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Measurements of azimuthal anisotropy and charged-particle multiplicity in d + Au collisions at s NN =200, 62.4, 39, and 19.6 GeV

Title
Measurements of azimuthal anisotropy and charged-particle multiplicity in d + Au collisions at s NN =200, 62.4, 39, and 19.6 GeV
Authors
Aidala C.Akiba Y.Alfred M.Aoki K.Apadula N.Ayuso C.Babintsev V.Bagoly A.Barish K.N.Bathe S.Bazilevsky A.Belmont R.Berdnikov A.Berdnikov Y.Blau D.S.Boer M.Bok J.S.Brooks M.L.Bryslawskyj J.Bumazhnov V.Butler C.Campbell S.Canoa Roman V.Chi C.Y.Chiu M.Connors M.Csanád M.Csörgo T.Danley T.W.Daugherity M.S.David G.Deblasio K.Dehmelt K.Denisov A.Deshpande A.Desmond E.J.Do J.H.Drees A.Drees K.A.Dumancic M.Durham J.M.Durum A.Elder T.Enokizono A.Esumi S.Fadem B.Fan W.Feege N.Fields D.E.Finger M.Jr.Fokin S.L.Frantz J.E.Franz A.Frawley A.D.Fukuda Y.Gal C.Gallus P.Garg P.Ge H.Goto Y.Grau N.Greene S.V.Gunji T.Hachiya T.Haggerty J.S.Hahn K.I.Han S.Y.Hasegawa S.Haseler T.O.S.He X.Hemmick T.K.Hill K.Hodges A.Homma K.Hong B.Hoshino T.Hotvedt N.Huang J.Huang S.Imrek J.Inaba M.Isenhower D.Ito Y.Ivanishchev D.Jacak B.V.Ji Z.Johnson B.M.Jorjadze V.Jouan D.Jumper D.S.Kang J.H.Kapukchyan D.Karthas S.Kazantsev A.V.Khachatryan V.Khanzadeev A.Kim C.Kim D.J.Kim E.-J.Kim M.Kim M.H.Kincses D.Kistenev E.Koblesky T.Kotov D.Kudo S.Kurita K.Lajoie J.G.Lallow E.O.Lebedev A.Lee S.H.Leitch M.J.Leung Y.H.Lewis N.A.Li X.Lim S.H.Liu L.D.Liu M.X.Loggins V.-R.Lökös S.Lynch D.Majoros T.Makek M.Malaev M.Manko V.I.Mannel E.Masuda H.McCumber M.McGlinchey D.Metzger W.J.Mignerey A.C.Mihalik D.E.Milov A.Mishra D.K.Mitchell J.T.Mitsuka G.Moon T.Morrison D.P.Morrow S.I.M.Murakami T.Murata J.Nagai K.Nagashima K.Nagashima T.Nagle J.L.Nagy M.I.Nakagawa I.Nakagomi H.Nakano K.Nattrass C.Nouicer R.Novák T.Novitzky N.Novotny R.Nyanin A.S.O'Brien E.Ogilvie C.A.Orjuela Koop J.D.Osborn J.D.Oskarsson A.Ozawa K.Pantuev V.Papavassiliou V.Park J.S.Park S.Pate S.F.Patel M.Peng W.Perepelitsa D.V.Perera G.D.N.Perezlara C.E.Petti R.Phipps M.Pinkenburg C.Pun A.Purschke M.L.Radzevich P.V.Read K.F.Riabov V.Riabov Y.Richford D.Rinn T.Rosati M.Rowan Z.Runchey J.Sakaguchi T.Sako H.Samsonov V.Sarsour M.Sato K.Sato S.Schaefer B.Schmoll B.K.Seidl R.Sen A.Seto R.Sexton A.Sharma D.Shein I.Shibata T.-A.Shigaki K.Shimomura M.Silva C.L.Silvermyr D.Skoby M.J.Slunečka M.Smith K.L.Soltz R.A.Sorensen S.P.Sourikova I.V.Stankus P.W.Stoll S.P.Sugitate T.Sukhanov A.Syed S.Takeda A.Tanida K.Tannenbaum M.J.Tarafdar S.Taranenko A.Tarnai G.Tieulent R.Timilsina A.Tomášek M.Towell C.L.Towell R.S.Tserruya I.Ueda Y.Ujvari B.Van Hecke H.W.Vazquez-Carson S.Velkovska J.Virius M.Vrba V.Wang X.R.Wang Z.Watanabe Y.Wong C.P.Xu C.Xu Q.Yamaguchi Y.L.Yanovich A.Yin P.Yoo J.H.Yoon I.Yu H.Yushmanov I.E.Zajc W.A.Zharko S.Zou L.
Ewha Authors
한인식
SCOPUS Author ID
한인식scopus
Issue Date
2017
Journal Title
Physical Review C
ISSN
2469-9985JCR Link
Citation
Physical Review C vol. 96, no. 6
Publisher
American Physical Society
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
We present measurements of the elliptic flow (v2) as a function of transverse momentum (pT), pseudorapidity (η), and centrality in d+Au collisions at sNN=200, 62.4, 39, and 19.6 GeV. The beam-energy scan of d+Au collisions provides a testing ground for the onset of flow signatures in small collision systems. We measure a nonzero v2 signal at all four collision energies, which, at midrapidity and low pT, is consistent with predictions from viscous hydrodynamic models. Comparisons with calculations from parton transport models (based on the ampt Monte Carlo generator) show good agreement with the data at midrapidity to forward (d-going) rapidities and low pT. At backward (Au-going) rapidities and pT>1.5GeV/c, the data diverges from ampt calculations of v2 relative to the initial geometry, indicating the possible dominance of nongeometry related correlations, referred to as nonflow. We also present measurements of the charged-particle multiplicity (dNch/dη) as a function of η in central d+Au collisions at the same energies. We find that in d+Au collisions at sNN=200 GeV the v2 scales with dNch/dη over all η in the PHENIX acceptance. At sNN=62.4, and 39 GeV, v2 scales with dNch/dη at midrapidity and forward rapidity, but falls off at backward rapidity. This departure from the dNch/dη scaling may be a further indication of nonflow effects dominating at backward rapidity. © 2017 American Physical Society.
DOI
10.1103/PhysRevC.96.064905
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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