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    Recent Results from the ALICE Collaboration

    Bruna, Elena
    Nuclear physics news, 03 April 2014, Vol.24(2), pp.13-19 [Peer Reviewed Journal]
    Taylor & Francis (Taylor & Francis Group)
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    Title: Recent Results from the ALICE Collaboration
    Author: Bruna, Elena
    Subject: Physics
    Description: The world, as we know, is composed of quarks, gluons, and leptons and it is governed by four fundamental interactions. One of them is the strong interaction, described by the theory of Quantum ChromoDynamics (QCD), responsible for the confinement of quarks inside nucleons. The only way to free experimentally quarks from their confined state is to put the nuclear matter under extreme conditions of high temperature and/or energy density with relativistic collisions of heavy ions. This deconfined medium is called "Quark Gluon Plasma" (QGP) [ 1 ].
    Is part of: Nuclear physics news, 03 April 2014, Vol.24(2), pp.13-19
    Identifier: 1061-9127 (ISSN); 1931-7336 (E-ISSN); 10.1080/10619127.2014.910429 (DOI)

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    Title: Heavy-flavour production and multiplicity dependence in pp and p--Pb collisions with ALICE
    Author: Bruna, Elena
    Subject: Nuclear Experiment
    Description: The production of heavy quarks in pp collisions provides a precision test of perturbative QCD calculations at the LHC energies. More complex collision systems like p--Pb collisions allow studies of cold nuclear matter effects, such as modifications of the parton distribution functions at small x and of the $\kt$ broadening effect. We present the ALICE results of prompt D-meson production as a function of the charged-particle multiplicity, in pp and p--Pb collisions at $\sqrt{s}=7$ TeV and $\sqrt{s_{NN}}=5.02$ TeV respectively. The per-event yield of D mesons in different multiplicity and $\pt$ intervals are compared for pp and p--Pb collisions to study the contribution of multi-parton interactions to open-charm production. Angular correlations of prompt D mesons and heavy-flavour decay electrons with charged hadrons in pp and p-Pb collisions are also shown in different kinematic ranges and compared to pQCD models. These measurements provide information on the charm fragmentation processes, on cold nuclear matter effects on charm production, and on the participation of charm in the collective motion arising in small collision systems like p-Pb. Comment: Proceedings for the LHCP Conference, 2014
    Identifier: 1409.4675 (ARXIV ID)

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    Jet measurements in the STAR experiment

    Bruna, Elena
    Cornell University
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    Title: Jet measurements in the STAR experiment
    Author: Bruna, Elena
    Subject: Nuclear Experiment
    Description: Jets are produced from hard scatterings in the early stages of heavy-ion collisions, therefore they can be exploited as probes for medium tomography. Such high-$p_T$ partons are expected to suffer energy loss in the hot and dense nuclear medium via gluon radiation or elastic collisions along their path. Jet reconstruction gives access to the kinematics of the hard scattering that produced the jet, improving our understanding of energy loss and its effect on the jet structure. Such measurements are challenging in heavy-ion collisions at RHIC, due to the large background, therefore a precise characterization of the background in Au+Au is needed. We present an overview of the results on jet measurements obtained by the STAR experiment in p+p, d+Au and central Au+Au collisions at 200 GeV. We also present results obtained with reconstructed di-jets and jet-hadron correlations as tools to study the medium effects on jet production.
    Identifier: 1110.2795 (ARXIV ID)

    • Several versions

    Measurements of di-jets in p+p and Au+Au in the STAR experiment

    Bruna, Elena
    arXiv.org, Jan 27, 2011 [Peer Reviewed Journal]

    • Several versions

    D-meson nuclear modification factor and v\(_2\) in Pb-Pb collisions at the LHC

    Bruna, Elena
    arXiv.org, Jan 8, 2014 [Peer Reviewed Journal]

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    Heavy-flavour production and multiplicity dependence in pp and p--Pb collisions with ALICE

