Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at root s=7 TeV
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and Zinovjev, G. and Zmeskal, J. and ALICE Collaboration... Show more Show less
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Abstract
Two-particle angular correlations were measured in pp collisions at root
s = 7 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 innstead 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.... Show more Show less