Measuring K0SK±interactions using Pb–Pb collisions at √sNN=2.76TeV
ALICE Collaboration. (2017). Measuring K0SK±interactions using Pb–Pb collisions at √sNN=2.76TeV. Physics Letters B, 774, 64-77. doi:10.1016/j.physletb.2017.09.009
Published inPhysics Letters B
Rak, Jan |
© 2017 CERN, for the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
We present the first ever measurements of femtoscopic correlations between the K0 S and K± particles. The analysis was performed on the data from Pb–Pb collisions at √sNN = 2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a0(980) resonance. The extracted kaon source radius and correlation strength parameters for K0 SK− are found to be equal within the experimental uncertainties to those for K0 SK+. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a0 resonance are tested. Our results are also compatible with the interpretation of the a0 having a tetraquark structure instead of that of a diquark.