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

0538793 - ÚJF 2021 RIV NL eng J - Journal Article
Acharya, S. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Herman, T. - Horák, D. - Isakov, Artem - Křížek, Filip - Křížková Gajdošová, K. - Kushpil, Svetlana - Lavička, R. - Mareš, Jiří A. - Petráček, V. - Šafařík, K. - Šumbera, Michal - Torres, S. R. - Trzeciak, B. A. - Závada, Petr … Total 1006 authors
Search for a common baryon source in high-multiplicity pp collisions at the LHC.
Physics Letters. B. Roč. 811, DEC (2020), č. článku 135849. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT(CZ) LTT17018; GA MŠMT(CZ) LM2018104
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE * heavy ion experiments
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 4.771, year: 2020
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2020.135849

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 root s=13 TeV. The source radius is studied with low relative momentum pp, p–p, p–Lambda, and -p-Lambda 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, Lambda s, and -Labmda s originate from the same source. Within the measured mT range (1.1–2.2) GeV/c2 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.
Permanent Link: http://hdl.handle.net/11104/0316519