Measurements of hadron production in p-Pb collisions serve as reference to help disectangle initial and final-state effects for the hadron suppresion observed at intermediate $p_T$ in Pb-Pb collisions. Moreover, the measurement of neutral mesons ($\pi^{0}$ and $\eta$) is important to estimate the background in the direct photon analysis. ALICE has measured $\pi^{0}$ and $\eta$ mesons via their two photon decay channel $\pi^{0}\rightarrow\gamma\gamma$ and $\eta\rightarrow\gamma\gamma$ and in the case of $\pi^{0}$ also via its Dalitz decay channel $\pi^{0}\rightarrow\gamma^{*}\gamma\rightarrow e^+e^-\gamma$. Photons were measured by electromagnetic calorimenters, PHOS and EMCal, and by their conversions into $e^+e^-$ in the central barrel using the TPC and ITS detectors. In this poster, the measurement of the $\pi^{0}$ and $\eta$ mesons will be presented and compared to theoretical model calculations. The $\eta$ to $\pi^0$ ratio and the nuclear modification factor $R_{p-Pb}$ will also be presented.

Poster sessions