Skip to content
University of Maryland LibrariesDigital Repository at the University of Maryland
    • Login
    View Item 
    •   DRUM
    • Theses and Dissertations from UMD
    • UMD Theses and Dissertations
    • View Item
    •   DRUM
    • Theses and Dissertations from UMD
    • UMD Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Nuclear Modification Factor of High Momentum Jets in PbPb Collisions

    Thumbnail
    View/Open
    Lu_umd_0117E_14052.pdf (6.972Mb)
    No. of downloads: 592

    Date
    2013
    Author
    Lu, Ying
    Advisor
    Mignerey, Alice
    Metadata
    Show full item record
    Abstract
    According to quantum chromodynamics (QCD), the release of quarks and gluons creates a new form of matter, the quark gluon plasma (QGP), expected to occur in relativistic heavy-ion collisions at high energies. The structure and dynamics of the QGP can be studied using partonic interactions at large momentum transfers. This was studied at the Relativistic Heavy Ion Collider starting in 2002 utilizing AuAu collisions at 200 GeV center-of-mass. In this analysis, fully reconstructed jets in pp and PbPb collisions at 2.76 TeV center-of-mass energy are analyzed with the CMS detector at the Large Hadron Collider (LHC) in CERN. The ratio of inclusive reconstructed jet transverse momenta spectra of PbPb collisions to that of proton+proton (pp) collisions is defined as jets nuclear modification factor (R<sub>AA</sub>) and it is studied to quantify the medium modification within transverse momenta above 100GeV/c. Jet R<sub>AA</sub> results are compared for three different unfolding methods: Bayesian Unfolding, bin-by-bin Unfolding and Generalized Singular Value Decomposition (GSVD) Unfolding, as well as corrections performed with pp data smearing. A jet R<sub>AA</sub> of approximately 0.5 is observed in the most central collisions and close to unity in the most peripheral collisions without a strong indication of the transverse momenta (p<sub>T</sub>) dependence. A suppression of high p<sub>T</sub> jets is observed in central PbPb collisions in comparison to peripheral collisions. This is consistent with the observation of jet quenching.
    URI
    http://hdl.handle.net/1903/14010
    Collections
    • Chemistry & Biochemistry Theses and Dissertations
    • UMD Theses and Dissertations

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility
     

     

    Browse

    All of DRUMCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister
    Pages
    About DRUMAbout Download Statistics

    DRUM is brought to you by the University of Maryland Libraries
    University of Maryland, College Park, MD 20742-7011 (301)314-1328.
    Please send us your comments.
    Web Accessibility