Exploring the NΛ–NΣ coupled system with high precision correlation techniques at the LHC

Acharya, S.; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Karatović, David; ...; Lončar, Petra; ...; Mudnić, Eugen; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Vicković, Linda; ...; Zurlo, N.

doi:10.1016/j.physletb.2022.137272

Pregled bibliografske jedinice broj: 1222436

Exploring the NΛ–NΣ coupled system with high precision correlation techniques at the LHC

(ALICE Collaboration) Acharya, S.; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Karatović, David; ... et al.

Exploring the NΛ–NΣ coupled system with high precision correlation techniques at the LHC // Physics Letters B, 833 (2022), 137272, 12 doi:10.1016/j.physletb.2022.137272 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 1222436 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Exploring the NΛ–NΣ coupled system with high precision correlation techniques at the LHC

Autori
Acharya, S. ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Karatović, David ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Physics Letters B (0370-2693) 833 (2022); 137272, 12

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nucleon Lambda: interaction ; up: momentum ; effective field theory: chiral ; nucleus: equation of state ; potential: transition ; p p: scattering ; correlation function ; coupled channel ; CERN LHC Coll ; hyperon ; coupling constant ; mass difference ; neutron star ; correlation ; 13000 GeV-cms/nucleon

Sažetak
The interaction of and hyperons (Y) with nucleons (N) is strongly influenced by the coupled-channel dynamics. Due to the small mass difference of the N and Nsystems, the sizable coupling strength of the N↔N processes constitutes a crucial element in the determination of the N interaction. In this letter we present the most precise measurements on the interaction of p pairs, from zero relative momentum up to the opening of the N channel. The correlation function in the relative momentum space for p⊕p pairs measured in high-multiplicity triggered pp collisions at √s = 13 TeV at the LHC is reported. The opening of the inelastic N channels is visible in the extracted correlation function as a cusp-like structure occurring at relative momentum k∗ = 289 MeV/c. This represents the first direct experimental observation of the N ↔ N coupled channel in the p system. The correlation function is compared with recent chiral effective field theory calculations, based on different strengths of the N ↔ N transition potential. A weaker coupling, as possibly supported by the present measurement, would require a more repulsive three-body NNinteraction for a proper description of the in-medium properties, which has implications on the nuclear equation of state and for the presence of hyperons inside neutron stars.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA

Ustanove:
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Prirodoslovno-matematički fakultet, Zagreb

Profili:

David Karatović (autor)