Vázquez Gómez, RicardoBosch Mesquida, Manel2025-07-222025-07-222025-01https://hdl.handle.net/2445/222445Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2025, Tutor: Ricardo Vázquez GómezThe multiplicity dependence of both the D+s /D+ yield ratio and the prompt tonon-prompt production fractions of the D+ and D+s mesons are studied in PbPb collision data at a center-of-mass energy of √ s = 5.02 TeV. The data sample corresponds to an integrated luminosity of 230 μb−1 collected with the LHCb detector. An enhanced D+ s to D+ production is observed with increasing multiplicity, compatible with the strangeness enhancement signature. Additionally, as multiplicity increases, the prompt to non-prompt D+s production fraction manifests an increasing tendency, while the prompt to non-prompt D+ production fraction exhibits a non-monotonic behavior. Furthermore, searches for the D∗+s and Ds1(2460)+ states are performed, both in the D+s γ decay channel, but no evidence for the latter is found.6 p.application/pdfengcc-by-nc-nd (c) Bosch, 2025http://creativecommons.org/licenses/by-nc-nd/3.0/es/Detectors de radiacióGluonsTreballs de fi de grauNuclear countersGluonsBachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess