A1 Journal article (refereed)
Search for a common baryon source in high-multiplicity pp collisions at the LHC (2020)

ALICE Collaboration. (2020). Search for a common baryon source in high-multiplicity pp collisions at the LHC. Physics Letters B, 811, Article 135849. https://doi.org/10.1016/j.physletb.2020.135849

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2020

Volume: 811

Article number: 135849

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2020.135849

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/72596

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2004.08018

Abstract

We report on the measurement of the size of the particle-emitting source from two-baryon correlations with ALICE in high-multiplicity pp collisions at s=13 TeV. The source radius is studied with low relative momentum p–p, p‾–p‾, p–Λ, and p‾–Λ‾ pairs as a function of the pair transverse mass mT considering for the first time in a quantitative way the effect of strong resonance decays. After correcting for this effect, the radii extracted for pairs of different particle species agree. This indicates that protons, antiprotons, Λ s, and Λ‾ s originate from the same source. Within the measured mT range (1.1–2.2) GeV/c2the invariant radius of this common source varies between 1.3 and 0.85 fm. These results provide a precise reference for studies of the strong hadron–hadron interactions and for the investigation of collective properties in small colliding systems.

Keywords: particle physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2