Production of charged pions, kaons and protons at large transverse momenta in pp and Pb-Pb collisions at sqrt(sNN) = 2.76 TeV
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Laurent Aphecetche
- Function : Author
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Guillaume Batigne
- Function : Author
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- IdHAL : guillaume-batigne
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- IdRef : 077207874
B. Cheynis
- Function : Author
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- IdHAL : brigitte-cheynis
- IdRef : 032215606
Magali Estienne
- Function : Author
- PersonId : 179790
- IdHAL : magali-estienne
- ORCID : 0000-0003-0687-5580
Marie Germain
- Function : Author
- PersonId : 170960
- IdHAL : marie-germain
- ORCID : 0000-0001-7382-1609
- IdRef : 176579958
Maxime Guilbaud
- Function : Author
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- IdHAL : maxime-guilbaud
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- IdRef : 236157566
Gines Martinez Garcia
- Function : Author
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- IdHAL : gines-martinez
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- IdRef : 068952961
Philippe Pillot
- Function : Author
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- IdHAL : ppillot
- ORCID : 0000-0002-9067-0803
C. Roy
- Function : Author
- PersonId : 742351
- IdHAL : christelle-roy
- ORCID : 0000-0001-5920-6271
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
G. Conesa Balbastre
- Function : Author
- PersonId : 737477
- IdHAL : conesa-balbastre-gustavo
- ORCID : 0000-0001-5283-3520
J.S. Real
- Function : Author
- PersonId : 737490
- IdHAL : jean-sebastien-real
- ORCID : 0000-0003-1584-783X
- IdRef : 156873133
A Rakotozafindrabe
- Function : Author
- PersonId : 903862
Abstract
Transverse momentum spectra of Pi+/-, K+/- and p(anti-p) up to pT = 20 GeV/c at mid-rapidity, |y| ~< 0.8, in pp and Pb-Pb collisions at sqrt(sNN) = 2.76 TeV have been measured using the ALICE detector at the LHC. At intermediate pT (2-8 GeV/c) an enhancement of the proton-to-proton ratio, (p + anti-p)/(Pi+ + Pi-), with respect to pp collisions is observed and the ratio reaches ~0.80 in central Pb-Pb collisions. The measurement of the nuclear modification factors for Pi+/-, K+/- and p(anti-p) indicates that within the systematic and statistical uncertainties they are the same at high pT (> 10 GeV/c), suggesting that the chemical composition of leading particles from jets in the medium is similar to that of vacuum jets.