Beam-energy dependence of the directed flow of deuterons in Au+Au collisions

• Verfasst von: Adam, Jaroslav [VerfasserIn]
• Verfasst von: Deppner, Ingo Martin [VerfasserIn]
• Verfasst von: Herrmann, Norbert [VerfasserIn]
• Verfasst von: Weidenkaff, Philipp [VerfasserIn]
• Titel: Beam-energy dependence of the directed flow of deuterons in Au+Au collisions
• Körperschaft: STAR Collaboration [VerfasserIn]
• Verf.angabe: J. Adam, I.M. Deppner, N. Herrmann, P.C. Weidenkaff [und 359 weitere] (STAR Collaboration)
• E-Jahr: 2020
• Jahr: 16 October 2020
• Umfang: 8 S.
• Fussnoten: Gesehen am 21.01.2021
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2020
• Band/Heft Quelle: 102(2020,4) Artikel-Nummer 044906, 8 Seiten
• ISSN Quelle: 2469-9993
• DOI: doi:10.1103/PhysRevC.102.044906
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 174515468X

Abstract

We present a measurement of the first-order azimuthal anisotropy v1 of deuterons from Au+Au collisions at √sNN=7.7, 11.5, 14.5, 19.6, 27, and 39 GeV recorded with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The energy dependence of the v1(y) slope, dv1/dy|y=0, for deuterons, where y is the rapidity, is extracted for semicentral collisions (10%-40% centrality) and compared with that of protons. While the v1(y) slopes of protons are generally negative for √sNN>10GeV, those for deuterons are consistent with zero, a strong enhancement of the v1(y) slope of deuterons is seen at the lowest collision energy (the largest baryon density) at √sNN=7.7GeV. In addition, we report the transverse momentum dependence of v1 for protons and deuterons. The experimental results are compared with transport and coalescence models.