A bstract A study on the Bose-Einstein correlations for triplets of same-sign pions is presented. The analysis is performed using proton-proton collisions at a centre-of-mass energy of s s = 7 TeV, recorded by the LHCb experiment, corresponding to an integrated luminosity of 1. 0 fb − 1. For the first time, the results are interpreted in the core-halo model. The parameters of the model are determined in regions of charged-particle multiplicity. This measurement provides insight into the nature of hadronisation in terms of coherence, being consistent with the presence of coherent emission of pions.
Aaij et al. (Thu,) studied this question.
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