Speaker
Ferenc Siklér
(Wigner RCP, Budapest (HU))
Description
Short range correlations of identified charged hadrons in pp ($\sqrt{s}$ = 0.9, 2.76, and 7 TeV), pPb ($\sqrt{s_{NN}}$ = 5.02 TeV), and peripheral PbPb collisions ($\sqrt{s_{NN}}$ = 2.76 TeV) are studied with the CMS detector at the LHC. Charged pions, kaons, and protons at low $p_T$ and in laboratory pseudorapidity $|\eta| < 1$ are identified via their energy loss in the silicon tracker. The two-particle correlation functions show effects of quantum statistics, Coulomb interaction, and also indicate the role of multi-body resonance decays and mini-jets. The characteristics of the one-, two-, and three-dimensional correlation functions are studied as a function of pair momentum and the charged-particle multiplicity of the event. The extracted radii are in the range 1-5 fm, reaching highest values for very high multiplicity pPb, also for similar multiplicity PbPb collisions, and decrease with increasing $k_{T}$. The dependence of radii on multiplicity and $k_{T}$ largely factorizes and appears to be insensitive to the type of the colliding system and center-of-mass energy.
| On behalf of collaboration: | CMS |
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Author
Ferenc Siklér
(Wigner RCP, Budapest (HU))
