Measurement of electrons from beauty-hadron decays in p-Pb collisions at √sNN=5.02 TeV and Pb-Pb collisions at √sNN=2.76 TeV
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http://hdl.handle.net/10347/22491
Título: | Measurement of electrons from beauty-hadron decays in p-Pb collisions at √sNN=5.02 TeV and Pb-Pb collisions at √sNN=2.76 TeV
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Autor/a: | ALICE Collaboration
González Ferreiro, Elena
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Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE)
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Palabras chave: | Heavy Ion Experiments | |
Data: | 2017
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Editor: | Springer
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Cita bibliográfica: | Adam, J., Adamová, D., Aggarwal, M. et al. Measurement of electrons from beauty-hadron decays in p-Pb collisions at √sNN=5.02 TeV and Pb-Pb collisions at √sNN=2.76 TeV. J. High Energ. Phys. 2017, 52 (2017). https://doi.org/10.1007/JHEP07(2017)052
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Resumo: | The production of beauty hadrons was measured via semi-leptonic decays at
mid-rapidity with the ALICE detector at the LHC in the transverse momentum interval
1 < pT < 8 GeV/c in minimum-bias p-Pb collisions at
p
sNN = 5:02TeV and in 1:3 < pT <
8 GeV/c in the 20% most central Pb-Pb collisions at
p
sNN = 2:76TeV. The pp reference
spectra at
p
s = 5:02TeV and
p
s = 2:76TeV, needed for the calculation of the nuclear
modi cation factors RpPb and RPbPb, were obtained by a pQCD-driven scaling of the cross
section of electrons from beauty-hadron decays measured at
p
s = 7TeV. In the pT interval
3 < pT < 8 GeV/c, a suppression of the yield of electrons from beauty-hadron decays is
observed in Pb-Pb compared to pp collisions. Towards lower pT, the RPbPb values increase
with large systematic uncertainties. The RpPb is consistent with unity within systematic
uncertainties and is well described by theoretical calculations that include cold nuclear
matter e ects in p-Pb collisions. The measured RpPb and these calculations indicate that
cold nuclear matter e ects are small at high transverse momentum also in Pb-Pb collisions.
Therefore, the observed reduction of RPbPb below unity at high pT may be ascribed to an
e ect of the hot and dense medium formed in Pb-Pb collisions. |
Versión do editor: | https://doi.org/10.1007/JHEP07(2017)052 |
URI: | http://hdl.handle.net/10347/22491
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DOI: | 10.1007/JHEP07(2017)052 |
ISSN: | 1029-8479
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Dereitos: | © CERN, for the benefit of the ALICE Collaboration. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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