Inclusive electron spectrum from heavy-flavour decays in proton-proton collisions at measured with ALICE at LHC

Masciocchi, S.

doi:10.1016/j.nuclphysa.2011.02.098

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…The magnitude of the yield suppression of the near-side peak in central Pb+Pb collisions at √ s NN = 5.52 TeV is similar to the nuclear modification factor of the single electrons, as illustrated in the right panel of Figure 5. The single electron R AA agrees with the ALICE measurement [24] and previous theoretical model calculations [25]. Figure 6.…”

Section: Azimuthal Correlations Of Heavy-flavor Particlesupporting

confidence: 87%

Jet-like correlations of heavy-flavor particles – from RHIC to LHC

Mischke

2011

J. Phys.: Conf. Ser.

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Abstract. Measurements at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory have revealed strong modification of the jet structure in high-energy heavyion collisions, which can be attributed to the interaction of hard scattered partons with the hot and dense QCD matter. The study of heavy-quark (charm and bottom) production in such collisions provides key tests of parton energy-loss models and, thus, yields profound insight into the properties of the produced matter. The high-p T yield of heavy-flavor decay electrons exhibits an unexpected large suppression. Since those single electrons have contributions from charm and bottom decays an experimental method is needed to investigate them separately. Heavyflavor particle correlations provide information about the underlying production mechanism. In this contribution, a review on recent measurements on azimuthal correlations of single electrons and open charmed mesons at RHIC and perspectives of such measurements at the CERN-Large Hadron Collider (LHC) are presented. Moreover, it has been shown that next-to-leading-order (NLO) QCD processes, such as gluon splitting, become important at LHC energies. It will be demonstrated how this contribution can be determined through the measurement of the charm content in jets. IntroductionThe energy loss of partons is predicted to be a sensitive probe of the QCD matter created in high energy nucleus-nucleus collisions since its magnitude depends strongly on the color charge density of the matter traversed [1,2]. In particular, the understanding of the flavor dependent coupling of quarks and the modification of their fragmentation function give essential information on the properties of the hot QCD matter produced in such collisions [3,4]. Due to their large mass (m > 1.2 GeV/c 2 ), heavy quarks are believed to be produced predominantly in hard scattering processes in the early stage of the collision and, therefore, probe the complete space-time evolution of the expanding medium and their yields are sensitive to the initial gluon density [5]. Heavy-quark production by initial state gluon fusion also dominates in heavy-ion collisions where many, in part overlapping nucleon-nucleon collisions occur. It has been shown that charm production in the QCD medium might be significant at LHC energies [6]. The penetrating power of heavy quarks is much higher than for light quarks, providing a sensitive probe of the matter. Theoretical models based on perturbative QCD predict that the energy loss of heavy quarks in the medium is expected to be smaller compared to light-quarks and gluons due to the mass dependent suppression of the gluon radiation at small angles, the so-called dead-cone effect [7,8].

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Section: Azimuthal Correlations Of Heavy-flavor Particlesupporting

confidence: 87%

Jet-like correlations of heavy-flavor particles – from RHIC to LHC

Mischke

2011

J. Phys.: Conf. Ser.

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“…Electrons are reconstructed in the range |η| < 0.8 by the ITS and the TPC, and identified through their energy deposit in the TPC, the time of flight in TOF, and, for pp collisions only (for the moment), through the transition radiation in the TRD. The contribution of electrons from the decay of heavy flavours was extracted from the inclusive electron spectrum by subtracting a cocktail simulation of the non heavy flavour electron sources (see [3] for details). The simulation is based on the measured distributions of π 0 in pp collisions and of π ± in Pb-Pb collisions.…”

Section: Analysis and Resultsmentioning

confidence: 99%

Heavy flavour measurements in Pb-Pb collisions at \sqrt s_{NN} = 2.76 TeV with the ALICE experiment

Stocco¹

2012

Proceedings of XXIst International Europhysics Conference on High Energy Physics — PoS(EPS-HEP2011)

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“…Light particles correspond to a low temperature emission, and heavy Advances in High Energy Physics 11 (a) (b) Figure 8: The spectrums of (a) Ξ and Ω as well as (b) inclusive electrons produced in inelastic p-p collision at 7 TeV. Experimental data measured by the ALICE Collaboration [15,18] are shown by the symbols. Results calculated by using the multicomponent Erlang distributions and the Lévy distributions are shown by the solid and dashed curves, respectively.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Comparing Multicomponent Erlang Distribution and Lévy Distribution of Particle Transverse Momentums

Wei

Chen

Gao

et al. 2014

Advances in High Energy Physics

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The transverse momentum spectrums of final-state products produced in nucleus-nucleus and proton-proton collisions at different center-of-mass energies are analyzed by using a multicomponent Erlang distribution and the Lévy distribution. The results calculated by the two models are found in most cases to be in agreement with experimental data from the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). The multicomponent Erlang distribution that resulted from a multisource thermal model seems to give a better description as compared with the Lévy distribution. The temperature parameters of interacting system corresponding to different types of final-state products are obtained. Light particles correspond to a low temperature emission, and heavy particles correspond to a high temperature emission. Extracted temperature from central collisions is higher than that from peripheral collisions.

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Inclusive electron spectrum from heavy-flavour decays in proton-proton collisions at measured with ALICE at LHC

Cited by 4 publications

References 5 publications

Jet-like correlations of heavy-flavor particles – from RHIC to LHC

Jet-like correlations of heavy-flavor particles – from RHIC to LHC

Heavy flavour measurements in Pb-Pb collisions at \sqrt s_{NN} = 2.76 TeV with the ALICE experiment

Comparing Multicomponent Erlang Distribution and Lévy Distribution of Particle Transverse Momentums

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