Direkt zur Hauptnavigation springen Direkt zum Inhalt springen
info(at)avldigital.remove-this.de
Deutsch English
Filtern nach
Aktive Filter
Letzte Suchanfragen

Ergebnisse für *

Zeige Ergebnisse 1 bis 14 von 14.

  1. Transverse sphericity of primary charged particles in minimum bias proton-proton collisions at sqrt(s)=0.9, 2.76 and 7 TeV
    Autor*in: Abelev, B.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Vernet, R.; Belikov, I.; Hippolyte, B.; Jangal, S.; Kuhn, C.; Maire, A.; Roy, C.; Sanchez Castro, X.; Senyukov, S.; Wan, R.; Aphecetche, Laurent; Batigne, Guillaume; Bregant, M.; Delagrange, H.; Driga, O.; Estienne, Magali; Germain, Marie; Lardeux, A.; Lefèvre, F.; Lenhardt, M.; Luquin, L.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Matyja, A.; Pillot, Philippe; Schutz, Y.; Shabetai, Alexandre; Stocco, Diego; Ahn, Sang Un; Baek, Y.W.; Baldit, A.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Ichou, R.; Lopez, X.; Manso, F.; Marchisone, M.; Porteboeuf-Houssais, S.; Rosnet, P.; Vulpescu, B.; Zhang, X.; Cheshkov, C.; Cheynis, B.; Ducroux, L.; Grossiord, J.-Y.; Guilbaud, Maxime; Tieulent, R.; Uras, A.; Zoccarato, Y.
    Erschienen: 2012
    Verlag:  HAL CCSD ; Springer Verlag (Germany)

    See paper for full list of authors - 21 pages, 11 figures ; Measurements of the sphericity of primary charged particles in minimum bias proton--proton collisions at sqrt(s)=0.9, 2.76 and 7 TeV with the ALICE detector at the LHC are presented. The... mehr

     

    See paper for full list of authors - 21 pages, 11 figures ; Measurements of the sphericity of primary charged particles in minimum bias proton--proton collisions at sqrt(s)=0.9, 2.76 and 7 TeV with the ALICE detector at the LHC are presented. The observable is linearized to be collinear safe and is measured in the plane perpendicular to the beam direction using primary charged tracks with $p_{\rm T}\geq0.5$ GeV/c in $|\eta|\leq0.8$. The mean sphericity as a function of the charged particle multiplicity at mid-rapidity ($N_{\rm ch}$) is reported for events with different $p_{\rm T}$ scales ("soft" and "hard") defined by the transverse momentum of the leading particle. In addition, the mean charged particle transverse momentum versus multiplicity is presented for the different event classes, and the sphericity distributions in bins of multiplicity are presented. The data are compared with calculations of standard Monte Carlo event generators. The transverse sphericity is found to grow with multiplicity at all collision energies, with a steeper rise at low $N_{\rm ch}$, whereas the event generators show the opposite tendency. The combined study of the sphericity and the mean $p_{\rm T}$ with multiplicity indicates that most of the tested event generators produce events with higher multiplicity by generating more back-to-back jets resulting in decreased sphericity (and isotropy). The PYTHIA6 generator with tune PERUGIA-2011 exhibits a noticeable improvement in describing the data, compared to the other tested generators.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 1434-6044 ; EISSN: 1434-6052 ; European Physical Journal C: Particles and Fields ; http://hal.in2p3.fr/in2p3-00699404 ; European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2012, 72, pp.2124. ⟨10.1140/epjc/s10052-012-2124-9⟩
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
  2. Measurement of prompt and non-prompt J/psi production cross sections at mid-rapidity in pp collisions at sqrt(s) = 7 TeV
    Autor*in: Abelev, B.; Aphecetche, Laurent; Baldisseri, A.; Batigne, Guillaume; Belikov, I.; Bergognon, A.A.E.; Borel, H.; Bregant, M.; Castillo Castellanos, J.; Charvet, J.L.; Cheshkov, C.; Cheynis, B.; Delagrange, H.; Driga, O.; Ducroux, L.; Estienne, Magali; Germain, Marie; Grossiord, J.-Y.; Guilbaud, Maxime; Hippolyte, B.; Jangal, S.; Kuhn, C.; Lardeux, A.; Lef'Evre, F.; Lenhardt, M.; Luquin, L.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Matyja, A.; Pal, S.; Pereira Da Costa, H.; Pillot, Philippe; Rakotozafindrabe, A.; Roy, C.; Sanchez Castro, X.; Schutz, Y.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Vernet, R.; Wan, R.; Yang, H.; Zoccarato, Y.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Ahn, Sang Un; Baek, Y.W.; Baldit, A.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Ichou, R.; Lopez, X.; Manso, F.; Marchisone, M.; Porteboeuf-Houssais, S.; Rosnet, P.; Vulpescu, B.; Zhang, X.
    Erschienen: 2012
    Verlag:  HAL CCSD ; Springer

    see paper for full list of authors ; The ALICE experiment at the LHC has studied J/psi production at mid-rapidity in pp collisions at {\surd}s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity L_int =... mehr

