Speaker
Satoshi Yano
(Hiroshima University (JP))
Description
The $\omega$ meson is a promising probe to investigate the properties of the Quark-Gluon Plasma (QGP). It is well known that the yield of high-pT particles is suppressed in nucleus-nucleus collisions relative to that in pp collisions. The effect is attributed to energy loss of parent partons or perhaps of hadrons after freeze-out. Since $\pi^0$ and $\omega$ mesons have the same quark contents (u and d) but different masses, the comparison of the suppression between $\pi^0$ and $\omega$ can provide information whether the energy loss occurs at the parton level or not.
In this talk, we discuss the measurement of the $\omega$ meson reconstructed in the $\pi^0\pi^+\pi^-$ channel in pp collisions at sqrt(s) = 7 TeV over a wide pT range as a baseline for the nuclear suppression. At high pT the measurement can be further extended by a photon triggered dataset. We discuss the trigger performance, and report the latest status of the analysis.
Primary author
Satoshi Yano
(Hiroshima University (JP))
Co-author
collaboration ALICE
(CERN)
