One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at $\sqrt{s_{\rm {NN}}}$ =2.76 TeV

Abstract : The size of the particle emission region in high-energy collisions can be deduced using the femtoscopic correlations of particle pairs at low relative momentum. Such correlations arise due to quantum statistics and Coulomb and strong final state interactions. In this paper, results are presented from femtoscopic analyses of $\pi^{\pm}\pi^{\pm}$, ${\rm K}^{\pm}{\rm K}^{\pm}$, ${\rm K}^{0}_S{\rm K}^{0}_S$, ${\rm pp}$, and ${\rm \overline{p}}{\rm \overline{p}}$ correlations from Pb-Pb collisions at $\sqrt{s_{\mathrm {NN}}}=2.76$ TeV by the ALICE experiment at the LHC. One-dimensional radii of the system are extracted from correlation functions in terms of the invariant momentum difference of the pair. The comparison of the measured radii with the predictions from a hydrokinetic model is discussed. The pion and kaon source radii display a monotonic decrease with increasing average pair transverse mass $m_{\rm T}$ which is consistent with hydrodynamic model predictions for central collisions. The kaon and proton source sizes can be reasonably described by approximate $m_{\rm T}$-scaling.
Type de document :
Article dans une revue
Physical Review C, American Physical Society, 2015, 92, pp.054908. 〈10.1103/PhysRevC.92.054908〉
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http://hal.in2p3.fr/in2p3-01172185
Contributeur : Emmanuelle Vernay <>
Soumis le : mardi 7 juillet 2015 - 09:22:11
Dernière modification le : mardi 19 juin 2018 - 01:19:55

Citation

J. Adam, G. Conesa Balbastre, J. Faivre, C. Furget, R. Guernane, et al.. One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at $\sqrt{s_{\rm {NN}}}$ =2.76 TeV. Physical Review C, American Physical Society, 2015, 92, pp.054908. 〈10.1103/PhysRevC.92.054908〉. 〈in2p3-01172185〉

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