     

    see paper for full list of authors ; The ALICE experiment at the LHC has studied J/psi production at mid-rapidity in pp collisions at {\surd}s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity L_int = 5.6nb-1. The fraction of J/psi from the decay of long-lived beauty hadrons was determined for J/psi candidates with transverse momentum pt > 1.3 GeV/c and rapidity |y| < 0.9. The cross section for prompt J/psi mesons, i.e. directly produced J/psi and prompt decays of heavier charmonium states such as the Psi(2S) and Csi_c resonances, is sigma_prompt-J/psi(pt > 1.3 GeV/c, |y| < 0.9) = 7.2 +- 0.7(stat.) +- 1.0(syst.)+1.3-1.2 (syst.pol.) mb. The pt-differential cross section for prompt J/psi has also been measured. The cross section for the production of b-hadrons decaying to J/psi with transverse momentum greater than 1.3 GeV/c in the rapidity range |y| < 0.9 is sigma_{J/psi<-h_B} = 1.26 +- 0.33 (stat.) +0.23-0.28 (syst.) mb. The results are compared to QCD model predictions. The shape of the pt and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the bb pair total cross section and dsigma/dy at midrapidity.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 1126-6708 ; EISSN: 1029-8479 ; Journal of High Energy Physics ; http://hal.in2p3.fr/in2p3-00702009 ; Journal of High Energy Physics, Springer, 2012, 2012, pp.065. &#x27E8;10.1007/JHEP11(2012)065&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
  3. Measurement of charm production at central rapidity in proton-proton collisions at sqrt(s) = 2.76 TeV
    Autor*in: Abelev, B.; Vernet, R.; Belikov, I.; Hippolyte, B.; Jangal, S.; Kuhn, C.; Roy, C.; Sanchez Castro, X.; Senyukov, S.; Wan, R.; Aphecetche, Laurent; Batigne, Guillaume; Bergognon, E.; Bregant, M.; Delagrange, H.; Driga, O.; Estienne, Magali; Germain, Marie; Lardeux, A.; Lefèvre, F.; Lenhardt, M.; Luquin, L.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Matyja, A.; Pillot, Philippe; Schutz, y.; Shabetai, Alexandre; Stocco, Diego; Cheshkov, C.; Cheynis, B.; Ducroux, L.; Grossiord, J.-y.; Guilbaud, Maxime; Tieulent, R.; Uras, A.; Zoccarato, y.; Ahn, Sang Un; Baek, y.W.; Baldit, A.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Ichou, R.; Lopez, X.; Manso, F.; Marchisone, M.; Porteboeuf-Houssais, S.
    Erschienen: 2012
    Verlag:  HAL CCSD ; Springer

    See paper for full list of authors ; The pt-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D0, D+, and D*+ in the rapidity range |y|<0.5, and for transverse momentum 1< pt <12 GeV/c, were measured in... mehr

     

    See paper for full list of authors ; The pt-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D0, D+, and D*+ in the rapidity range |y|<0.5, and for transverse momentum 1< pt 12 GeV/c, were measured in proton-proton collisions at sqrt(s) = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays D0 -> K pi, D+ -> K pi pi, D*+ -> D0 pi, and their charge conjugates, and was performed on a L_{int} = 1.35 nb^{-1} event sample collected in 2011 with a minimum-bias trigger. The total charm production cross section at sqrt(s) = 2.76 TeV and at 7 TeV was evaluated by extrapolating to the full phase space the pt-differential production cross sections at sqrt(s) = 2.76 TeV and our previous measurements at sqrt(s) = 7 TeV. The results were compared to existing measurements and to perturbative-QCD calculations. The fraction of cubar D mesons produced in a vector state was also determined.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 1126-6708 ; EISSN: 1029-8479 ; Journal of High Energy Physics ; http://hal.in2p3.fr/in2p3-00705656 ; Journal of High Energy Physics, Springer, 2012, 7, pp.191. &#x27E8;10.1007/JHEP07(2012)191&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  4. K0s-K0s correlations in pp collisions at sqrt{s}=7 TeV from the LHC ALICE experiment
    Autor*in: Abelev, B.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Vernet, R.; Belikov, I.; Hippolyte, B.; Kuhn, C.; Roy, C.; Sanchez Castro, X.; Senyukov, S.; Aphecetche, Laurent; Batigne, Guillaume; Bergognon, E.; Bregant, M.; Delagrange, H.; Driga, O.; Estienne, Magali; Germain, Marie; Lardeux, A.; Lefèvre, F.; Lenhardt, M.; Luquin, L.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Matyja, A.; Pillot, Philippe; Schutz, Y.; Shabetai, Alexandre; Stocco, Diego; Ahn, Sang Un; Baek, Y.W.; Baldit, A.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Ichou, R.; Lopez, X.; Manso, F.; Marchisone, M.; Porteboeuf-Houssais, S.; Rosnet, P.; Vulpescu, B.
    Erschienen: 2012
    Verlag:  HAL CCSD ; Elsevier

