Bose-Einstein correlations with identified particles in CMS

May 20, 2014, 4:30 PM
spectrum (darmstadtium)



Board: I-38
Poster Correlations and Fluctuations Poster session


Ferenc Siklér (Wigner RCP, Budapest (HU))


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

Primary author

Ferenc Siklér (Wigner RCP, Budapest (HU))

Presentation materials