Measuring (KSK +/-)-K-0 interactions using pp collisions at root s=7 TeV
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Abstract
We present the first measurements of femtoscopic correlations between
the K-S(0) and K-+/- particles in pp collisions at root s = 7 TeV
measured by the ALICE experiment. The observed femtoscopic correlations
are consistent with final-state interactions proceeding solely via the
a(0)(980) resonance. The extracted kaon source radius and correlation
strength parameters for (KSK-)-K-0 are found to be equal within the
experimental uncertainties to those for (KSK+)-K-0. Results of the
present study arre compared with those from identical-kaon femtoscopic
studies also performed with pp collisions at root s = 7 TeV by ALICE and
with a (KSK +/-)-K-0 measurement in Pb-Pb collisions at root s(NN) =
2.76 TeV. Combined with the Pb-Pb results, our pp analysis is found to
be compatible with the interpretation of the a (980) having a tetraquark
structure instead of that of a diquark. (C) 2018 Published by Elsevier
B.V.... Show more Show less