Journal Article Production of 4He and 4Hein Pb–Pb collisions at √sNN=2.76TeVat the LHC

.ALICE Collaboration  ,  Busch, O.  ,  Chujo, T.  ,  Miake, Y.  ,  Sakai, S.

971pp.1 - 20 , 2017-12 , Elsevier
Results on the production of 4He and 4Henuclei in Pb–Pb collisions at √sNN=2.76TeVin the rapidity range |y|<1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0–10% central events are found to be dN/dy4He=(0.8±0.4(stat)±0.3(syst))×10−6and dN/dy4He=(1.1 ±0.4(stat) ±0.2(syst)) ×10−6, respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (Tchem=156MeV) as for light hadrons. The measured ratio of 4He/4Heis 1.4 ±0.8(stat) ±0.5(syst).

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