Strangeness in Quark Matter 2022 (SQM 2022)

K∗± production in Pb-Pb collisions with ALICE at the LHC

POS-RES-05

14 Jun 2022, 17:10

1h 50m

Metaverse

Board: RES-05

Poster Resonances and Hyper-nuclei Poster

Speaker

Prottay Das (National Institute of Science Education and Research (NISER) (IN))

Description

Short-lived hadronic resonances are very useful to probe the late-stage evolution of ultra-relativistic heavy-ion collisions. Since their lifetimes are comparable to the hadronic phase timespan, their measured yields are modified via rescattering and regeneration processes. The suppression of the K${}^{\ast 0}$/K ratio in central Pb--Pb collisions compared to pp interactions already hints at the dominance of rescattering effects over regeneration effects in the hadronic phase. The mass, lifetime and quark content of K${}^{\ast \pm }$ are comparable to those of K${}^{\ast 0}$. Hence, systematic measurements of K${}^{\ast 0}$ and K${}^{\ast \pm }$ enable us to investigate further the dynamics of the hadronic phase, to study its lifetime and to probe in-medium parton energy loss with high $p_{\mathrm{T}}$ resonances.

We report on the first measurement of K${}^{\ast \pm }$ production in midrapidity for Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV. The results include the transverse momentum spectra, integrated yields, mean transverse momenta, particle yield ratios, and nuclear modification factor as a function of charged-particle multiplicity. These results will be compared with published K${}^{\ast 0}$ measurements at the same energy.

Presentation materials

CKS_SQMconf_Prottay.pdf