ATLAS results on heavy flavour production and its relation to quark matter

15th International Conference on Strangeness in Quark Matter

Donadelli, Marisilvia^1

University of Sao Paulo, Brazil^1

关键词: Centre-of-mass energies;    Differential cross section;    Integrated luminosity;    Lead collisions;    Nuclear modification factors;    Nucleon-nucleon interaction;    Proton proton collisions;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012011/pdf
DOI  :  10.1088/1742-6596/668/1/012011

来源: IOP

【 摘 要 】

We present measurements of J/ψ and ψ (2S) production in proton-lead collisions at a centre of mass energy per nucleon-nucleon interaction of √sNN = 5.02 TeV and in proton- proton collisions at √s = 2.76 TeV, with integrated luminosities of 28.1 nb-1 and 4.0 pb-1, respectively. Both measurements are based on data recorded by the ATLAS detector in 2013 and are performed in the dimuon decay channel. Prompt components of J/ψ and ψ(2S) are separated from the nonprompt components resulting from b-hadron decays through an analysis of the distance between the J/ψ and ψ(2S) decay vertexes and the event primary vertex. The measurements of nuclear modification factors and self-normalized yields for the J/ψ and ψ(2S) are performed in the following ranges: 8.5 TμμTμμμμ