XI Workshop on Particle Correlations and Femtoscopy

K0sKch femtoscopy in Pb-Pb collisions at sqrt(s)=2.76 TeV from the LHC ALICE experiment

4 Nov 2015, 11:10

25m

Main Auditorium (Centre for Innovation and Technology Transfer Management, Warsaw University of Technology)

Session 5

Speaker

Thomas Humanic (Ohio State University (US))

Description

Femtoscopic correlations with the particle pair combinations K$^0_{\rm S}$K$^{\rm \pm}$ are studied for the first time. This method has been applied to Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV by the LHC ALICE experiment. Correlations in the K$^0_{\rm S}$K$^{\rm \pm}$ pairs are produced by final-state interactions which proceed through the a$_{\rm 0}$(980) resonance. It is found that the a$_{\rm 0}$ final-state interaction describes the shape of the measured K$^0_{\rm S}$K$^{\rm \pm}$ correlation functions well. The extracted radius parameter for K$^0_{\rm S}$K$^{\rm -}$ is found to be equal to that for K$^0_{\rm S}$K$^{\rm +}$ within the errors of the present measurement. Comparing the results of the present study with those from identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a$_{\rm 0}$ resonance are constrained and the branching ratio of non-resonance to resonance final-state interactions for K$^0_{\rm S}$K$^{\rm \pm}$ is estimated.

Presentation materials

2015-Oct-30-conferencefile-humanic_WPCF15v4.pdf