Number of the records: 1
Investigating the role of strangeness in baryon-antibaryon annihilation at the LHC
- 1.0559106 - ÚJF 2023 RIV NL eng J - Journal Article
Acharya, S. - Adamová, Dagmar - Adler, A. - Adolfsson, J. - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Herman, T. - Horák, D. - Isakov, Artem - Kotliarov, 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 1022 authors
Investigating the role of strangeness in baryon-antibaryon annihilation at the LHC.
Physics Letters. B. Roč. 829, JUN (2022), č. článku 137060. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT(CZ) LTT17018
Research Infrastructure: CERN-CZ II - 90104
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * heavy ion experiments
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 4.3, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.physletb.2022.137060
Annihilation dynamics plays a fundamental role in the baryon-antibaryon interaction (B-(B) over bar) at low-energy and its strength and range are crucial in the assessment of possible baryonic bound states. Experimental data on annihilation cross sections are available for the p-(p) over bar system but not in the low relative momentum region. Data regarding the B-(B) over bar interaction with strange degrees of freedom are extremely scarce, hence the modeling of the annihilation contributions is mainly based on nucleon-antinucleon (N-(N) over bar) results, when available. In this letter we present a measurement of the p-(p) over bar, p-(Lambda) over bar circle plus(p) over bar-Lambda and Lambda-(Lambda) over bar interaction using correlation functions in the relative momentum space in high-multiplicity triggered pp collisions at root s = 13 TeV recorded by ALICE at the LHC. In the p-(p) over bar system the couplings to the mesonic channels in different partial waves are extracted by adopting a coupled-channel approach with recent chi EFT potentials. The inclusion of these inelastic channels provides good agreement with the data, showing a significant presence of the annihilation term down to zero momentum. Predictions obtained using the Lednicky-Lyuboshits formula and scattering parameters obtained from heavy-ion collisions, hence mainly sensitive to elastic processes, are compared with the experimental p-(Lambda) over bar circle plus(p) over bar-Lambda and Lambda-(Lambda) over bar correlations. The model describes the Lambda-(Lambda) over bar data and underestimates the p-(Lambda) over bar circle plus(p) over bar-Lambda data in the region of momenta below 200 MeV/c. The observed deviation indicates a different contribution of annihilation channels to the two systems containing strange hadrons.
Permanent Link: https://hdl.handle.net/11104/0332526
File Download Size Commentary Version Access 0559106.pdf 0 2.2 MB Open Access - CC licence Publisher’s postprint open-access
Number of the records: 1