Signatures of collective flow in high multiplicity pp collisions

Abstract

A blast-wave parametrization, including a full set of hadronic resonances, is used to model a small system, with total particle multiplicity comparable to the one measured in the high-multiplicity pp collisions at the LHC. Calculations are preformed for three cases: with negligible, regular and strong radial flow on the blast-wave hypersurface. We investigate the effects of flow on inclusive p_T spectra as well as on 1D and 3D femtoscopic radii for pions. Special emphasis is put on the role of pions from resonance decays. In particular we show that they magnify the flow effects present in the blast-wave stage and significantly influence the shape of the correlation functions. A specific observable, the R^E_out/R^G_side ratio is proposed as a sensitive probe of the collective effects. Model results for the high multiplicity pp collisions, for scenarios with small and large radial flow are compared.

9 pages, 10 figures

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Cited by in corpus (12)

• Color reconnection and flow-like patterns in pp collisions
• Effects of Colour Reconnection on Hadron Flavour Observables
• Observation of a "Ridge" correlation structure in high multiplicity proton-proton collisions: A brief review
• Size of the emission source and collectivity in ultra-relativistic p-Pb collisions
• Charged kaon femtoscopic correlations in pp collisions at $\sqrt{s}=7$ TeV
• K${}_s^0$K${}_s^0$ correlations in pp collisions at $\sqrt{s}=7$ TeV from the LHC ALICE experiment
• Femtoscopic signature of strong radial flow in high-multiplicity $pp$ collisions
• Hyperon/meson ratios in rare high-multiplicity $pp$ collisions at energies available at the Large Hadron Collider, and potential signatures for mini-quark-gluon plasma formation
• Anomalous features of particle production in high-multiplicity events of pp collisions at the LHC energies
• Extracting the hadronization timescale in sqrt{s}=7 TeV proton-proton collisions from pion and kaon femtoscopy
• Investigating radial flow-like effects via pseudorapidity and transverse spherocity dependence of particle production in pp collisions at the LHC
• Revisiting the soft-hard separation in the transverse momentum spectra of $pp$ collisions