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 TeV. The source radius is studied with low relative momentum p–p, , p–Λ , and 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, Λ s, and antiΛ s originate from the same source. Within the measured range (1.1–2.2) GeVthe 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.

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

Bonomi, G.;Pagano, D.;Zurlo, N.
2020-01-01

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 TeV. The source radius is studied with low relative momentum p–p, , p–Λ , and 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, Λ s, and antiΛ s originate from the same source. Within the measured range (1.1–2.2) GeVthe 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.
2020
2020
Enti pubb. di ricerca ital.
Esperti anonimi
Inglese
Internazionale
ELETTRONICO
811
135849
Barions; strong interaction; LHC
Altre Istituz. pubb. estere
https://www.sciencedirect.com/science/article/pii/S0370269320306523?via=ihub
1008
info:eu-repo/semantics/article
262
Acharya, S.; Adamová, D.; Adler, A.; Adolfsson, J.; Aggarwal, M. M.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/537276
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