# Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at $\sqrt{s}=7$ TeV

Abstract : Two-particle angular correlations were measured in pp collisions at $\sqrt{s} = 7$ TeV. The analysis was carried out 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.
Type de document :
Pré-publication, Document de travail
SUBATECh-Plasma. 23 pages, 7 captioned figures, 2 tables, authors from page 18, submitted to EPJC, figures at http.. 2017

http://hal.in2p3.fr/in2p3-01425231
Contributeur : Sylvie Flores <>
Soumis le : mardi 3 janvier 2017 - 14:12:43
Dernière modification le : mardi 16 janvier 2018 - 16:36:59

### Identifiants

• HAL Id : in2p3-01425231, version 1
• ARXIV : 1612.08975

### Citation

J. Adam, J.C. Hamon, B. Hippolyte, C. Kuhn, A. Maire, et al.. Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at $\sqrt{s}=7$ TeV. SUBATECh-Plasma. 23 pages, 7 captioned figures, 2 tables, authors from page 18, submitted to EPJC, figures at http.. 2017. 〈in2p3-01425231〉

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