Investigating the f0(500) meson using π+π− correlations in LHC proton-proton collisions at √s = 13 TeV
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Date
2024-08
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The Ohio State University
Abstract
This thesis presents a detailed femtoscopy study of the f0(500) meson using π+π− correlations in proton-proton collisions at √s = 13 TeV, conducted with data from the ALICE experiment at the Large Hadron Collider. The analysis utilizes a Gaussian source simplification to fit the experimental two-particle correlation functions, allowing the extraction of a source size parameter (R) and a strength parameter (λ) based on strong final-state interaction. The fit results give R = 1.10±0.01 fm and λ = 0.46±0.008. Additionally, the extracted resonance mass (MR) and width (WR) of the f0(500) resonance are consistent with the limits provided by the Review of Particle Physics. The λ dependence on R is shown to follow a simple geometric tetraquark model, supporting the hypothesis that the f0(500) meson is a four-quark state.
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Keywords
femtoscopy, HBT, ALICE, CERN, correlations, proton collisions, Lednicky, quantum mechanics