Measuring KS 0K± interactions using Pb–Pb collisions at sNN=2.76 TeV

Summary, in English

We present the first ever measurements of femtoscopic correlations between the KS 0 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 KS 0K− are found to be equal within the experimental uncertainties to those for KS 0K+. 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

• Author: S Acharya; D. Adamova; Jonatan Adolfsson; M.M Aggarwal; G Aglieri Rinella; M. Agnello; Peter Christiansen; Martin Ljunggren; Anders Oskarsson; David Silvermyr; Evert Stenlund; Vytautas Vislavicius
• Department/s: Particle and nuclear physics
• Publishing year: 2017
• Language: English
• Pages: 64-77
• Publication/Series: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 774
• Links: http://dx.doi.org/10.1016/j.physletb.2017.09.009
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693