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

S. Acharya, D. Adamová, J. Adolfsson, M. M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, N. Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, S. N. Alam, J. L.B. Alba, D. S.D. Albuquerque, D. Aleksandrov, B. Alessandro, R. Alfaro Molina, A. Alici, A. AlkinJ. Alme, T. Alt, L. Altenkamper, I. Altsybeev, C. Alves Garcia Prado, M. An, C. Andrei, D. Andreou, H. A. Andrews, A. Andronic, V. Anguelov, C. Anson, T. Antičić, F. Antinori, P. Antonioli, R. Anwar, L. Aphecetche, H. Appelshäuser, S. Arcelli, R. Arnaldi, O. W. Arnold, I. C. Arsene, M. Arslandok, I. Diakonov, G. Feofilov, V. Kondratiev, V. Kovalenko, V. Vechernin, L. Vinogradov, A. Zarochentsev, ALICE Collaboration

Research output

7 Citations (Scopus)

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.

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 - 10 Nov 2017

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Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Acharya, S., Adamová, D., Adolfsson, J., Aggarwal, M. M., Aglieri Rinella, G., Agnello, M., ... ALICE Collaboration (2017). Measuring KS 0K± interactions using Pb–Pb collisions at sNN=2.76 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 774, 64-77. https://doi.org/10.1016/j.physletb.2017.09.009