View Item 
        •   Utrecht University Student Theses Repository Home
        • UU Theses Repository
        • Theses
        • View Item
        •   Utrecht University Student Theses Repository Home
        • UU Theses Repository
        • Theses
        • View Item
        JavaScript is disabled for your browser. Some features of this site may not work without it.

        Browse

        All of UU Student Theses RepositoryBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

        Azimuthal angular correlations of heavy flavour decay electrons and charged hadrons in proton-proton collisions at sqrt(s) = 7 TeV using the ALICE detector

        Thumbnail
        View/Open
        thesis final voorkant.pdf (7.888Mb)
        Publication date
        2013
        Author
        Maarel, J. van der
        Metadata
        Show full item record
        Summary
        Using measurements of the ALICE detector of proton-proton collisions at a center-of-mass energy of sqrt(s) = 7 TeV, the azimuthal angular correlation per trigger between electrons from semi-leptonic decay of heavy flavour mesons and charged hadrons is calculated. By using Monte Carlo simulations to calculate the correlation distributions for electrons from D and B mesons, the relative beauty contribution to the heavy flavour electron decay spectra was measured. This measurement is compared to earlier performed measurements with the same method in proton-proton collisions at sqrt(s) = 2.76 TeV and measurements with the impact parameter method at sqrt(s) = 7 TeV. The results are in agreement with each other within the statistical and systematic errors. The measured values are also compared to FONLL calculations. An agreement within the uncertainties is found. The near-side correlation strength was extracted by fitting a Gaussian on the near-side. This was then compared to central and semi-central Pb-Pb collisions at center-of-mass energy per nucleon pair of sqrt(s_{NN}) = 2.76 TeV. The I_{AA} is the ratio of the yield of Pb-Pb and pp, and is measured to be around 1. This would mean that there is no suppression or enhancement in Pb-Pb collisions. But because of the large uncertainties in the Pb-Pb analysis it is hard to make strong statements about the modification of the yield in the QCD medium.
        URI
        https://studenttheses.uu.nl/handle/20.500.12932/14626
        Collections
        • Theses
        Utrecht university logo