan Wang (The University of Kansas (US))

### Description

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))