    See paper for full list of authors - 10 pages + author list, 7 figures, to be submitted to Physics Letters B ; Identical neutral kaon pair correlations are measured in sqrt{s}=7 TeV pp collisions in the ALICE experiment. One-dimensional K0s-K0s... mehr

     

    See paper for full list of authors - 10 pages + author list, 7 figures, to be submitted to Physics Letters B ; Identical neutral kaon pair correlations are measured in sqrt{s}=7 TeV pp collisions in the ALICE experiment. One-dimensional K0s-K0s correlation functions in terms of the invariant momentum difference of kaon pairs are formed in two multiplicity and two transverse momentum ranges. The femtoscopic parameters for the radius and correlation strength of the kaon source are extracted. The fit includes quantum statistics and final-state interactions of the a0/f0 resonance. K0s-K0s correlations show an increase in radius for increasing multiplicity and a slight decrease in radius for increasing transverse mass, mT, as seen in pion-pion correlations in the pp system and in heavy-ion collisions. Transverse mass scaling is observed between the K0s-K0s and pion-pion radii. Also, the first observation is made of the decay of the f2'(1525) meson into the K0s-K0s channel in pp collisions.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 0370-2693 ; Physics Letters B ; https://hal.in2p3.fr/in2p3-00707149 ; Physics Letters B, Elsevier, 2012, 717, pp.151-161. &#x27E8;10.1016/j.physletb.2012.09.013&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  5. Long-range angular correlations on the near and away side in p-Pb collisions at sqrt(sNN) = 5.02 TeV
    Autor*in: Abelev, B.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Vernet, R.; Belikov, I.; Hippolyte, B.; Kuhn, C.; Molnar, L.; Roy, C.; Sanchez Castro, X.; Senyukov, S.; Aphecetche, Laurent; Batigne, Guillaume; Bergognon, E.; Bregant, M.; Delagrange, H.; Driga, O.; Erazmus, B.; Estienne, Magali; Germain, Marie; Lardeux, A.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Matyja, A.; Pillot, Philippe; Schutz, y.; Shabetai, Alexandre; Stocco, Diego; Cheshkov, C.; Cheynis, B.; Ducroux, L.; Guilbaud, Maxime; Tieulent, R.; Uras, A.; Zoccarato, y.; Baek, y.W.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Ichou, R.; Lopez, X.; Manso, F.
    Erschienen: 2013
    Verlag:  HAL CCSD ; Elsevier

    See paper for full list of authors - 22 pages, 5 figures, author list from page 16; submitted to PLB ; Angular correlations between charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon... mehr

     

    See paper for full list of authors - 22 pages, 5 figures, author list from page 16; submitted to PLB ; Angular correlations between charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5 < pT,assoc < pT,trig < 4 GeV/c. The correlations are measured over two units of pseudorapidity and full azimuthal angle in different intervals of event multiplicity, and expressed as associated yield per trigger particle. Two long-range ridge-like structures, one on the near side and one on the away side, are observed when the per-trigger yield obtained in low-multiplicity events is subtracted from the one in high-multiplicity events. The excess on the near-side is qualitatively similar to that recently reported by the CMS collaboration, while the excess on the away-side is reported for the first time. The two-ridge structure projected onto azimuthal angle is quantified with the second and third Fourier coefficients as well as by near-side and away-side yields and widths. The yields on the near side and on the away side are equal within the uncertainties for all studied event multiplicity and pT bins, and the widths show no significant evolution with event multiplicity or pT. These findings suggest that the near-side ridge is accompanied by an essentially identical away-side ridge.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 0370-2693 ; Physics Letters B ; http://hal.in2p3.fr/in2p3-00763590 ; Physics Letters B, Elsevier, 2013, 719, pp.29-41. &#x27E8;10.1016/j.physletb.2013.01.012&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  6. Charged kaon femtoscopic correlations in pp collisions at $\sqrt{s}=7$ TeV
    Autor*in: Abelev, B.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Vernet, R.; Belikov, I.; Hippolyte, B.; Kuhn, C.; Molnar, L.; Roy, C.; Sanchez Castro, X.; Senyukov, S.; Aphecetche, Laurent; Batigne, Guillaume; Bergognon, E.; Bregant, M.; Delagrange, H.; Driga, O.; Erazmus, B.; Estienne, Magali; Germain, Marie; Lardeux, A.; Mas, A.; Massacrier, L.; Matyja, A.; Pillot, Philippe; Schutz, Y.; Shabetai, Alexandre; Stocco, Diego; Cheshkov, C.; Cheynis, B.; Ducroux, L.; Guilbaud, Maxime; Uras, A.; Tieulent, R.; Zoccarato, Y.; Baek, Y.W.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Ichou, R.; Lopez, X.; Manso, F.; Marchisone, M.; Porteboeuf-Houssais, S.; Rosnet, P.; Vulpescu, B.; Zhang, X.
    Erschienen: 2013
    Verlag:  HAL CCSD ; American Physical Society

    See paper for full list of authors - 16 pages, 4 figures ; Correlations of two charged identical kaons (Kch Kch) are measured in pp collisions at sqrt{s}=7 TeV by the ALICE experiment at the Large Hadron Collider (LHC). One-dimensional Kch Kch... mehr

     

    See paper for full list of authors - 16 pages, 4 figures ; Correlations of two charged identical kaons (Kch Kch) are measured in pp collisions at sqrt{s}=7 TeV by the ALICE experiment at the Large Hadron Collider (LHC). One-dimensional Kch Kch correlation functions are constructed in three multiplicity and four transverse momentum ranges. The Kch Kch femtoscopic source parameters R and lambda are extracted. The Kch Kch correlations show a slight increase of femtoscopic radii with increasing multiplicity and a slight decrease of radii with increasing transverse momentum. These trends are similar to the ones observed for pi pi and Ks0 Ks0 correlations in pp and heavy-ion collisions. However, the observed one dimensional correlation radii for charged kaons are larger at high multiplicities than those for pions in contrast to what was observed in heavy-ion collisions at RHIC.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 1550-7998 ; EISSN: 1550-2368 ; Physical Review D ; http://hal.in2p3.fr/in2p3-00769524 ; Physical Review D, American Physical Society, 2013, 87, pp.052016. &#x27E8;10.1103/PhysRevD.87.052016&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  7. J/Psi Elliptic Flow in Pb-Pb Collisions at sqrt(sNN) = 2.76 TeV
    Autor*in: Abbas, E.; Aphecetche, Laurent; Baldisseri, A.; Batigne, Guillaume; Bergognon, A.A.E.; Bregant, M.; Castillo Castellanos, J.; Charvet, J.L.; Cheshkov, C.; Cheynis, B.; Delagrange, H.; Driga, O.; Ducroux, L.; Erazmus, B.; Estienne, Magali; Germain, Marie; Geuna, C.; Guilbaud, Maxime; Hippolyte, B.; Kuhn, C.; Lardeux, A.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Molnar, L.; Pereira da Costa, H.; Pillot, Philippe; Roy, C.; Sanchez Castro, X.; Schutz, Y.; Senyukov, S.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Vernet, R.; Yang, H.; Zoccarato, Y.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Baek, Y.W.; Barret, V.; Bastid, N.; Crochet, P.
    Erschienen: 2013
    Verlag:  HAL CCSD ; American Physical Society

    16 pages, 4 figures, 1 Table, authors from page 11 to 13 ; see paper for full list of authors ; We report on the first measurement of inclusive J/Psi elliptic flow, v2, in heavy-ion collisions at the LHC. The measurement is performed with the ALICE... mehr

     

    16 pages, 4 figures, 1 Table, authors from page 11 to 13 ; see paper for full list of authors ; We report on the first measurement of inclusive J/Psi elliptic flow, v2, in heavy-ion collisions at the LHC. The measurement is performed with the ALICE detector in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV in the rapidity range 2.5 < y < 4.0. The dependence of the J/Psi v2 on the collision centrality and on the J/Psi transverse momentum is studied in the range 0 <= pT < 10 GeV/c. For semi-central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV, an indication of non-zero v2 is observed with a maximum value of v2 = 0.116+/-0.046(stat.)+/-0.029(syst.) for J/Psi in the transverse momentum range 2 <= pT < 4 GeV/c. The elliptic flow measurement complements the previously reported ALICE results on the inclusive J/Psi nuclear modification factor and favors the scenario of a significant fraction of J/Psi production from charm quarks in a deconfined partonic phase.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 0031-9007 ; EISSN: 1079-7114 ; Physical Review Letters ; https://hal.in2p3.fr/in2p3-00804625 ; Physical Review Letters, American Physical Society, 2013, 111, pp.162301. &#x27E8;10.1103/PhysRevLett.111.162301&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  8. Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV
    Autor*in: Abbas, E.; Aphecetche, Laurent; Baldisseri, A.; Batigne, Guillaume; Belikov, I.; Bergognon, A.A.E.; Borel, H.; Bregant, M.; Castillo Castellanos, J.; Charvet, J.L.; Cheshkov, C.; Cheynis, B.; Delagrange, H.; Driga, O.; Ducroux, L.; Erazmus, B.; Estienne, Magali; Germain, Marie; Geuna, C.; Guilbaud, Maxime; Hippolyte, B.; Kuhn, C.; Lardeux, A.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Pereira da Costa, H.; Pillot, Philippe; Rakotozafindrabe, A.; Roy, C.; Sanchez Castro, X.; Schutz, y.; Senyukov, S.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Vernet, R.; yang, H.; Zoccarato, y.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Baek, y.W.; Barret, V.
    Erschienen: 2013
    Verlag:  HAL CCSD ; Elsevier

