Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC

S. Acharya; D. Adamova; J Adolfsson; MM. Aggarwal; G.A. Rinella; Maria Agnello; Z. Ahammed; N Ahmad; S. U. Ahn; S. Aiola; A. Akindinov; SN Alam; J.L.B. Alba; DSD Albuquerque; D. Aleksandrov; B. Alessandro; Rafael A. Molina; Ian Bearden; Christian Holm Christensen; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Ante Bilandzic; Marek Chojnacki; Valentina Zaccolo; You Zhou; Christian Alexander Bourjau; Lais Ozelin de Lima Pimentel; Katarina Gajdosova; Vojtech Pacik

doi:10.1140/epjc/s10052-017-5222-x

Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC

S. Acharya, D. Adamova, J Adolfsson, MM. Aggarwal, G.A. Rinella, Maria Agnello, Z. Ahammed, N Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, SN Alam, J.L.B. Alba, DSD Albuquerque, D. Aleksandrov, B. Alessandro, Rafael A. Molina, Ian Bearden, Christian Holm Christensen, Kristjan Herlache GulbrandsenJens Jørgen Gaardhøje, Børge Svane Nielsen, Ante Bilandzic, Marek Chojnacki, Valentina Zaccolo, You Zhou, Christian Alexander Bourjau, Lais Ozelin de Lima Pimentel, Katarina Gajdosova, Vojtech Pacik

Experimental Particle Physics

18 Citations (Scopus)

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Abstract

The transverse momentum (p_T) spectra and elliptic flow coefficient (v₂) of deuterons and anti-deuterons at mid-rapidity (| y| < 0.5) are measured with the ALICE detector at the LHC in Pb–Pb collisions at sNN = 2.76 TeV. The measurement of the p_Tspectra of (anti-)deuterons is done up to 8 GeV/ c in 0–10% centrality class and up to 6 GeV/ c in 10–20% and 20–40% centrality classes. The v₂is measured in the 0.8 < p_T<5 GeV/ c interval and in six different centrality intervals (0–5, 5–10, 10–20, 20–30, 30–40 and 40–50%) using the scalar product technique. Measured π^±, K^± and p+p ¯ transverse-momentum spectra and v₂are used to predict the deuteron p_Tspectra and v₂within the Blast-Wave model. The predictions are able to reproduce the v₂ coefficient in the measured p_Trange and the transverse-momentum spectra for p_T> 1.8 GeV/ c within the experimental uncertainties. The measurement of the coalescence parameter B₂is performed, showing a p_T dependence in contrast with the simplest coalescence model, which fails to reproduce also the measured v₂ coefficient. In addition, the coalescence parameter B₂ and the elliptic flow coefficient in the 20–40% centrality interval are compared with the AMPT model which is able, in its version without string melting, to reproduce the measured v₂(p_T) and the B₂(p_T) trend.

Original language	English
Article number	658
Journal	European Physical Journal C
Volume	77
Issue number	10
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-017-5222-x
Publication status	Published - 1 Oct 2017

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Acharya, S., Adamova, D., Adolfsson, J., Aggarwal, MM., Rinella, G. A., Agnello, M., Ahammed, Z., Ahmad, N., U. Ahn, S., Aiola, S., Akindinov, A., Alam, SN., Alba, J. L. B., Albuquerque, DSD., Aleksandrov, D., Alessandro, B., Molina, R. A., Bearden, I., Christensen, C. H., ... Pacik, V. (2017). Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC. European Physical Journal C, 77(10), [658]. https://doi.org/10.1140/epjc/s10052-017-5222-x

Acharya, S, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, GA, Agnello, M, Ahammed, Z, Ahmad, N, U. Ahn, S, Aiola, S, Akindinov, A, Alam, SN, Alba, JLB, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Molina, RA, Bearden, I , Christensen, CH , Gulbrandsen, KH , Gaardhøje, JJ , Nielsen, BS, Bilandzic, A, Chojnacki, M, Zaccolo, V, Zhou, Y, Bourjau, CA, Pimentel, LODL, Gajdosova, K & Pacik, V 2017, 'Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC', European Physical Journal C, vol. 77, no. 10, 658. https://doi.org/10.1140/epjc/s10052-017-5222-x

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title = "Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC",

abstract = "The transverse momentum (pT) spectra and elliptic flow coefficient (v2) of deuterons and anti-deuterons at mid-rapidity (| y| < 0.5) are measured with the ALICE detector at the LHC in Pb–Pb collisions at sNN = 2.76 TeV. The measurement of the pTspectra of (anti-)deuterons is done up to 8 GeV/ c in 0–10% centrality class and up to 6 GeV/ c in 10–20% and 20–40% centrality classes. The v2is measured in the 0.8 < pT<5 GeV/ c interval and in six different centrality intervals (0–5, 5–10, 10–20, 20–30, 30–40 and 40–50%) using the scalar product technique. Measured π±, K± and p+p ¯ transverse-momentum spectra and v2are used to predict the deuteron pTspectra and v2within the Blast-Wave model. The predictions are able to reproduce the v2 coefficient in the measured pTrange and the transverse-momentum spectra for pT> 1.8 GeV/ c within the experimental uncertainties. The measurement of the coalescence parameter B2is performed, showing a pT dependence in contrast with the simplest coalescence model, which fails to reproduce also the measured v2 coefficient. In addition, the coalescence parameter B2 and the elliptic flow coefficient in the 20–40% centrality interval are compared with the AMPT model which is able, in its version without string melting, to reproduce the measured v2(pT) and the B2(pT) trend.",

