We 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. ©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.

Measuring KS0K±interactions using Pb–Pb collisions at sNN=2.76 TeV

Cortese, P.;Ramello, L.;Sitta, M.;
2017-01-01

Abstract

We 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. ©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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11579/93895
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