Search for weakly decayingΛn‾and ΛΛ exotic bound states in central Pb–Pb collisions atsNN=2.76 TeV

J. Adam, D. Adamová, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, I. Ahmed, S.U. Ahn, I. Aimo, S. Aiola, M. Ajaz (+962 others)
2016 Physics Letters B  
We present results of a search for two hypothetical strange dibaryon states, i.e. the H-dibaryon and the possible Λ̅n̅ bound state. The search is performed with the ALICE detector in central (0-10 at √(s_NN) = 2.76 TeV, by invariant mass analysis in the decay modes Λ̅n̅→d̅π^+ and H-dibaryon →Λpπ^-. No evidence for these bound states is observed. Upper limits are determined at 99 for a wide range of lifetimes and for the full range of branching ratios. The results are compared to thermal,
more » ... ence and hybrid UrQMD model expectations, which describe correctly the production of other loosely bound states, like the deuteron and the hypertriton.
doi:10.1016/j.physletb.2015.11.048 fatcat:inbfym7rc5ejhlzgt3jaac3ccu