Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider
The production of (anti-)deuteron and (anti-)3He nuclei in Pb-Pb collisions at √sNN=2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that thi...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
29 February 2016
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| In: |
Physical review
Year: 2016, Jahrgang: 93, Heft: 2 |
| ISSN: | 2469-9993 |
| DOI: | 10.1103/PhysRevC.93.024917 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.93.024917 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.93.024917 
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| Verfasserangaben: | J. Adam et al.* (ALICE Collaboration) |
MARC
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| 245 | 1 | 0 | |a Production of light nuclei and anti-nuclei in pp and Pb-Pb collisions at energies available at the CERN Large Hadron Collider |c J. Adam et al.* (ALICE Collaboration) |
| 246 | 3 | 3 | |a Production of light nuclei and anti-nuclei in proton-proton and Pb-Pb collisions at energies available at the CERN Large Hadron Collider |
| 264 | 1 | |c 29 February 2016 | |
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| 500 | |a ALICE Collaboration: J. Adam, V. Anguelov, O. Busch, A. Deisting, M.G. Fleck, P. Glaessel, M.L. Knichel, L. Leardini, J. Mercado Perez, K. Oyama, Y. Pachmayer, K. Reygers, R. Schicker, J. Stachel, J. Stiller, M.A. Voelkl, J. Wilkinson, B. Windelband, M. Winn, A. Zimmermann [und 961 weitere Personen] | ||
| 500 | |a Gesehen am 21.07.2020 | ||
| 520 | |a The production of (anti-)deuteron and (anti-)3He nuclei in Pb-Pb collisions at √sNN=2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, 3He/d and 3He/p, in Pb-Pb collisions are found to be in agreement with a common chemical freeze-out temperature of Tchem≈156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb-Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at √s=7 TeV is also presented. While the p/π ratio is similar in pp and Pb-Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb-Pb collisions. | ||
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