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    Charm content in jets in proton-proton collisions with the alice experiment at cern-lhc

    Grelli, Alessandro
    Journal of Physics: Conference Series, 2011, Vol.270(1), p.012019 (4pp) [Peer Reviewed Journal]
    IOPscience (IOP Publishing)
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    Title: Charm content in jets in proton-proton collisions with the alice experiment at cern-lhc
    Author: Grelli, Alessandro
    Subject: Channels ; Mesons ; Collisions ; Jets ; Calibration ; Decay ; Conjugates ; Tools ; Atomic and Molecular Physics (General) (So) ; Physics of Metals (MD) ; Physics (General) (Ah);
    Description: Charm and bottom quarks have been proposed as probes to study partonic matter produced in high-energy heavy-ion collisions. The detailed understanding of the production mechanisms in proton-proton collisions is of considerable interest as a QCD test tool and as reference calibration for heavy-ion studies. Measurements of the D meson yield in jets probe the production processes in which the observed D mesons are formed primarily from gluon splitting into c or b pairs. The charm content in jets is calculable in perturbative QCD, and the leading non-perturbative correction is expected to be significant at LHC energies. In this contribution we present a performance study of the reconstruction of charged D *± mesons in jets based on the first data collected by the ALICE experiment in minimum bias p+p collisions at 7 TeV . D *+ mesons are reconstructed through the decay sequence D *+ D 0 + and D 0 K + (and its charge conjugate channel).
    Is part of: Journal of Physics: Conference Series, 2011, Vol.270(1), p.012019 (4pp)
    Identifier: 1742-6588 (ISSN); 1742-6596 (E-ISSN); 10.1088/1742-6596/270/1/012019 (DOI)

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    Heavy flavour physics with the alice detector at the cern-lhc

    Grelli, Alessandro
    Journal of Physics: Conference Series, 2011, Vol.316(1), p.012025 (7pp) [Peer Reviewed Journal]
    IOPscience (IOP Publishing)
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    Title: Heavy flavour physics with the alice detector at the cern-lhc
    Author: Grelli, Alessandro
    Subject: Mesons ; Quarks ; Collisions ; Decay ; Spectra ; Flavours ; Cross Sections ; Mathematical Analysis ; Atomic and Molecular Physics (General) (So) ; Physics of Metals (MD) ; Physics (General) (Ah);
    Description: Heavy quarks have been proposed as powerful probes to study hot quark matter produced in high-energy heavy-ion collisions. The measurement of the charm and beauty production cross sections in pp collisions provides a reference for the studies in heavy ion collisions. Moreover, the pp measurements at LHC will allow to test the perturbative QCD calculations in a totally new energy domain. In this contribution we present the first results from the analysis of charm and beauty production in pp collisions at √ s 7 TeV with the ALICE experiment, using the hadronic D meson and semi-leptonic D and B meson decays. In this talk I will present the first cross section measurement of muons from heavy flavour decays at forward rapidity and the heavy flavour electron spectra at central rapidity. We report on the first D meson cross section at central rapidity and the J/ production cross section at central and forward rapidity.
    Is part of: Journal of Physics: Conference Series, 2011, Vol.316(1), p.012025 (7pp)
    Identifier: 1742-6588 (ISSN); 1742-6596 (E-ISSN); 10.1088/1742-6596/316/1/012025 (DOI)

    • Several versions

    ALICE Overview

    Grelli, Alessandro
    arXiv.org, Nov 9, 2017 [Peer Reviewed Journal]

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    Heavy-flavour production in Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV with the ALICE detector

    Grelli, Alessandro
    arXiv.org, Oct 28, 2013
    © 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 in Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV with the ALICE detector
    Author: Grelli, Alessandro
    Contributor: Grelli, Alessandro (pacrepositoryorg)
    Subject: Quarks ; Charm (Particle Physics) ; Hadrons ; Flavor (Particle Physics) ; Radiometric Dating ; Quantum Chromodynamics ; Thermalization (Energy Absorption) ; Energy Dissipation ; Dependence ; Ionic Collisions
    Description: Hadrons containing heavy-flavours, i.e. charm and beauty quarks, are unique probes of the properties of the hot and dense QCD medium produced in heavy-ion collisions. Due to their large masses, heavy quarks are produced at the initial stage of the collision, almost exclusively via hard partonic scattering processes. Therefore, they are expected to experience the full collision history propagating through and interacting with the QCD medium. The parton energy loss, which is sensitive to the transport coefficients of the produced medium, can be studied experimentally by measuring the nuclear modication factor (\(R_{\rm AA}\)) which accounts for the modication of the heavy-flavoured hadron yield in Pb-Pb collisions with respect to pp collisions. In semi-central Pb-Pb collisions, the degree of thermalization of charm quarks in the QCD medium can be accessed via the measurement of the heavy flavour elliptic flow \(v_2\) at low \(p_{\rm T}\) . At high \(p_{\rm T}\), \(v_2\) is sensitive to the...
    Is part of: arXiv.org, Oct 28, 2013
    Identifier: 2331-8422 (E-ISSN)

