Σ+ production in pp collisions at s=13 TeV
| Title: | Σ+ production in pp collisions at s=13 TeV |
|---|---|
| Authors: | ALICE Collaboration; Sub Plant-Microbe Interactions; Sub AW Externen; Seismology; Sub Physical Oceanography; Sub GRASP; Sub Algemeen Subatomic Physics; Dep Natuurkunde; Sub Subatomic Physics (SAP); Afd Subatomic Physics (SAP); Sub Mathematics Education; Sub Algemeen Physics Education; Economisch en Europees strafrecht |
| Publication Year: | 2026 |
| Subject Terms: | Engineering (miscellaneous); Physics and Astronomy (miscellaneous) |
| Description: | The measurement of Σ+ production in pp collisions at s=13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at s=13 TeV. The Σ+ is reconstructed via its weak-decay topology in the decay channel Σ+→p+π0 with π0→γ+γ. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (pT) distributions of the Σ+ and its rapidity densities dN/dy in both event classes are reported. The pT spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Σ+ to previously measured Λ baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Σ+ presented here will enable future studies of the interaction of Σ+ with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars. |
| Document Type: | article in journal/newspaper |
| File Description: | application/pdf |
| Language: | English |
| ISSN: | 1434-6044 |
| Relation: | https://dspace.library.uu.nl/handle/1874/481065 |
| Availability: | https://dspace.library.uu.nl/handle/1874/481065 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Accession Number: | edsbas.97B513CF |
| Database: | BASE |