Naslov
Search for weakly decaying Λn and ΛΛ exotic bound states in central Pb-Pb collisions at √sNN = 2.76 TeV

Autori
Adam, J. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zyzak, M.

Kolaboracija
ALICE Collaboration

Izvornik
Physics letters. B (0370-2693) 752 (2016); 267-277

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

Ključne riječi
weakly decaying ; Λn ; lambda ; ΛΛ ; exotic ; bound states ; Pb-Pb ; 2.76 TeV

Sažetak
We present results of a search for two hypothetical strange dibaryon states, i.e. the H-dibaryon and the possible View the MathML source bound state. The search is performed with the ALICE detector in central (0–10%) Pb– Pb collisions at View the MathML source, by invariant mass analysis in the decay modes View the MathML source and H-dibaryon →Λpπ−. No evidence for these bound states is observed. Upper limits are determined at 99% confidence level for a wide range of lifetimes and for the full range of branching ratios. The results are compared to thermal, coalescence and hybrid UrQMD model expectations, which describe correctly the production of other loosely bound states, like the deuteron and the hypertriton.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA