ALICE CollaborationGonzález Ferreiro, Elena2020-05-202020-05-202017Acharya, S., Adamová, D., Adolfsson, J., Aggarwal, M. M., Rinella, G. A., Agnello, M., ... & Aiola, S. (2017). Measuring K0SK± interactions using Pb–Pb collisions at √sNN=2.76 TeV. Physics Letters B, 774, 64-770370-2693http://hdl.handle.net/10347/22474We present the first ever measurements of femtoscopic correlations between the K0Sand K±particles. The analysis was performed on the data from Pb–Pb collisions at √sNN=2.76TeV 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 K0SK−are found to be equal within the experimental uncertainties to those for K0SK+. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a0resonance are tested. Our results are also compatible with the interpretation of the a0having a tetraquark structure instead of that of a diquark.eng©2017 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.http://creativecommons.org/licenses/by/4.0/journal article10.1016/j.physletb.2017.09.0091873-2445open access