UC Berkeley

The transverse momentum spectra and integrated yields of anti-Σ$$\Sigma $$ hyperons (Σ¯±$$\overline{\Sigma }^{\pm } $$) have been measured in pp$$\text {pp}$$ and p-Pb$$\text {p}{-}\text {Pb}$$ collisions at sNN=5.02$$\sqrt{s_{\textrm{NN}}}=5.02$$ TeV with the ALICE experiment. Measurements are performed via the newly accessed decay channel Σ¯±→n¯π±$$\overline{\Sigma }^{\pm } \!\!\rightarrow \mathrm{\overline{n}} \pi ^{\pm }$$. A new method of antineutron reconstruction with the PHOS electromagnetic spectrometer is developed and applied to this analysis. The pT$$p_{\textrm{T}}$$ spectra of Σ¯±$$\overline{\Sigma }^{\pm } $$ are measured in the range 0.5