Particle Production at Large Transverse Momentum with ALICE

Abstract

We present transverse momentum distributions of inclusive charged particles and identified hadrons in $pp$ and Pb--Pb collisions at $\rs= 2.76$ TeV, measured by ALICE at the LHC. The Pb--Pb data are presented in intervals of collision centrality and cover transverse momenta up to 50 GeV/$c$. Nuclear medium effects are studied in terms of the nuclear modification factor \raa. The results indicate a strong suppression of high-$p_T$ particles in Pb--Pb collisions, consistent with a large energy loss of hard-scattered partons in the hot, dense and long-lived medium created at the LHC. We compare the preliminary results for inclusive charged particles to previous results from RHIC and calculations from energy loss models. Furthermore, we compare the nuclear modification factors of inclusive charged particles to those of identified ${\pi }^0$, ${\pi }^{\pm }$, K${}_s^0$, and $\Lambda$.

Talk given at Quark Matter 2011 conference

References in corpus (5)

• Enhanced strange baryon production in Au+Au collisions compared to p+p at sqrts = 200 GeV
• K0s and Λ production in Pb--Pb collisions with the ALICE experiment
• Charged Particle Production at Large Transverse Momentum in Pb$-$Pb Collisions at $\sqrt{s_{NN}}=2.76$ TeV Measured with ALICE at the LHC
• Suppression of neutral pion production at large transverse momentum measured with the ALICE experiment in Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV
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