Speaker
Description
The first measurements of the transverse momentum
($p_{\rm{T}}$) spectra, integrated yields and mean $p_{\rm T}$ of $\Sigma^{0}$ and $\overline{\Sigma}^{0}$ hyperons
in pp collisions at $\sqrt{s} = 7$ TeV at the LHC are presented.
The $\Sigma^{0}$($\overline{\Sigma}^{0}$) is reconstructed
via its electromagnetic decay channel $\Lambda$($\overline{\Lambda}$)$\gamma$.
The $\Lambda$ ($\overline{\Lambda}$) baryon is reconstructed via its decay into p + $\pi^{-}$
($\overline{ \rm{p}} + \pi^{+}$), while the photon is detected by exploiting the unique capability
of the ALICE detector to measure low-energy photons via conversion into e$^{+}$e$^{-}$ pairs
in the detector material.
The yield of $\Sigma^{0}$ is compared to that of the $\Lambda$ baryon, which has the same quark
content but different isospin. These data contribute to the understanding of hadron production
mechanisms and provide a reference for constraining QCD-inspired models and tuning Monte Carlo
event generators such as PYTHIA.
In addition, the results on the first detection of $\Sigma^{+}$ hyperon at LHC with ALICE are shown.
Also, the feasibility of a search for a bound state of proton, neutron and
$\Sigma^{0}(\Sigma^0$-hypernuclei $^{3}_{\Sigma^{0}}$H) is presented, based on the luminosities foreseen for
the LHC Runs 3 and 4.
