# Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

3-9 November 2019
Wanda Reign Wuhan Hotel
Asia/Shanghai timezone

## Charged-particle multiplicity dependence of $\Sigma(1385)^{\pm}$ and $\Xi(1530)^{0}$ production in pp collisions at 13 TeV with ALICE at the LHC

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

#### Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Small systems

### Speaker

Bong-Hwi Lim (Pusan National University (KR))

### Description

Strangeness enhancement has been observed for several multi-strange hadrons in proton-proton (pp) collisions with increasing charged-particle multiplicity and is in remarkable agreement with measurements in p-Pb collisions. The yields of resonances with short lifetimes are sensitive to regeneration and re-scattering processes in the hadronic phase between chemical and kinetic freeze out. It is therefore interesting to study these resonances in pp collisions as a function of multiplicity to see if we can observe signs of a hadron-gas phase even in small collision systems. In this poster, the strange hyperon resonances $\Sigma(1385)^{\pm}$ ($c\tau=5-5.5$ fm/$c$) and $\Xi(1530)^{0}$ ($c\tau=21.8$ fm/$c$) are studied as a function of charged-particle multiplicity in pp collisions at $\sqrt{s}=13$~TeV. The $p_{\mathrm{T}}$ spectra, mean $p_{\mathrm{T}}$ and integrated yields and their ratios to long-lived hadrons will be reported and compared to measurements in other collision systems and to theoretical models.

### Primary author

Bong-Hwi Lim (Pusan National University (KR))