The transverse momentum (p(T)) spectra and elliptic flow coefficient (v(2)) 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 root s(NN) = 2.76 TeV. The measurement of the p(T) spectra 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 v(2) is 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 pi(+/-), K-+/- and p+(p) over bar transverse-momentum spectra and v(2) are used to predict the deuteron p(T) spectra and v(2) within the Blast-Wave model. The predictions are able to reproduce the v(2) coefficient in the measured p(T) range and the transverse-momentum spectra for p(T) > 1.8 GeV/c within the experimental uncertainties. The measurement of the coalescence parameter B-2 is performed, showing a p(T) dependence in contrast with the simplest coalescence model, which fails to reproduce also the measured v(2) coefficient. In addition, the coalescence parameter B-2 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 v(2)(p(T)) and the B-2(p(T)) trend.

Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC / Acharya, S., Adamova, D., Adolfsson, J., Aggarwal, M.M., Rinella, G.A., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, N., Ahn, S.U., Aiola, S., Akindinov, A., Alam, S.N., Alba, J.L.B., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Alici, A., Alkin, A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 77:10(2017). [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

Cunqueiro, L.;Meddi, F.;
2017

Abstract

The transverse momentum (p(T)) spectra and elliptic flow coefficient (v(2)) 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 root s(NN) = 2.76 TeV. The measurement of the p(T) spectra 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 v(2) is 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 pi(+/-), K-+/- and p+(p) over bar transverse-momentum spectra and v(2) are used to predict the deuteron p(T) spectra and v(2) within the Blast-Wave model. The predictions are able to reproduce the v(2) coefficient in the measured p(T) range and the transverse-momentum spectra for p(T) > 1.8 GeV/c within the experimental uncertainties. The measurement of the coalescence parameter B-2 is performed, showing a p(T) dependence in contrast with the simplest coalescence model, which fails to reproduce also the measured v(2) coefficient. In addition, the coalescence parameter B-2 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 v(2)(p(T)) and the B-2(p(T)) trend.
2017
HEAVY-ION COLLISIONS; RELATIVISTIC NUCLEAR COLLISIONS; PLUS AU; COLLISIONS; DEPENDENCE; ANISOTROPY; EXPANSION; MODEL
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of deuteron spectra and elliptic flow in Pb-Pb collisions at root s(NN)=2.76 TeV at the LHC / Acharya, S., Adamova, D., Adolfsson, J., Aggarwal, M.M., Rinella, G.A., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, N., Ahn, S.U., Aiola, S., Akindinov, A., Alam, S.N., Alba, J.L.B., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Alici, A., Alkin, A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 77:10(2017). [10.1140/epjc/s10052-017-5222-x]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1077175
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