Abstract
Strangeness enhancement has been studied through different particles such as K, \(\Lambda\) , \(\Xi\) , and \(\Omega\) , except \(\Sigma\) . The ALICE collaboration has developed several innovative techniques for identifying charged \(\Sigma\) hyperons during LHC Run 2. A primary challenge in these measurements is the reconstruction of neutral decay products, including antineutrons, neutral mesons, and soft photons, utilizing the electromagnetic calorimeter and the photon conversion method. A novel approach for detecting antineutrons in the Photon Spectrometer has been established, enabling the reconstruction of \(\overline{\Sigma}^{\pm}\rightarrow\overline{n}\pi^{\pm}\) decay channels. This work presents the transverse momentum spectra of \(\overline{\Sigma}^{\pm}\) in minimum bias pp and p–Pb collisions at \(\sqrt{s_{\textrm{NN}}}=5.02\) TeV, comparing them with predictions from state-of-the-art Monte Carlo event generators. Additionally, results from Run 2 concerning the spectrum and integrated yield of \(\Sigma^{+}\rightarrow p\pi^{0}\) is discussed, providing further insight into strangeness production enhancement in small collision systems.
