# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## Formation and decay of hadronic resonances in hot and dense nuclear matter

16 Aug 2012, 16:00
2h
Regency 1/3 and Ambassador ()

### Regency 1/3 and Ambassador

Poster Heavy flavor and quarkonium production

### Speaker

Dr Sascha Vogel (Frankfurt Institute for Advanced Studies)

### Description

One of the fundamental objectives of experiments with ultra-relativistic heavy ions is the study of hadronic matter at high density and high temperature. In this investigation we study in particular the information which can be obtained by analyzing baryonic and mesonic resonances in both hadronic and leptonic decay channels. The decay products of these resonances carry information on the resonance properties at the space time point of their decay. We especially investigate the percentage of reconstructable resonances as a function of density for heavy ion collisions in the energy range between $E_{lab}$ = 30~AGeV and $\sqrt{s}$ = 200~AGeV, the energy domain between the future FAIR facility and the present RHIC collider. We will show the dependency of the reconstructability of resonances on baryon density, which unexpectedly increases with higher density. We will explain this phenomenon by analyzing the points of origin and the transverse momentum of the resonances. The differences between RHIC and FAIR energies will be explored. Additionally we study leptonic decay channels and argue that dileptons, contrary to the common thinking only offer a restricted view on the hot and dense phase of heavy ion collisions. Finally we will suggest measurements that might circumvent those problems.

### Primary author

Dr Sascha Vogel (Frankfurt Institute for Advanced Studies)

### Co-authors

Joerg Aichelin (Unknown) Marcus Bleicher (Uni Frankfurt)

### Presentation Materials

There are no materials yet.