3ΛH and -3Λ-H production in Pb-Pb collisions at √sNN=2.76 TeV
Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahn, Sang Un; Aimo, Ilaria; Aiola, Salvatore; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Haaland, Øystein Senneset; Huang, Meidana; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen; Ajaz, Muhammad; Akindinov, Alexander; Alam, Sk Noor; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; Alfaro Molina, José Rubén; ALICE, Collaboration
Journal article, Peer reviewed
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http://hdl.handle.net/11250/2560095Utgivelsesdato
2016Metadata
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Sammendrag
The production of the hypertriton nuclei 3_Hand 3¯_Hhas been measured for the first time in Pb–Pbcollisions at √sNN=2.76TeVwith the ALICE experiment at LHC. The pT-integrated 3_Hyield in one unity of rapidity, dN/dy ×B.R. _3_H→3He,π− _=(3.86±0.77(stat.)±0.68(syst.))×10−5in the 0–10%most central collisions, is consistent with the predictions from a statistical thermal model using the same temperature as for the light hadrons. The coalescence parameter B3shows a dependence on the transverse momentum, similar to the B2of deuterons and the B3of 3He nuclei. The ratio of yields S3=3_H/(3He×_/p)was measured to be S3=0.60 ±0.13(stat.) ±0.21(syst.)in 0–10%centrality events; this value is compared to different theoretical models. The measured S3is compatible with hermal model predictions. The measured 3_Hlifetime, τ=181+54−39(stat.) ±33(syst.) psis in agreement within 1σwith the world average value.