    21 pages, 9 captioned figures, 2 tables, authors from page 16 to page 18 ; see paper for full list of authors ; We present the first wide-range measurement of the charged-particle pseudorapidity density distribution, for different centralities (the... mehr

     

    21 pages, 9 captioned figures, 2 tables, authors from page 16 to page 18 ; see paper for full list of authors ; We present the first wide-range measurement of the charged-particle pseudorapidity density distribution, for different centralities (the 0-5%, 5-10%, 10-20%, and 20-30% most central events) in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV at the LHC. The measurement is performed using the full coverage of the ALICE detectors, -5.0 < eta < 5.5, and employing a special analysis technique based on collisions arising from LHC 'satellite' bunches. We present the pseudorapidity density as a function of the number of participating nucleons as well as an extrapolation to the total number of produced charged particles Nch = 17165 +/- 772 for the 0-5% most central collisions). From the measured dNch/deta distribution we derive the rapidity density distribution, dNch/dy, under simple assumptions. The rapidity density distribution is found to be significantly wider than the predictions of the Landau model, which reproduce data well at RHIC energies. We assess the validity of longitudinal scaling by comparing to lower energy results from RHIC. Finally the mechanisms of the underlying particle production are discussed based on a comparison with various theoretical models.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 0370-2693 ; Physics Letters B ; http://hal.in2p3.fr/in2p3-00806582 ; Physics Letters B, Elsevier, 2013, 726, pp.610-622. &#x27E8;10.1016/j.physletb.2013.09.022&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  9. Energy Dependence of the Transverse Momentum Distributions of Charged Particles in pp Collisions Measured by ALICE
    Autor*in: Abelev, B.; Aphecetche, Laurent; Baek, y.W.; Baldisseri, A.; Barret, V.; Bastid, N.; Batigne, Guillaume; Borel, H.; Bregant, M.; Charvet, J.L.; Cheynis, B.; Cheshkov, C.; Crochet, P.; Delagrange, H.; Ducroux, L.; Erazmus, B.; Estienne, Magali; Germain, Marie; Grossiord, J.-y.; Guilbaud, Maxime; Hippolyte, B.; Ichou, R.; Kuhn, C.; Lardeux, A.; Li, S.; Lopez, X.; Manso, F.; Marchisone, M.; Martin Blanco, J.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Molnar, L.; Pereira da Costa, H.; Pillot, Philippe; Porteboeuf-Houssais, S.; Rakotozafindrabe, A.; Rosnet, P.; Roy, C.; Sanchez Castro, X.; Schutz, y.; Senyukov, S.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Vernet, R.; Vulpescu, B.; Zhang, X.; Zoccarato, y.
    Erschienen: 2013
    Verlag:  HAL CCSD ; Springer Verlag (Germany)

    18 pages, 5 captioned figures, 1 table, authors from page 13 to page 18 ; see paper for full list of authors ; Differential cross sections of charged particles in inelastic pp collisions as a function of p_T have been measured at sqrt(s) = 0.9, 2.76... mehr

     

    18 pages, 5 captioned figures, 1 table, authors from page 13 to page 18 ; see paper for full list of authors ; Differential cross sections of charged particles in inelastic pp collisions as a function of p_T have been measured at sqrt(s) = 0.9, 2.76 and 7 TeV at the LHC. The p_T spectra are compared to NLO-pQCD calculations. Though the differential cross section for an individual sqrt(s) cannot be described by NLO-pQCD, the relative increase of cross section with sqrt(s) is in agreement with NLO-pQCD. Based on these measurements and observations, procedures are discussed to construct pp reference spectra at sqrt(s) = 2.76 and 5.02 TeV up to p_T = 50 GeV/c as required for the calculation of the nuclear modification factor in nucleus-nucleus and proton-nucleus collisions.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 1434-6044 ; EISSN: 1434-6052 ; European Physical Journal C: Particles and Fields ; http://hal.in2p3.fr/in2p3-00841160 ; European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2013, 73, pp.2662. &#x27E8;10.1140/epjc/s10052-013-2662-9&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  10. Multiplicity dependence of the average transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC
    Autor*in: Abelev, B.; Aphecetche, Laurent; Baek, Y.W.; Baldisseri, A.; Barret, V.; Bastid, N.; Batigne, Guillaume; Borel, H.; Bregant, M.; Charvet, J.L.; Cheynis, B.; Cheshkov, C.; Crochet, P.; Delagrange, H.; Ducroux, L.; Erazmus, B.; Estienne, Magali; Germain, Marie; Grossiord, J.-Y.; Guilbaud, Maxime; Hippolyte, B.; Ichou, R.; Kuhn, C.; Lardeux, A.; Li, S.; Lopez, X.; Manso, F.; Marchisone, M.; Martin Blanco, J.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Molnar, L.; Pereira da Costa, H.; Pillot, Philippe; Porteboeuf-Houssais, S.; Rakotozafindrabe, A.; Rosnet, P.; Roy, C.; Sanchez Castro, X.; Schutz, Y.; Senyukov, S.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Vernet, R.; Vulpescu, B.; Zhang, X.; Zoccarato, Y.
    Erschienen: 2013
    Verlag:  HAL CCSD ; Elsevier

