Measuring KS0K± interactions using pp collisions at √s = 7 TeV
ALICE Collaboration. (2019). Measuring KS0K± interactions using pp collisions at √s = 7 TeV. Physics Letters B, 790, 22-34. https://doi.org/10.1016/j.physletb.2018.12.033
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Physics Letters BAuthors
Date
2019Copyright
© 2018 Published by Elsevier B.V.
We present the first measurements of femtoscopic correlations between the K0
S and K± particles in pp
collisions at √s = 7 TeV measured by the ALICE experiment. The observed femtoscopic correlations
are consistent with final-state interactions proceeding solely via the a0(980) resonance. The extracted
kaon source radius and correlation strength parameters for K0
SK− are found to be equal within the
experimental uncertainties to those for K0
SK+. Results of the present study are compared with those
from identical-kaon femtoscopic studies also performed with pp collisions at √s = 7 TeV by ALICE and
with a K0
SK± measurement in Pb–Pb collisions at √sNN = 2.76 TeV. Combined with the Pb–Pb results, our
pp analysis is found to be compatible with the interpretation of the a0(980) having a tetraquark structure
instead of that of a diquark.
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