Projects per year
The production of the hypertriton nuclei 3ΛH and 3Λ̅H̅ 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 3ΛH yield in one unity of rapidity, dN/dy × B . R . ( 3ΛH → 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 = 3ΛH/( 3He × Λ/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 measured3ΛH lifetime, τ = 181−39+54 (stat.)±33(syst.) ps is in agreement within 1σ with the world average value.
|Number of pages||13|
|Journal||Physics Letters B|
|Early online date||25 Jan 2016|
|Publication status||Published - 10 Mar 2016|
Bibliographical noteLee Barnby - Physics Working Group convenor of group overseeing and approving analysis in paper
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- 1 Finished
Birmingham Nuclear Physics Group Consolidated Grant
Jones, P., Evans, P., Freer, M. & Wheldon, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/14 → 30/09/18
Project: Research Councils