Deciphering nonfemtoscopic two-pion correlations in $p+p$ collisions with simple analytical models

Details Deciphering nonfemtoscopic two-pion correlations in $p+p$ collisions with simple analytical models Deciphering nonfemtoscopic two-pion correlations in $p+p$ collisions with simple analytical models

2011-06-25

arxiv.org/abs/1106.5120v3

Phys.Rev.D85:074023,2012

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 10 figures, misprints corrected

Scientific paper

A simple model of nonfemtoscopic particle correlations in proton-proton collisions is proposed. The model takes into account correlations induced by the conservation laws as well as correlations induced by minijets. It reproduces well the two-pion nonfemtoscopic correlations of like-sign and unlike-sign pions in proton-proton collision events at $\sqrt{s} = 900$ GeV analyzed by the ALICE Collaboration. We also argue that similar nonfemtoscopic correlations can appear in the hydrodynamic picture with event-by-event fluctuating nonsymmetric initial conditions that are typically associated with nonzero higher-order flow harmonics.

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