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 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 / 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., Akbar, Z., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 811:(2020), pp. 1-13. [10.1016/j.physletb.2020.135849]

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

Cunqueiro, L.;Toppi, M.;
2020

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 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
quark; gluon; plasma
01 Pubblicazione su rivista::01a Articolo in rivista
Search for a common baryon source in high-multiplicity pp collisions at the LHC / 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., Akbar, Z., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 811:(2020), pp. 1-13. [10.1016/j.physletb.2020.135849]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1469781
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