3ΛH and 3Λ¯H‾ production in Pb–Pb collisions at √sNN = 2.76 TeV
ALICE Collaboration. (2016). 3ΛH and 3Λ¯H‾ production in Pb–Pb collisions at √sNN = 2.76 TeV. Physics Letters B, 754, 360-372. https://doi.org/10.1016/j.physletb.2016.01.040
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Physics Letters BTekijät
Päivämäärä
2016Tekijänoikeudet
© 2016 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.
The production of the hypertriton nuclei 3
H and 3
¯ H has been measured for the first time in Pb–Pb
collisions at √sNN = 2.76 TeV with the ALICE experiment at LHC. The pT-integrated 3
H yield in one
unity of rapidity, dN/dy × B.R.
3
H→3He,π− = (3.86 ± 0.77(stat.) ± 0.68(syst.)) × 10−5 in 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 B3 shows a dependence on the
transverse momentum, similar to the B2 of deuterons and the B3 of 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 S3 is compatible with thermal
model predictions. The measured 3
H lifetime, τ = 181+54
−39(stat.) ± 33(syst.) ps is in agreement within 1σ
with the world average value.
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https://converis.jyu.fi/converis/portal/detail/Publication/25556748
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