author = "S. Acharya and D. Adamova and J Adolfsson and MM. Aggarwal and G.A. Rinella and Maria Agnello and Z. Ahammed and N Ahmad and {U. Ahn}, S. and S. Aiola and A. Akindinov and SN Alam and J.L.B. Alba and DSD Albuquerque and D. Aleksandrov and B. Alessandro and Molina, {Rafael A.} and Ian Bearden and Christensen, {Christian Holm} and Gulbrandsen, {Kristjan Herlache} and Gaardh{\o}je, {Jens J{\o}rgen} and Nielsen, {B{\o}rge Svane} and Ante Bilandzic and Marek Chojnacki and Valentina Zaccolo and You Zhou and Bourjau, {Christian Alexander} and Pimentel, {Lais Ozelin de Lima} and Katarina Gajdosova and Vojtech Pacik",

year = "2017",

month = oct,

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doi = "10.1140/epjc/s10052-017-5222-x",

language = "English",

volume = "77",

journal = "The European Physical Journal C: Particles and Fields",

issn = "1434-6044",

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TY - JOUR

T1 - Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC

AU - Acharya, S.

AU - Adamova, D.

AU - Adolfsson, J

AU - Aggarwal, MM.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Ahammed, Z.

AU - Ahmad, N

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, SN

AU - Alba, J.L.B.

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Molina, Rafael A.

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Bilandzic, Ante

AU - Chojnacki, Marek

AU - Zaccolo, Valentina

AU - Zhou, You

AU - Bourjau, Christian Alexander

AU - Pimentel, Lais Ozelin de Lima

AU - Gajdosova, Katarina

AU - Pacik, Vojtech

PY - 2017/10/1

Y1 - 2017/10/1

N2 - The transverse momentum (pT) spectra and elliptic flow coefficient (v2) of deuterons and anti-deuterons at mid-rapidity (| y| < 0.5) are measured with the ALICE detector at the LHC in Pb–Pb collisions at sNN = 2.76 TeV. The measurement of the pTspectra of (anti-)deuterons is done up to 8 GeV/ c in 0–10% centrality class and up to 6 GeV/ c in 10–20% and 20–40% centrality classes. The v2is measured in the 0.8 < pT<5 GeV/ c interval and in six different centrality intervals (0–5, 5–10, 10–20, 20–30, 30–40 and 40–50%) using the scalar product technique. Measured π±, K± and p+p ¯ transverse-momentum spectra and v2are used to predict the deuteron pTspectra and v2within the Blast-Wave model. The predictions are able to reproduce the v2 coefficient in the measured pTrange and the transverse-momentum spectra for pT> 1.8 GeV/ c within the experimental uncertainties. The measurement of the coalescence parameter B2is performed, showing a pT dependence in contrast with the simplest coalescence model, which fails to reproduce also the measured v2 coefficient. In addition, the coalescence parameter B2 and the elliptic flow coefficient in the 20–40% centrality interval are compared with the AMPT model which is able, in its version without string melting, to reproduce the measured v2(pT) and the B2(pT) trend.

AB - The transverse momentum (pT) spectra and elliptic flow coefficient (v2) of deuterons and anti-deuterons at mid-rapidity (| y| < 0.5) are measured with the ALICE detector at the LHC in Pb–Pb collisions at sNN = 2.76 TeV. The measurement of the pTspectra of (anti-)deuterons is done up to 8 GeV/ c in 0–10% centrality class and up to 6 GeV/ c in 10–20% and 20–40% centrality classes. The v2is measured in the 0.8 < pT<5 GeV/ c interval and in six different centrality intervals (0–5, 5–10, 10–20, 20–30, 30–40 and 40–50%) using the scalar product technique. Measured π±, K± and p+p ¯ transverse-momentum spectra and v2are used to predict the deuteron pTspectra and v2within the Blast-Wave model. The predictions are able to reproduce the v2 coefficient in the measured pTrange and the transverse-momentum spectra for pT> 1.8 GeV/ c within the experimental uncertainties. The measurement of the coalescence parameter B2is performed, showing a pT dependence in contrast with the simplest coalescence model, which fails to reproduce also the measured v2 coefficient. In addition, the coalescence parameter B2 and the elliptic flow coefficient in the 20–40% centrality interval are compared with the AMPT model which is able, in its version without string melting, to reproduce the measured v2(pT) and the B2(pT) trend.

U2 - 10.1140/epjc/s10052-017-5222-x

DO - 10.1140/epjc/s10052-017-5222-x

M3 - Journal article

SN - 1434-6044

VL - 77

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 10

M1 - 658

ER -

Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC

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