Abstract
We present the result of the femtoscopic analysis of non-identical charged kaon correlations in Pb-Pb collisions at obtained in ALICE at the LHC. One-dimensional K+K− correlation functions were analyzed in three centrality classes and eight transverse momentum ranges. The femtoscopic correlations of K+K− pairs are the result of Coulomb final-state interactions and formation of a 0(980) and f 0(980) resonances. The K+K− correlation function was fit with the R. Lednicky and V. Luboshitz model [1]. For the first time, f 0(980) mass and couplings were extracted from the K+K− correlation functions fit with the constraint on the radii to be close to the corresponding radii from identical charged kaon correlations.
Highlights
Traditional femtoscopy is a tool for measuring the spatio-temporal characteristics of the particle emission region in the collision of ions and/or particles
We present the result √of the femtoscopic analysis of non-identical charged kaon correlations in Pb-Pb collisions at sNN = 2.76 TeV obtained in ALICE at the LHC
F0(980) mass and couplings were extracted from the K+K− correlation functions fit with the constraint on the radii to be close to the corresponding radii from identical charged kaon correlations
Summary
Traditional femtoscopy is a tool for measuring the spatio-temporal characteristics of the particle emission region in the collision of ions and/or particles. Femtoscopy requires the determination of a correlation function which is affected by the final state interaction between the emitted particles. There has been great interest in measuring the parameters of the final state interactions using femtoscopy methods. This requires determining the femtoscopy correlations of non-identical kaons K0SK± [2, 3]. The point here is that the interaction in the final state K+K− is rather complex. It includes the Coulomb interaction and strong interaction through the resonances paper, results from the f0(980)
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