# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## Measurement of omega->3pi in pp collision at 7TeV with ALICE

16 Aug 2012, 16:00
2h

Poster Jets

### Speaker

Satoshi Yano (Hiroshima University (JP))

### Description

The $\omega$ meson is a promising probe to investigate the properties of the QGP. It is well known that the yield of high-p_t particles is suppressed in nucleus-nucleus collisions relative to that in pp collisions. The effect is attributed to the energy loss of the energetic parent partons traversing the created medium. Since $\pi^0$ and $\omega$ mesons have the same quark content (u and d), the comparison of the suppression between $\pi^$ and $\omega$ can provide information whether the energy loss occurs at the parton level or not. The ALICE detector covers a wide central region (|\eta|<0.9) to reconstruct charged particles and has two electro-magnetic calorimeters with good energy resolution. The $\omega$ meson is reconstructed in the $\pi^0\pi^+\pi^-$ channel in pp collisions at sqrt(s) = 7 TeV over a wide p_t range This is faciliated by a high-photon energy trigger. We discuss the trigger performance and cut optimization and present the latest results of the analysis.

### Primary author

Collaboration ALICE (CERN, Geneva, Switzerland)

### Co-authors

Satoshi Yano (Hiroshima University (JP))

### Presentation Materials

There are no materials yet.
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