Measurement of the charged-hadron spectra and nuclear modification factor in lead-lead collisions with the ATLAS detector

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10369916" target="_blank" >RIV/00216208:11320/16:10369916 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.nuclphysbps.2016.05.073" target="_blank" >http://dx.doi.org/10.1016/j.nuclphysbps.2016.05.073</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nuclphysbps.2016.05.073" target="_blank" >10.1016/j.nuclphysbps.2016.05.073</a>

Result language
angličtina
Original language name
Measurement of the charged-hadron spectra and nuclear modification factor in lead-lead collisions with the ATLAS detector
Original language description
The ATLAS experiment at the Large Hadron Collider (LHC) measures charged hadron spectra obtained in 2010 and 2011 lead-lead LHC data taking periods with total integrated statistics of 0.15 nb(-1). The results are compared to the pp spectra of charged hadrons at the same centre-of-mass energy based on the data sample with integrated luminosity of 4.2 pb(-1) obtained by the ATLAS experiment in 2011 and 2013. This allows a detailed comparison of the two collision systems in a wide transverse momentum (0.5 < p(T) < 150 GeV) and pseudorapidity (vertical bar eta vertical bar < 2) ranges in different centrality intervals of Pb+Pb collision. The nuclear modification factor R-AA is presented in detail as a function of centrality, p(T) and eta. It shows a distinct p(T)-dependence with a pronounced minimum at about 7 GeV. Above 60 GeV, it is consistent with a flat, centrality-dependent, value within the uncertainties. The value is 0.55 +/- 0.01(stat.) +/- 0.04(syst.) in the most central collisions. The R-AA is observed to be consistent with flat vertical bar eta vertical bar dependence over the whole transverse momentum range in all centrality classes.
Czech name
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Czech description
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Project
<a href="/en/project/LG15052" target="_blank" >LG15052: Investigation of the Microworld using the CERN Infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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