Exploring Collective Effects in Small Collision Systems via Light-Flavour Particle Production in High-Multiplicity pp Collisions at √s= 13 TeV in ALICE
Abstract
High-multiplicity pp and p-Pb collisions show signatures of radial and anisotropic flow, as well as the enhanced production of strange hadrons. These observations resemble phenomena seen in heavy-ion collisions, where a quark-gluon plasma (QGP) is formed, although their origin in small systems remains under discussion. This contribution presents ALICE Run 2 results on light-flavour hadron (π, K, p) production in high-multiplicity (HM) pp collisions at √s=13 TeV, where the charged-particle multiplicity reaches values comparable to peripheral or semi-peripheral Pb-Pb collisions. The multiplicity dependence of π, K, and p transverse momentum spectra, pT-differential and pT-integrated particle ratios, and mean transverse momenta (⟨ pT⟩) is presented and compared with published results from other collision systems and energies, as well as with PYTHIA 8 and EPOS4 model calculations.
Related
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- Color-Reconnection Effects on the nMPI-Nch Conditional Multiplicity Fluctuations in PYTHIA 8 pp Collisions
- Photon-induced J/ψ as a linearly polarized probe of collision geometry in relativistic heavy-ion collisions
- Study of the multiplicity dependence of non-flow correlations in pp collisions at √s=200 GeV using PYTHIA
- Probing Forward-Backward Multiplicity Correlations and Fluctuations Using the Strongly Intensive Observable Σ in Pb-Pb Collisions at SPS Energies with UrQMD
BibTeX
@misc{collaboration2026exploring,
title = {{Exploring Collective Effects in Small Collision Systems via Light-Flavour Particle Production in High-Multiplicity pp Collisions at $\sqrts=$ 13 TeV in ALICE}},
author = {Rajendra Nath Patra for the ALICE Collaboration},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.14851},
eprint = {2610.14851},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.14851},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Exploring Collective Effects in Small Collision Systems via Light-Flavour Particle Production in High-Multiplicity pp Collisions at √s= 13 TeV in ALICE
AU - Rajendra Nath Patra for the ALICE Collaboration
PY - 2026
DA - 2026/10/10
PB - arXiv
DO - 10.48550/arxiv.2610.14851
UR - https://arxiv.org/abs/2610.14851
AB - High-multiplicity pp and p-Pb collisions show signatures of radial and anisotropic flow, as well as the enhanced production of strange hadrons. These observations resemble phenomena seen in heavy-ion collisions, where a quark-gluon plasma (QGP) is formed, although their origin in small systems remains under discussion. This contribution presents ALICE Run 2 results on light-flavour hadron (π, K, p) production in high-multiplicity (HM) pp collisions at √s=13 TeV, where the charged-particle multiplicity reaches values comparable to peripheral or semi-peripheral Pb-Pb collisions. The multiplicity dependence of π, K, and p transverse momentum spectra, p_T-differential and p_T-integrated particle ratios, and mean transverse momenta (⟨ p_T⟩) is presented and compared with published results from other collision systems and energies, as well as with PYTHIA 8 and EPOS4 model calculations.
ER -