Measuring K 0 SK ± interactions using Pb – Pb collisions at √

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semanticscholar（2017）

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摘要

Article history: Received 22 May 2017 Received in revised form 24 August 2017 Accepted 4 September 2017 Available online 8 September 2017 Editor: L. Rolandi We present the first ever measurements of femtoscopic correlations between the KS 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 KSK − are found to be equal within the experimental uncertainties to those for KS K+. 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. © 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.

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