Production of Σ baryons as a function of multiplicity in pp collisions at the LHC with ALICE
In recent year, the production of charged Σ hyperons in pp and p–Pb collisions was measured by the ALICE collaboration using several techniques. Historically, the first one used the decay channel Σ+ → pπ0 with reconstruction of the proton with the tracking systems at mid-rapidity and the π0 in the e...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2025-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2025/01/epjconf_sqm2024_03003.pdf |
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| Summary: | In recent year, the production of charged Σ hyperons in pp and p–Pb collisions was measured by the ALICE collaboration using several techniques. Historically, the first one used the decay channel Σ+ → pπ0 with reconstruction of the proton with the tracking systems at mid-rapidity and the π0 in the electromagnetic calorimeter EMCAL or via the photon conversion method. The second technique used the decay channel ∑-± → n¯π± where charged pions are reconstructed with the tracking systems and the anti-neutron in the precise electromagnetic calorimeter PHOS. We present the transverse momentum spectra of charged Σ and its anti-particle measured in pp collisions at √s = 13 and √s = 5 TeV and compare them to predictions of several models. Finally, we discuss expectations from the Run 3 of LHC and in particular the possibility of Σ particle detection with the reconstruction of its decay after traversing several layers of the upgraded silicon tracker. |
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| ISSN: | 2100-014X |