Detector Laboratory

The study of the production of nuclei and antinuclei in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper, the production of protons, deuterons and $^3$He and their charge conjugates at midrapidity is studied as a function of the charged-particle multiplicity in inelastic pp collisions at $\sqrt{s}=5.02$ TeV using the ALICE detector. [...]

The production of prompt D0, Ds+, and Λc+ hadrons, and their ratios, Ds+/D0 and Λc+/D0, are measured in proton–proton collisions at $\sqrt{s}$ = 13 TeV at midrapidity (|y|<0.5) with the ALICE detector at the LHC. The measurements are performed as a function of the charm-hadron transverse momentum (p$_T$) in intervals of charged-particle multiplicity, measured with two multiplicity estimators covering different pseudorapidity regions. [...]

Annihilation dynamics plays a fundamental role in the baryon--antibaryon ($B-\overline{B}$) interaction at low-energy and its strength and range are crucial in the assessment of possible baryon bound states. Experimental data on annihilation cross sections are available for the $p-\overline{p}$ system but not in the low relative momentum region. [...]