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Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at √s=7 TeV
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Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at √s=7 TeV

J. Adam, D. Adamová, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S. Ahmad, S.U. Ahn, S. Aiola, …
European Physical Journal C, 卷.77(8), 569
08/2017

摘要

Engineering (miscellaneous) Physics and Astronomy (miscellaneous)
Two-particle angular correlations were measured in pp collisions at 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 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.

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https://doi.org/10.1140/epjc/s10052-017-5129-6檢視
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