Zhuo Zhou

Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider

The production of (anti-)deuteron and (anti-)3He nuclei in Pb–Pb collisions at √ sNN = 2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, 3He/d and 3He/p, in Pb–Pb collisions are found to be in agreement with a common chemical freeze-out temperature of Tchem ≈ 156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb–Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at √ s = 7 TeV is also presented. While the p/π ratio is similar in pp and Pb–Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb–Pb collisions. ∗See Appendix A for the list of collaboration members ar X iv :1 50 6. 08 95 1v 3 [ nu cl -e x] 9 A pr 2 01 6 Production of light (anti-)nuclei in pp and Pb–Pb collisions at LHC energies ALICE Collaboration

Differential studies of inclusive J/

The production of J/

\psi

\psi

and

and

\psi

\psi(2S)

(2S) production at forward rapidity in Pb-Pb collisions at

was measured with the ALICE detector in Pb-Pb collisions at the LHC. The measurement was performed at forward rapidity (

\mathbf{\sqrt{{\textit s}_{_{NN}}}}

2.5<y<4

= 2.76 TeV

) down to zero transverse momentum (

Measurement of jet quenching with semi-inclusive hadron-jet distributions in central Pb-Pb collisions at sNN=2.76 TeV

p_{\rm T}

Inclusive, prompt and non-prompt J/psi production at mid-rapidity in Pb-Pb collisions at root S-NN=2.76 TeV

) in the dimuon decay channel. Inclusive J/