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    Title: Heavy-flavour production in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV with the ALICE detector
    Author: Grelli, Alessandro
    Subject: High Energy Physics - Experiment ; Nuclear Experiment
    Description: Hadrons containing heavy-flavours, i.e. charm and beauty quarks, are unique probes of the properties of the hot and dense QCD medium produced in heavy-ion collisions. Due to their large masses, heavy quarks are produced at the initial stage of the collision, almost exclusively via hard partonic scattering processes. Therefore, they are expected to experience the full collision history propagating through and interacting with the QCD medium. The parton energy loss, which is sensitive to the transport coefficients of the produced medium, can be studied experimentally by measuring the nuclear modication factor ($R_{\rm AA}$) which accounts for the modication of the heavy-flavoured hadron yield in Pb-Pb collisions with respect to pp collisions. In semi-central Pb-Pb collisions, the degree of thermalization of charm quarks in the QCD medium can be accessed via the measurement of the heavy flavour elliptic flow $v_2$ at low $p_{\rm T}$ . At high $p_{\rm T}$, $v_2$ is sensitive to the path-length dependence of heavy quark in-medium energy loss. The ALICE collaboration has measured the production of open heavy flavour hadrons via their hadronic and semi-leptonic decays at mid-rapidity and in the semi-muonic decay channel at forward rapidity in pp, p-Pb and Pb-Pb collisions at 7, 5.02 and 2.76 TeV respectively. In this talk the current results on open heavy-flavour $R_{\rm AA}$ and $v_2$ will be presented.
    Identifier: 1310.7366 (ARXIV ID)

    • Several versions

    D meson nuclear modification factors in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV with the ALICE detector

    Grelli, Alessandro
    arXiv.org, Oct 27, 2012 [Peer Reviewed Journal]

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    Experimental overview on heavy-flavor production

    Grelli, Alessandro
    Journal of Physics: Conference Series, 2017, Vol.832(1), pp.urn:issn:1742-6588 [Peer Reviewed Journal]
    NARCIS (National Academic Research and Collaborations Information System)
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    Title: Experimental overview on heavy-flavor production
    Author: Grelli, Alessandro
    Subject: Physics And Astronomy(All)
    Description: Hadrons containing heavy-flavors are unique probes of the properties of the hot and dense QCD medium produced in heavy-ion collisions. Due to their large masses, heavy quarks are produced at the initial stage of the collision, almost exclusively via hard partonic scattering processes. Therefore, they are expected to experience the full collision history propagating through and interacting with the QCD medium. The parton energy loss, which is sensitive to the transport coefficients of the produced medium, can be studied experimentally by measuring the nuclear modification factor which accounts for the modification of the heavy-flavored hadron yield in Pb-Pb collisions with respect to pp collisions. In semi-central Pb-Pb collisions, the degree of thermalization of charm quarks in the QCD medium can be accessed via the measurement of the heavy flavor elliptic flow v2 at low pT. Furthermore, the measurement of heavy-flavors production in pp collisions allows testing the perturbative QCD calculations....
    Is part of: Journal of Physics: Conference Series, 2017, Vol.832(1), pp.urn:issn:1742-6588
    Identifier: (ISSN); 1742-6588 (ISSN)

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    ALICE Overview

    Grelli, Alessandro
    NARCIS (National Academic Research and Collaborations Information System)
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    Title: ALICE Overview
    Author: Grelli, Alessandro
    Subject: Physics And Astronomy(All)
    Description: An overview of the recent results obtained by the ALICE Collaboration from the analysis of the pp, p-Pb and Pb-Pb data samples collected during LHC run I and the first half of run II is presented.
    Identifier: 9782759890330 (ISBN)

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    Heavy flavour production at LHC

    Grelli, Alessandro, Mischke, Andre
    arXiv.org, Sep 25, 2009
    © 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 at LHC
    Author: Grelli, Alessandro; Mischke, Andre
    Contributor: Mischke, Andre (pacrepositoryorg)
    Subject: Large Hadron Collider ; Protons ; Quantum Chromodynamics ; Particle Collisions ; Ionic Collisions
    Description: The Large Hadron Collider (LHC) will open a new era in high energy physics. The expected large cross section for heavy flavour production in proton-proton collisions at \(\sqrt{s}\) = 14 TeV will allow detailed studies of the production mechanisms and an extensive test of Quantum Chromodynamics. Since charm and beauty has been proposed as a good probe to study hot and dense QCD matter, the understanding of the production mechanisms in elementary proton-proton collisions is of primary importance as a reference for studies in heavy-ion collisions. In the early phase of LHC operation the experiments will focus on the investigation of the heavy flavour production mechanisms.
    Is part of: arXiv.org, Sep 25, 2009
    Identifier: 2331-8422 (E-ISSN)

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    Heavy flavour production at LHC

    Grelli, Alessandro, Mischke, Andre
    PoS EPS-HEP2009:317,2009
    Cornell University
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    Title: Heavy flavour production at LHC
    Author: Grelli, Alessandro; Mischke, Andre
    Subject: High Energy Physics - Experiment
    Description: The Large Hadron Collider (LHC) will open a new era in high energy physics. The expected large cross section for heavy flavour production in proton-proton collisions at $\sqrt{s}$ = 14 TeV will allow detailed studies of the production mechanisms and an extensive test of Quantum Chromodynamics. Since charm and beauty has been proposed as a good probe to study hot and dense QCD matter, the understanding of the production mechanisms in elementary proton-proton collisions is of primary importance as a reference for studies in heavy-ion collisions. In the early phase of LHC operation the experiments will focus on the investigation of the heavy flavour production mechanisms. Comment: 7 pages, 10 figures. Invited overview talk presented at the Europhysics Conference on High Energy Physics, Krakow, Poland, 16-22 July 2009. Proceedings to be published in Proceedings of Science
    Is part of: PoS EPS-HEP2009:317,2009
    Identifier: 0909.4769 (ARXIV ID)