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Search for a common baryon source in high-multiplicity pp collisions at the LHC (CROSBI ID 287093)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

(ALICE Collaboration) Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... et al. Search for a common baryon source in high-multiplicity pp collisions at the LHC // Physics letters. B, 811 (2020), 135849, 13. doi: 10.1016/j.physletb.2020.135849

Podaci o odgovornosti

Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Vicković, Linda ; ... ; Zurlo, N.

ALICE Collaboration

engleski

Search for a common baryon source in high-multiplicity pp collisions at the LHC

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 √sNN = 13 TeV. The source radius is studied with low relative momentum p–p, antiproton-antiproton, p–Λ , and antiproton- anti-Λ pairs as a function of the pair transverse mass 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, Λs, and anti-Λs originate from the same source. Within the measured range (1.1–2.2) GeV the 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.

baryon correlations ; invariant radius ; strong hadron–hadron interactions ; strong resonance decay

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Podaci o izdanju

811

2020.

135849

13

objavljeno

0370-2693

1873-2445

10.1016/j.physletb.2020.135849

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Fizika

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