Search for weakly decaying n and exotic bound states in central Pb–Pb collisions at √sNN = 2.76 TeV

Adam, J. and Erhardt, Filip and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Utrobičić, Antonija and Zyzak, M. (ALICE Collaboration) (2016) Search for weakly decaying n and exotic bound states in central Pb–Pb collisions at √sNN = 2.76 TeV. Physics Letters B, 752. pp. 267-277. ISSN 0370-2693

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Abstract

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.

Item Type: Article
Date: 10 February 2016
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: © 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 (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. Received 16 July 2015; Received in revised form 6 November 2015; Accepted 16 November 2015; Available online 28 November 2015.
Divisions: Faculty of Science > Department of Physics
Publisher: Elsevier
Depositing User: Nikola Poljak
Date Deposited: 05 Feb 2016 11:08
Last Modified: 05 Feb 2016 11:09
URI: http://digre.pmf.unizg.hr/id/eprint/4505

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