Production of 4 He and He‾4 in Pb–Pb collisions at s NN =2.76TeV at the LHC

ALICE Collaboration

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Abstract

Results on the production of 4 He and He‾4 nuclei in Pb–Pb collisions at s NN =2.76TeV in 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/dy He4 =(0.8±0.4(stat)±0.3(syst))×10 −6 and dN/dy He‾4 =(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 (T chem =156MeV) as for light hadrons. The measured ratio of He‾4/ 4 He is 1.4±0.8(stat)±0.5(syst).

Original languageEnglish (US)
Pages (from-to)1-20
Number of pages20
JournalNuclear Physics A
Volume971
DOIs
StatePublished - Mar 1 2018

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hadrons
nuclei
collisions
detectors
temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Production of 4 He and He‾4 in Pb–Pb collisions at s NN =2.76TeV at the LHC . / ALICE Collaboration.

In: Nuclear Physics A, Vol. 971, 01.03.2018, p. 1-20.

Research output: Contribution to journalArticle

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title = "Production of 4 He and He‾4 in Pb–Pb collisions at s NN =2.76TeV at the LHC",
abstract = "Results on the production of 4 He and He‾4 nuclei in Pb–Pb collisions at s NN =2.76TeV in 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/dy He4 =(0.8±0.4(stat)±0.3(syst))×10 −6 and dN/dy He‾4 =(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 (T chem =156MeV) as for light hadrons. The measured ratio of He‾4/ 4 He is 1.4±0.8(stat)±0.5(syst).",
author = "{ALICE Collaboration} and S. Acharya and D. Adamov{\'a} and J. Adolfsson and Aggarwal, {M. M.} and {Aglieri Rinella}, G. and M. Agnello and N. Agrawal and Z. Ahammed and Ahn, {S. U.} and S. Aiola and A. Akindinov and M. Al-Turany and Alam, {S. N.} and Albuquerque, {D. S.D.} and D. Aleksandrov and B. Alessandro and {Alfaro Molina}, R. and Y. Ali and A. Alici and A. Alkin and J. Alme and T. Alt and L. Altenkamper and I. Altsybeev and {Alves Garcia Prado}, C. and C. Andrei and D. Andreou and Andrews, {H. A.} and A. Andronic and V. Anguelov and C. Anson and T. Antičić and F. Antinori and P. Antonioli and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arnold, {O. W.} and Arsene, {I. C.} and M. Arslandok and B. Audurier and A. Augustinus and R. Averbeck and Azmi, {M. D.} and A. Badal{\`a} and Baek, {Y. W.} and S. Bagnasco and R. Bailhache and Seger, {Janet E.}",
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AU - ALICE Collaboration

AU - Acharya, S.

AU - Adamová, D.

AU - Adolfsson, J.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S. U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, S. N.

AU - Albuquerque, D. S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfaro Molina, R.

AU - Ali, Y.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altenkamper, L.

AU - Altsybeev, I.

AU - Alves Garcia Prado, C.

AU - Andrei, C.

AU - Andreou, D.

AU - Andrews, H. A.

AU - Andronic, A.

AU - Anguelov, V.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arnold, O. W.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Audurier, B.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Badalà, A.

AU - Baek, Y. W.

AU - Bagnasco, S.

AU - Bailhache, R.

AU - Seger, Janet E.

PY - 2018/3/1

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N2 - Results on the production of 4 He and He‾4 nuclei in Pb–Pb collisions at s NN =2.76TeV in 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/dy He4 =(0.8±0.4(stat)±0.3(syst))×10 −6 and dN/dy He‾4 =(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 (T chem =156MeV) as for light hadrons. The measured ratio of He‾4/ 4 He is 1.4±0.8(stat)±0.5(syst).

AB - Results on the production of 4 He and He‾4 nuclei in Pb–Pb collisions at s NN =2.76TeV in 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/dy He4 =(0.8±0.4(stat)±0.3(syst))×10 −6 and dN/dy He‾4 =(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 (T chem =156MeV) as for light hadrons. The measured ratio of He‾4/ 4 He is 1.4±0.8(stat)±0.5(syst).

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