    Bruna, Elena
    arXiv.org, Sep 17, 2014
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: Heavy-flavour production and multiplicity dependence in pp and p--Pb collisions with ALICE
    Author: Bruna, Elena
    Contributor: Bruna, Elena (pacrepositoryorg)
    Subject: Collisions ; Charm (Particle Physics) ; Quarks ; Hadrons ; Mesons ; Quantum Chromodynamics ; Charged Particles ; Dependence ; Nuclear Matter ; Distribution Functions ; Particle Production
    Description: The production of heavy quarks in pp collisions provides a precision test of perturbative QCD calculations at the LHC energies. More complex collision systems like p--Pb collisions allow studies of cold nuclear matter effects, such as modifications of the parton distribution functions at small x and of the \(\kt\) broadening effect. We present the ALICE results of prompt D-meson production as a function of the charged-particle multiplicity, in pp and p--Pb collisions at \(\sqrt{s}=7\) TeV and \(\sqrt{s_{NN}}=5.02\) TeV respectively. The per-event yield of D mesons in different multiplicity and \(\pt\) intervals are compared for pp and p--Pb collisions to study the contribution of multi-parton interactions to open-charm production. Angular correlations of prompt D mesons and heavy-flavour decay electrons with charged hadrons in pp and p-Pb collisions are also shown in different kinematic ranges and compared to pQCD models. These measurements provide information on the charm fragmentation...
    Is part of: arXiv.org, Sep 17, 2014
    Identifier: 2331-8422 (E-ISSN)

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    Jet measurements in the STAR experiment

    Bruna, Elena
    arXiv.org, Oct 12, 2011
    © ProQuest LLC All rights reserved, Engineering Database, Publicly Available Content Database, ProQuest Engineering Collection, ProQuest Technology Collection, ProQuest SciTech Collection, Materials Science & Engineering Database, ProQuest Central (new), ProQuest Central Korea, SciTech Premium Collection, Technology Collection, ProQuest Central Essentials, ProQuest One Academic, Engineering Collection (ProQuest)
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    Title: Jet measurements in the STAR experiment
    Author: Bruna, Elena
    Contributor: Bruna, Elena (pacrepositoryorg)
    Subject: Partons ; Energy Dissipation ; Kinematics ; Elastic Scattering ; Correlation Analysis ; Ionic Collisions
    Description: Jets are produced from hard scatterings in the early stages of heavy-ion collisions, therefore they can be exploited as probes for medium tomography. Such high-\(p_T\) partons are expected to suffer energy loss in the hot and dense nuclear medium via gluon radiation or elastic collisions along their path. Jet reconstruction gives access to the kinematics of the hard scattering that produced the jet, improving our understanding of energy loss and its effect on the jet structure. Such measurements are challenging in heavy-ion collisions at RHIC, due to the large background, therefore a precise characterization of the background in Au+Au is needed. We present an overview of the results on jet measurements obtained by the STAR experiment in p+p, d+Au and central Au+Au collisions at 200 GeV. We also present results obtained with reconstructed di-jets and jet-hadron correlations as tools to study the medium effects on jet production.
    Is part of: arXiv.org, Oct 12, 2011
    Identifier: 2331-8422 (E-ISSN)

    • Several versions

    Overview on jet results from star

    Bruna, Elena
    Journal of Physics: Conference Series, 2010, Vol.230(1), p.012009 (6pp) [Peer Reviewed Journal]

    • Several versions

    Di-jet measurements in heavy-ion collisions at STAR

    Bruna, Elena
    arXiv.org, Oct 15, 2010 [Peer Reviewed Journal]

    • Several versions

    Study of jet fragmentation in p+p collisions at 200 GeV in the STAR experiment

    Bruna, Elena
    The European Physical Journal C, 2009, Vol.62(1), pp.133-137 [Peer Reviewed Journal]