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

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, ALICE Collaboration

Research output: Contribution to journalArticlepeer-review

10 Citations (SciVal)

Abstract

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
Original languageEnglish
Pages (from-to)64-77
Number of pages14
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume774
DOIs
Publication statusPublished - 2017

Bibliographical note

Export Date: 24 November 2017

Subject classification (UKÄ)

  • Subatomic Physics

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