Naslov
Measurements of mass-dependent azimuthal anisotropy in central p+Au, d+Au, and 3He+Au collisions at root(s)NN=200 GeV

Autori
Adare, A. ; ... ; Makek, Mihael ; ... ; Vukman, Nikola ; ... ; Zou, L.

Kolaboracija
PHENIX Collaboration

Izvornik
Physical review. C (2469-9985) 97 (2018), 6; 064904, 11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
azimuthal anisotropy ; small systems ; 200 GeV ; PHENIX ; RHIC

Sažetak
We present measurements of the transverse- momentum dependence of elliptic flow v2 for identified pions and (anti)protons at midrapidity (|η|<0.35), in 0%–5% central p+Au and He3+Au collisions at sNN=200 GeV. When taken together with previously published measurements in d+Au collisions at sNN=200 GeV, the results cover a broad range of small-collision-system multiplicities and intrinsic initial geometries. We observe a clear mass-dependent splitting of v2(pT) in d+Au and He3+Au collisions, just as in large nucleus-nucleus (A+A) collisions, and a smaller splitting in p+Au collisions. Both hydrodynamic and transport model calculations successfully describe the data at low pT (<1.5GeV/c), but fail to describe various features at higher pT. In all systems, the v2 values follow an approximate quark-number scaling as a function of the hadron transverse kinetic energy per constituent quark (KET/nq), which was also seen previously in A+A collisions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA