Measurement of prompt D-meson production in p-Pb collisions at sqrt(sNN) = 5.02 TeV
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B. Abelev
- Function : Author
G. Conesa Balbastre
- Function : Author
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J.S. Real
- Function : Author
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- IdHAL : jean-sebastien-real
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- IdRef : 156873133
C. Roy
- Function : Author
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- IdHAL : christelle-roy
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Laurent Aphecetche
- Function : Author
- PersonId : 2010
- IdHAL : laurent-aphecetche
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- IdRef : 113847653
Guillaume Batigne
- Function : Author
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- IdHAL : guillaume-batigne
- ORCID : 0000-0001-8638-6300
- IdRef : 077207874
Magali Estienne
- Function : Author
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- IdHAL : magali-estienne
- ORCID : 0000-0003-0687-5580
Marie Germain
- Function : Author
- PersonId : 170960
- IdHAL : marie-germain
- ORCID : 0000-0001-7382-1609
- IdRef : 176579958
Gines Martinez Garcia
- Function : Author
- PersonId : 169952
- IdHAL : gines-martinez
- ORCID : 0000-0002-8657-6742
- IdRef : 068952961
Philippe Pillot
- Function : Author
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- IdHAL : ppillot
- ORCID : 0000-0002-9067-0803
Alexandre Shabetai
- Function : Author
- PersonId : 181202
- IdHAL : alexandre-shabetai
- ORCID : 0000-0003-3069-726X
Diego Stocco
- Function : Author
- PersonId : 170966
- IdHAL : diego-stocco
- ORCID : 0000-0002-5377-5163
- IdRef : 204479150
B. Cheynis
- Function : Author
- PersonId : 750577
- IdHAL : brigitte-cheynis
- IdRef : 032215606
Maxime Guilbaud
- Function : Author
- PersonId : 177174
- IdHAL : maxime-guilbaud
- ORCID : 0000-0001-5990-482X
- IdRef : 236157566
Abstract
The pt-differential production cross sections of the prompt charmed mesons D0, D+, D*+ and Ds+ and their charge conjugate in the rapidity interval -0.96 < y_cms < 0.04 were measured in p-Pb collisions at a centre-of-mass energy sqrt(sNN) = 5.02 TeV with the ALICE detector at the LHC. The nuclear modification factor R_pPb, quantifying the D-meson yield in p--Pb collisions relative to the yield in pp collisions scaled by the number of binary nucleon-nucleon collisions, is compatible within the 15-20% uncertainties with unity in the transverse momentum interval 1 < pt < 24 GeV/c. No significant difference among the R_pPb of the four D-meson species is observed. The results are described within uncertainties by theoretical calculations that include initial-state effects. The measurement adds experimental evidence that the modification of the momentum spectrum of D mesons observed in Pb-Pb collisions with respect to pp collisions is due to strong final-state effects induced by hot partonic matter.