Search for weakly decaying Λn‾ and ΛΛ exotic bound states in central Pb–Pb collisions at √sNN = 2.76 TeV
ALICE Collaboration. (2016). Search for weakly decaying Λn‾ and ΛΛ exotic bound states in central Pb–Pb collisions at √sNN = 2.76 TeV. Physics Letters B, 752, 267-277. https://doi.org/10.1016/j.physletb.2015.11.048
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Physics Letters BAuthors
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2016Copyright
© 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
We present results of a search for two hypothetical strange dibaryon states, i.e. the H-dibaryon and
the possible n bound state. The search is performed with the ALICE detector in central (0–10%) Pb–
Pb collisions at √sNN = 2.76 TeV, by invariant mass analysis in the decay modes n → dπ+ and Hdibaryon
→ pπ−. 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.
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Except where otherwise noted, this item's license is described as © 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
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