    18 pages, 4 captioned figures, 2 tables, author from page 13 to page 18 ; see paper for full list of authors ; The average transverse momentum versus the charged-particle multiplicity N_ch was measured in p-Pb collisions at a collision energy per... mehr

     

    18 pages, 4 captioned figures, 2 tables, author from page 13 to page 18 ; see paper for full list of authors ; The average transverse momentum versus the charged-particle multiplicity N_ch was measured in p-Pb collisions at a collision energy per nucleon-nucleon pair sqrt(s_NN) = 5.02 TeV and in pp collisions at collision energies of sqrt(s) = 0.9, 2.76, and 7 Tev in the kinematic range 0.15 < p_T < 10.0 Gev/c and |eta| < 0.3 with the ALICE apparatus at the LHC. These data are compared to results in Pb-Pb collisions at sqrt(s_NN) = 2.76 Tev at similar charged-particle multiplicities. In pp and p-Pb collisions, a strong increase of with N_ch is observed, which is much stronger than that measured in Pb-Pb collisions. For pp collisions, this could be attributed, within a model of hadronizing strings, to multiple-parton interactions and to a final-state color reconnection mechanism. The data in p-Pb and Pb-Pb collisions cannot be described by an incoherent superposition of nucleon-nucleon collisions and pose a challenge to most of the event generators.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 0370-2693 ; Physics Letters B ; https://hal.in2p3.fr/in2p3-00841162 ; Physics Letters B, Elsevier, 2013, 727, pp.371-380. &#x27E8;10.1016/j.physletb.2013.10.054&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  11. Long-range angular correlations of pi, K and p in p--Pb collisions at sqrt(s_NN) = 5.02 TeV
    Autor*in: Abelev, B.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Vernet, R.; Belikov, I.; Hippolyte, B.; Kuhn, C.; Molnar, L.; Roy, C.; Sanchez Castro, X.; Aphecetche, Laurent; Batigne, Guillaume; Bergognon, E.; Bregant, M.; Delagrange, H.; Erazmus, B.; Estienne, Magali; Germain, Marie; Lardeux, A.; Martinez Garcia, Gines; Martin Blanco, J.; Mas, A.; Massacrier, L.; Pillot, Philippe; Schutz, y.; Shabetai, Alexandre; Stocco, Diego; Cheshkov, C.; Cheynis, B.; Ducroux, L.; Guilbaud, Maxime; Tieulent, R.; Uras, A.; Zoccarato, y.; Baek, y.W.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Ichou, R.; Li, S.; Lopez, X.; Manso, F.; Marchisone, M.
    Erschienen: 2013
    Verlag:  HAL CCSD ; Elsevier

    See paper for full list of authors - 26 pages, 4 captioned figures, 2 tables, Author from page 20 to page 23 ; Angular correlations between unidentified charged trigger particles and various species of charged associated particles (unidentified... mehr

     

    See paper for full list of authors - 26 pages, 4 captioned figures, 2 tables, Author from page 20 to page 23 ; Angular correlations between unidentified charged trigger particles and various species of charged associated particles (unidentified particles, pions, kaons, protons and antiprotons) are measured by the ALICE detector in p-Pb collisions at a nucleon--nucleon centre-of-mass energy of 5.02 TeV in the transverse-momentum range 0.3 < p_T < 4 GeV/c. The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range |eta_lab|<0.8. Fourier coefficients are extracted from the long-range correlations projected onto the azimuthal angle difference and studied as a function of $\pt$ and in intervals of event multiplicity. In high-multiplicity events, the second-order coefficient for protons, v_2^p, is observed to be smaller than that for pions, v_2^pi, up to about p_T = 2 GeV/c. To reduce correlations due to jets, the per-trigger yield measured in low-multiplicity events is subtracted from that in high-multiplicity events. A two-ridge structure is obtained for all particle species. The Fourier decomposition of this structure shows that the second-order coefficients for pions and kaons are similar. The v_2^p is found to be smaller at low p_T and larger at higher p_T than v_2^pi, with a crossing occurring at about 2 GeV. This is qualitatively similar to the elliptic-flow pattern observed in heavy-ion collisions. A mass ordering effect at low transverse momenta is consistent with expectations from hydrodynamic model calculations assuming a collectively expanding system.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 0370-2693 ; Physics Letters B ; http://hal.in2p3.fr/in2p3-00843893 ; Physics Letters B, Elsevier, 2013, 726, pp.164-177. &#x27E8;10.1016/j.physletb.2013.08.024&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  12. J/psi production and nuclear effects in p-Pb collisions at sqrt(sNN)=5.02 TeV
    Autor*in: Abelev, B.; Aphecetche, Laurent; Baek, Y.W.; Baldisseri, A.; Barret, V.; Bastid, N.; Belikov, I.; Bergognon, A.A.E.; Borel, H.; Bregant, M.; Castillo Castellanos, J.; Charvet, J.L.; Cheshkov, C.; Cheynis, B.; Crochet, P.; Delagrange, H.; Ducroux, L.; Dupieux, P.; Erazmus, B.; Estienne, Magali; Germain, Marie; Grossiord, J.-Y.; Guilbaud, Maxime; Lardeux, A.; Li, S.; Lopez, X.; Manso, F.; Marchisone, M.; Martinez Garcia, Gines; Martin Blanco, J.; Mas, A.; Massacrier, L.; Molnar, L.; Pereira da Costa, H.; Pillot, Philippe; Porteboeuf-Houssais, S.; Rakotozafindrabe, A.; Rosnet, P.; Roy, C.; Sanchez Castro, X.; Schutz, Y.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Vernet, R.; Vulpescu, B.; Yang, H.; Zhang, X.; Zoccarato, Y.
    Erschienen: 2014
    Verlag:  HAL CCSD ; Springer

    Comments: 20 pages, 6 captioned figures, 0 tables, authors from page 15 to page 17 ; see paper for full list of authors ; Inclusive J/psi production has been studied with the ALICE detector in p-Pb collisions at sqrt(sNN) = 5.02 TeV at the CERN LHC,... mehr

     

    Comments: 20 pages, 6 captioned figures, 0 tables, authors from page 15 to page 17 ; see paper for full list of authors ; Inclusive J/psi production has been studied with the ALICE detector in p-Pb collisions at sqrt(sNN) = 5.02 TeV at the CERN LHC, in the rapidity domains 2.03 < ycms < 3.53 and -4.46 < ycms < -2.96, down to zero transverse momentum. The J/psi measurement is performed in the Muon Spectrometer through the mu+ mu- decay mode. In this paper, the J/psi production cross section and the nuclear modification factor R(pPb) for the rapidities under study are presented. While at forward rapidity, corresponding to the proton direction, a suppression of the J/psi yield with respect to binary-scaled pp collisions is observed, in the backward region no suppression is present. The ratio of the forward and backward yields is also shown differentially in rapidity and transverse momentum. Theoretical predictions based on nuclear shadowing, as well as on models including, in addition, a contribution from partonic energy loss, are in fair agreement with the experimental results.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 1126-6708 ; EISSN: 1029-8479 ; Journal of High Energy Physics ; https://hal.in2p3.fr/in2p3-00856719 ; Journal of High Energy Physics, Springer, 2014, 2, pp.073. &#x27E8;10.1007/JHEP02(2014)073&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  13. Centrality, rapidity and transverse momentum dependence of J/Psi suppression in Pb-Pb collisions at sqrt(sNN)=2.76TeV
    Autor*in: Abelev, B.; Aphecetche, Laurent; Baek, y.W.; Bastid, N.; Batigne, Guillaume; Bergognon, A.A.E.; Bregant, M.; Cheshkov, C.; Cheynis, B.; Crochet, P.; Delagrange, H.; Ducroux, L.; Dupieux, P.; Erazmus, B.; Germain, Marie; Grossiord, J.-y.; Guilbaud, Maxime; Hippolyte, B.; Ianigro, J.-C.; Kuhn, C.; Lardeux, A.; Li, S.; Lopez, X.; Manso, F.; Marchisone, M.; Mart'Nez Garcia, G.; Martin Blanco, J.; Mas, A.; Morreale, A.; Pillot, Philippe; Porteboeuf-Houssais, S.; Ronflette, L.; Rosnet, P.; Roy, C.; Sanchez Castro, X.; Schutz, y.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Valencia Palomo, L.; Vernet, R.; Vulpescu, B.; Wang, M.; Zhang, X.; Zoccarato, y.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.
    Erschienen: 2014
    Verlag:  HAL CCSD ; Elsevier

    20 pages, 5 captioned figures, 2 tables, authors from page 15 to page 17 ; see paper for full list of authors ; The inclusive J/Psi nuclear modification factor Raa in Pb-Pb collisions at sqrt(sNN)=2.76TeV has been measured by ALICE as a function of... mehr

     

    20 pages, 5 captioned figures, 2 tables, authors from page 15 to page 17 ; see paper for full list of authors ; The inclusive J/Psi nuclear modification factor Raa in Pb-Pb collisions at sqrt(sNN)=2.76TeV has been measured by ALICE as a function of centrality in the e+e- decay channel at mid-rapidity |y| < 0.8 and as a function of centrality, transverse momentum and rapidity in the u+u- decay channel at forward-rapidity 2.5 < y < 4.The J/Psi yields measured in Pb-Pb are suppressed compared to those in pp collisions scaled by the number of binary collisions.The Raa integrated over a centrality range corresponding to 90% of the inelastic Pb-Pb cross section is 0.72 +- 0.06 (stat.) +- 0.10 (syst.) at mid-rapidity and 0.57 +- 0.01 (stat.) +- 0.09 (syst.) at forward-rapidity.At low transverse momentum, significantly larger values of Raa are measured at forward-rapidity compared to measurements at lower energy.These features suggest that a contribution to the J/Psi yield originates from charm quarks (re)combination in the deconfined partonic medium.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 0370-2693 ; Physics Letters B ; http://hal.in2p3.fr/in2p3-00879452 ; Physics Letters B, Elsevier, 2014, 734, pp.314-327. &#x27E8;10.1016/j.physletb.2014.05.064&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
  14. Measurement of quarkonium production at forward rapidity in pp collisions at sqrt{s}= 7 TeV
    Autor*in: Abelev, B.; Aphecetche, Laurent; Batigne, Guillaume; Cheshkov, C.; Cheynis, B.; Delagrange, H.; Ducroux, L.; Erazmus, B.; Estienne, Magali; Germain, Marie; Grossiord, J.-y.; Guilbaud, Maxime; Hippolyte, B.; Kuhn, C.; Lardeux, A.; Martinez Garcia, Gines; Mas, A.; Massacrier, L.; Morreale, A.; Pillot, Philippe; Ronflette, L.; Roy, C.; Sanchez Castro, X.; Schutz, y.; Shabetai, Alexandre; Stocco, Diego; Tieulent, R.; Uras, A.; Vernet, R.; Wang, M.; Zhu, J.; Zoccarato, y.; Arbor, N.; Conesa Balbastre, G.; Faivre, J.; Furget, C.; Guernane, R.; Kox, S.; Real, J.S.; Silvestre, C.; Baek, y.W.; Barret, V.; Bastid, N.; Crochet, P.; Dupieux, P.; Li, S.; Lopez, X.; Manso, F.; Marchisone, M.; Porteboeuf-Houssais, S.
    Erschienen: 2014
    Verlag:  HAL CCSD ; Springer Verlag (Germany)

    27 pages, 9 captioned figures, 6 tables, authors from page 22 to page 24 ; see paper for full list of authors ; The inclusive production cross sections at forward rapidity of J/psi, psi(2S), Upsilon(1S) and Upsilon(2S) are measured in pp collisions... mehr

     

    27 pages, 9 captioned figures, 6 tables, authors from page 22 to page 24 ; see paper for full list of authors ; The inclusive production cross sections at forward rapidity of J/psi, psi(2S), Upsilon(1S) and Upsilon(2S) are measured in pp collisions at sqrt{s} = 7 TeV with the ALICE detector at the LHC. The analysis is based in a data sample corresponding to an integrated luminosity of 1.35 pb^-1. Quarkonia are reconstructed in the dimuon-decay channel and the signal yields are evaluated by fitting the mu+mu- invariant mass distributions. The differential production cross sections are measured as a function of the transverse momentum pt and rapidity y, over the ranges 0 < pt < 20 GeV/c for J/psi, 0 < pt < 12 GeV/c for all other resonances and for 2.5 < y < 4. The measured cross sections integrated over pt and y, and assuming unpolarized quarkonia, are: sigma_{J/psi} = 6.69 +- 0.04 +- 0.63 microbarn, sigma_{psiprime} = 1.13 +- 0.07 +- 0.14 microbarn, sigma_{Upsilon(1S)} = 54.2 +- 5.0 +- 6.7 nb and sigma_{Upsilon(2S)} = 18.4 +- 3.7 +- 2.2 nb, where the first uncertainty is statistical and the second one is systematic. The results are compared to measurements performed by other LHC experiments and to theoretical models.

     
    Export in Literaturverwaltung   RIS-Format
      BibTeX-Format
    Quelle: BASE Fachausschnitt AVL
    Sprache: Englisch
    Medientyp: Aufsatz aus einer Zeitschrift
    Format: Online
    Übergeordneter Titel: ISSN: 1434-6044 ; EISSN: 1434-6052 ; European Physical Journal C: Particles and Fields ; http://hal.in2p3.fr/in2p3-00959806 ; European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2014, 74, pp.2974. &#x27E8;10.1140/epjc/s10052-014-2974-4&#x27E9;
    Schlagworte: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]