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

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http://hdl.handle.net/10138/224314

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Adam , J , Brucken , E J , Chang , B , Kim , D J , Litichevskyi , V , Mieskolainen , M M , Orava , R , Rak , J , Räsänen , S S , Snellman , T W , Trzaska , W H , Viinikainen , J & The ALICE Collaboration 2017 , ' Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at root s=7 TeV ' , European Physical Journal C. Particles and Fields , vol. 77 , no. 8 , 569 . https://doi.org/10.1140/epjc/s10052-017-5129-6

Title: Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at root s=7 TeV
Author: Adam, J.; Brucken, E. J.; Chang, B.; Kim, D. J.; Litichevskyi, V.; Mieskolainen, M. M.; Orava, R.; Rak, J.; Räsänen, S. S.; Snellman, T. W.; Trzaska, W. H.; Viinikainen, J.; The ALICE collaboration
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
Date: 2017-08-24
Language: eng
Number of pages: 17
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
URI: http://hdl.handle.net/10138/224314
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 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.
Subject: PB COLLISIONS
ROOT-S(NN)=5.02 TEV
LONG-RANGE
MULTIPLICITY DEPENDENCE
PROTON
SIDE
KAON
PION
LHC
114 Physical sciences
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