# Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

19-24 May 2014
Europe/Zurich timezone

## Bose-Einstein correlation measurements at CMS

21 May 2014, 11:10
20m

### europium

Contributed Talk Correlations and Fluctuations

### Speaker

Multidimensional and one-dimensional quantum-statistical (Bose-Einstein) correlations are measured in proton-proton collisions at 0.9, 2.76 and 7 TeV, and in proton-lead collisions at 5.02 TeV/nucleon pair center-of-mass energy with the CMS detector at the LHC. The correlation functions are extracted in terms of different components of the relative momentum of the pair, in order to investigate the extension of the emission source in different directions. The results are presented for different intervals of transverse pair momentum, $k_T$, and charged particle multiplicity of the collision, $N_{ch}$, as well as for their integrated values. Besides inclusive charged particles, charged pions and kaons, identified via their energy loss in the silicon tracker detector, can also be correlated. The extracted source radii are reaching the highest values for very high multiplicity pPb collisions, and decrease with increasing $k_T$. The results open the possibility to study scaling and factorization properties of these radii as a function of multiplicity, $k_T$, colliding system size and center-of-mass energy.