Measurement of strange baryon–antibaryon interactions with femtoscopic correlations (CROSBI ID 276373)
Prilog u časopisu | Pismo (znanstveno) | međunarodna recenzija
Podaci o odgovornosti
Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zurlo, N.
ALICE Collaboration
engleski
Measurement of strange baryon–antibaryon interactions with femtoscopic correlations
Two-particle correlation functions were measured for pp‾ , pΛ‾ , p‾Λ , and ΛΛ‾ pairs in Pb–Pb collisions at √sNN=2.76 TeV and √sNN=5.02 TeV recorded by the ALICE detector. From a simultaneous fit to all obtained correlation functions, real and imaginary components of the scattering lengths, as well as the effective ranges, were extracted for combined pΛ‾ and p‾Λ pairs and, for the first time, for ΛΛ‾ pairs. Effective averaged scattering parameters for heavier baryon–antibaryon pairs, not measured directly, are also provided. The results reveal similarly strong interaction between measured baryon–antibaryon pairs, suggesting that they all annihilate in the same manner at the same pair relative momentum k* . Moreover, the reported significant non-zero imaginary part and negative real part of the scattering length provide motivation for future baryon–antibaryon bound state searches.
strange baryon–antibaryon ; femtoscopic correlations
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Podaci o izdanju
802
2020.
135223
14
objavljeno
0370-2693
1873-2445
10.1016/j.physletb.2020.135223