Speaker
Description
Forward and backward rapidity regions are rich laboratories to explore several effects which happens to a probe before and after its hard scattering. The large rapidity region may also experiment a different dynamics for strangeness enhancement seen in heavy ion collisions at RHIC and LHC. The PHENIX experiment has a long history of large rapidity measurements with the muon spectrometers covering 1.2$<|\eta|<$2.2 and a forward calorimeter (MPC) covering 3.1$<|\eta|<$3.8. The addition of a pre-shower detector, the MPC-ex in front of the MPC, allows the identification of $\pi^0$ in a broad momentum range covering a Bjorken-x region between $10^{-3}-10^{-2}$. This presentation will report two measurements: i)$\phi$ meson nuclear modification using the muon spectrometer in $d$+Au, Cu+Au and Au+Au which can explore how strangeness are affected by initial and final state effects and its behavior in QGP at large rapidity; ii) $\pi^0$ nuclear modification factor in $d$+Au collisions which are sensitive to parton shadowing and gluon saturation.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | PHENIX |
