# Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

19-24 May 2014
darmstadtium
Europe/Zurich timezone

## $K^{\ast}$(892)$^0$ resonance production with the ALICE experiment at the LHC

May 20, 2014, 4:30 PM
2h
spectrum (darmstadtium)

### spectrum

#### darmstadtium

Board: A-18
Poster QCD at High Temperature and/or Density

### Speaker

Kishora Nayak (National Institute of Science Education and Research (IN))

### Description

Short lived resonances are good probes to study the properties of strongly interacting matter produced in high energy heavy ion collisions. In particular, the resonance ${\rm K^{\ast 0}}$ is important because of its very short lifetime which is comparable to that of the fireball. The decay daughters are expected to undergo re-scattering and re-generation processes, which could modify the characteristic properties of ${\rm K^{\ast 0}}$ such as its mass, width and yield at low transverse momentum ($p_{\mathrm{T}}$). In addition, the yield of ${\rm K}^{\ast 0}$ at high ($p_{\mathrm{T}}$) may be suppressed in Pb-Pb relative to pp collisions due to the effect of the hot and dense medium formation. We report the measurement of the ${\rm K}^{\ast 0}$ resonance in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV and pp collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV via its hadronic decay channel $({\rm K}^{\ast 0}) (\overline{\rm K}^{\ast 0}) \rightarrow {\rm K}^{\pm}({\rm K}^{-}\pi^{+}) )$ with the ALICE detector. The centrality dependence of the mass, width, and yield of ${\rm K}^{\ast 0}$ in Pb-Pb collisions is compared to pp results to investigate the role of re-scattering and re-generation. The nuclear modification factor ($R_{\rm CP}$ and $R_{\rm AA}$) will be presented to study the effect of parton energy loss on ${\rm K}^{\ast 0}$ production and compared with other hadrons to understand the effect of baryon-meson separation.
On behalf of collaboration: ALICE

### Primary author

Kishora Nayak (National Institute of Science Education and Research (IN))

### Presentation materials

 Transparents