Measurement of deuteron spectra and elliptic flow in Pb–Pb collisions at √sNN=2.76 TeV at the LHC

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Veröffentlicht in:	The European physical journal / C 77(2017,10) Artikel-Nummer 658, 20 Seiten
Personen und Körperschaften:	Acharya, Shreyasi (VerfasserIn), Angelov, Venelin (VerfasserIn), Arslandok, Mesut (VerfasserIn), Danisch, Meike (VerfasserIn), Deisting, Alexander (VerfasserIn), Glässel, Peter (VerfasserIn), Kim, Jiyoung (VerfasserIn), Klewin, Sebastian (VerfasserIn), Leardini, Lucia (VerfasserIn), Mercado Pérez, Jorge (VerfasserIn), Oeschler, Helmut (VerfasserIn), Ohlson, Alice (VerfasserIn), Pachmayer, Yvonne C. (VerfasserIn), Reygers, Klaus (VerfasserIn), Schicker, Rainer (VerfasserIn), Schmidt, Marten Ole (VerfasserIn), Schuchmann, Simone (VerfasserIn), Stachel, Johanna (VerfasserIn), Weiser, Dennis (VerfasserIn), Wilkinson, Jeremy (VerfasserIn), Windelband, Bernd (VerfasserIn), Zimmermann, Alice (VerfasserIn), ALICE Körperschaft (VerfasserIn)
Titel:	Measurement of deuteron spectra and elliptic flow in Pb–Pb collisions at √sNN=2.76 TeV at the LHC/ ALICE Collaboration*
Format:	E-Book-Kapitel
Sprache:	Englisch
veröffentlicht:	4 October 2017
Gesamtaufnahme:	: The European physical journal / C, 77(2017,10) Artikel-Nummer 658, 20 Seiten , volume:77
Quelle:	Verbunddaten SWB Lizenzfreie Online-Ressourcen

Details
Zusammenfassung:	The transverse momentum (pTpTp_\mathrm{T} ) spectra and elliptic flow coefficient (v2v2v_{2}) of deuterons and anti-deuterons at mid-rapidity (\|y\|<0.5\|y\|<0.5\|y\|<0.5) are measured with the ALICE detector at the LHC in Pb-Pb collisions at sNN−−−√sNN\sqrt{s_{\mathrm {NN}}} = 2.76 TeV. The measurement of the pTpTp_\mathrm{T} spectra of (anti-)deuterons is done up to 8 GeV/c/c/c in 0-10% centrality class and up to 6 GeV/c/c/c in 10-20% and 20-40% centrality classes. The v2v2v_{2} is measured in the 0.8 < pTpTp_\mathrm{T} < < <~5 GeV/c/c/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 ππ\pi ±±^{\pm }, K±±^{\pm } and p+p¯¯¯p¯\overline{\mathrm {p}} transverse-momentum spectra and v2v2v_{2} are used to predict the deuteron pTpTp_\mathrm{T} spectra and v2v2v_{2} within the Blast-Wave model. The predictions are able to reproduce the v2v2v_{2} coefficient in the measured pTpTp_\mathrm{T} range and the transverse-momentum spectra for pTpTp_\mathrm{T} > 1.8 GeV/c/c/c within the experimental uncertainties. The measurement of the coalescence parameter B2B2B_2 is performed, showing a pTpTp_\mathrm{T} dependence in contrast with the simplest coalescence model, which fails to reproduce also the measured v2v2v_{2} coefficient. In addition, the coalescence parameter B2B2B_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 v2v2v_{2}(pTpTp_\mathrm{T} ) and the B2B2B_2(pTpTp_\mathrm{T} ) trend.
Beschreibung:	ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch, A. Deisting, P. Glässel, J. Kim, S. Klewin, L. Leardini, J. Mercado Pérez, H. Oeschler, A. Ohlson, Y. Pachmayer, K. Reygers, R. Schicker, M.O. Schmidt, S. Schuchmann, J. Stachel, D.F. Weiser, J. Wilkinson, B. Windelband, A. Zimmermann [und weitere] Gesehen am 27.08.2018
Umfang:	20
ISSN:	1434-6052
DOI:	10.1140/epjc/s10052-017-5222-x