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Adam, J; Adamová, D; Aggarwal, M. M; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z
The European physical journal. C, Particles and fields, 08/2017, Letnik: 77, Številka: 8Journal Article
Two-particle angular correlations were measured in pp collisions at Formula omitted TeV for pions, kaons, protons, and lambdas, for all particle/anti-particle combinations in the pair. Data for mesons exhibit an expected peak dominated by effects associated with mini-jets and are well reproduced by general purpose Monte Carlo generators. However, for baryon-baryon and anti-baryon-anti-baryon pairs, where both particles have the same baryon number, a near-side anti-correlation structure is observed instead of a peak. This effect is interpreted in the context of baryon production mechanisms in the fragmentation process. It currently presents a challenge to Monte Carlo models and its origin remains an open question.
