DSpace at EWHA: Neutral pion production with respect to centrality and reaction plane in Au+Au collisions at √sNN=200 GeV

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Neutral pion production with respect to centrality and reaction plane in Au+Au collisions at √sNN=200 GeV

Title: Neutral pion production with respect to centrality and reaction plane in Au+Au collisions at √sNN=200 GeV

Authors: Adare A.; Afanasiev S.; Aidala C.; Ajitanand N.N.; Akiba Y.; Al-Bataineh H.; Alexander J.; Aoki K.; Aramaki Y.; Atomssa E.T.; Averbeck R.; Awes T.C.; Azmoun B.; Babintsev V.; Bai M.; Baksay G.; Baksay L.; Barish K.N.; Bassalleck B.; Basye A.T.; Bathe S.; Baublis V.; Baumann C.; Bazilevsky A.; Belikov S.; Belmont R.; Bennett R.; Berdnikov A.; Berdnikov Y.; Bickley A.A.; Bok J.S.; Boyle K.; Brooks M.L.; Buesching H.; Bumazhnov V.; Bunce G.; Butsyk S.; Camacho C.M.; Campbell S.; Chen C.-H.; Chi C.Y.; Chiu M.; Choi I.J.; Choudhury R.K.; Christiansen P.; Chujo T.; Chung P.; Chvala O.; Cianciolo V.; Citron Z.; Cole B.A.; Connors M.; Constantin P.; Csanad M.; Csorgo T.; Dahms T.; Dairaku S.; Danchev I.; Das K.; Datta A.; David G.; Denisov A.; Deshpande A.; Desmond E.J.; Dietzsch O.; Dion A.; Donadelli M.; Drapier O.; Drees A.; Drees K.A.; Durham J.M.; Durum A.; Dutta D.; Edwards S.; Efremenko Y.V.; Ellinghaus F.; Engelmore T.; Enokizono A.; En'Yo H.; Esumi S.; Fadem B.; Fields D.E.; Finger M.; Fleuret F.; Fokin S.L.; Fraenkel Z.; Frantz J.E.; Franz A.; Frawley A.D.; Fujiwara K.; Fukao Y.; Fusayasu T.; Garishvili I.; Glenn A.; Gong H.; Gonin M.; Goto Y.; Granier De Cassagnac R.; Grau N.; Greene S.V.; Grosse Perdekamp M.; Gunji T.; Gustafsson H.-A.; Haggerty J.S.; Hahn K.I.; Hamagaki H.; Hamblen J.; Han R.; Hanks J.; Hartouni E.P.; Haslum E.; Hayano R.; He X.; Heffner M.; Hemmick T.K.; Hester T.; Hill J.C.; Hohlmann M.; Holzmann W.; Homma K.; Hong B.; Horaguchi T.; Hornback D.; Huang S.; Ichihara T.; Ichimiya R.; Ide J.; Ikeda Y.; Imai K.; Inaba M.; Isenhower D.; Ishihara M.; Isobe T.; Issah M.; Isupov A.; Ivanischev D.; Jacak B.V.; Jia J.; Jin J.; Johnson B.M.; Joo K.S.; Jouan D.; Jumper D.S.; Kajihara F.; Kametani S.; Kamihara N.; Kamin J.; Kang J.H.; Kapustinsky J.; Karatsu K.; Kawall D.; Kawashima M.; Kazantsev A.V.; Kempel T.; Khanzadeev A.; Kijima K.M.; Kim B.I.; Kim D.H.; Kim D.J.; Kim E.; Kim E.-J.; Kim S.H.; Kim Y.J.; Kinney E.; Kiriluk K.; Kiss A.; Kistenev E.; Kochenda L.; Komkov B.; Konno M.; Koster J.; Kotchetkov D.; Kozlov A.; Kral A.; Kravitz A.; Kunde G.J.; Kurita K.; Kurosawa M.; Kwon Y.; Kyle G.S.; Lacey R.; Lai Y.S.; Lajoie J.G.; Lebedev A.; Lee D.M.; Lee J.; Lee K.; Lee K.B.; Lee K.S.; Leitch M.J.; Leite M.A.L.; Leitner E.; Lenzi B.; Li X.; Liebing P.; Linden Levy L.A.; Liska T.; Litvinenko A.; Liu H.; Liu M.X.; Love B.; Luechtenborg R.; Lynch D.; Maguire C.F.; Makdisi Y.I.; Malakhov A.; Malik M.D.; Manko V.I.; Mannel E.; Mao Y.; Masui H.; Matathias F.; McCumber M.; McGaughey P.L.; Means N.; Meredith B.; Miake Y.; Mignerey A.C.; Mikes P.; Miki K.; Milov A.; Mishra M.; Mitchell J.T.; Mohanty A.K.; Morino Y.; Morreale A.; Morrison D.P.; Moukhanova T.V.; Murata J.; Nagamiya S.; Nagle J.L.; Naglis M.; Nagy M.I.; Nakagawa I.; Nakamiya Y.; Nakamura T.; Nakano K.; Newby J.; Nguyen M.; Niida T.; Nouicer R.; Nyanin A.S.; O'Brien E.; Oda S.X.; Ogilvie C.A.; Oka M.; Okada K.; Onuki Y.; Oskarsson A.; Ouchida M.; Ozawa K.; Pak R.; Pantuev V.; Papavassiliou V.; Park I.H.; Park J.; Park S.K.; Park W.J.; Pate S.F.; Pei H.; Peng J.-C.; Pereira H.; Peresedov V.; Peressounko D.Y.; Pinkenburg C.; Pisani R.P.; Proissl M.; Purschke M.L.; Purwar A.K.; Qu H.; Rak J.; Rakotozafindrabe A.; Ravinovich I.; Read K.F.; Reygers K.; Riabov V.; Riabov Y.; Richardson E.; Roach D.; Roche G.; Rolnick S.D.; Rosati M.; Rosen C.A.; Rosendahl S.S.E.; Rosnet P.; Rukoyatkin P.; Ruzicka P.; Sahlmueller B.; Saito N.; Sakaguchi T.; Sakashita K.; Samsonov V.; Sano S.; Sato T.; Sawada S.; Sedgwick K.; Seele J.; Seidl R.; Semenov A.Y.; Seto R.; Sharma D.; Shein I.; Shibata T.-A.; Shigaki K.; Shimomura M.; Shoji K.; Shukla P.; Sickles A.; Silva C.L.; Silvermyr D.; Silvestre C.; Sim K.S.; Singh B.K.; Singh C.P.; Singh V.; Slunecka M.; Soltz R.A.; Sondheim W.E.; Sorensen S.P.; Sourikova I.V.; Sparks N.A.; Stankus P.W.; Stenlund E.; Stoll S.P.; Sugitate T.; Sukhanov A.; Sziklai J.; Takagui E.M.; Taketani A.; Tanabe R.; Tanaka Y.; Tanida K.; Tannenbaum M.J.; Tarafdar S.; Taranenko A.; Tarjan P.; Themann H.; Thomas T.L.; Togawa M.; Toia A.; Tomasek L.; Torii H.; Towell R.S.; Tserruya I.; Tsuchimoto Y.; Vale C.; Valle H.; Van Hecke H.W.; Vazquez-Zambrano E.; Veicht A.; Velkovska J.; Vertesi R.; Vinogradov A.A.; Virius M.; Vrba V.; Vznuzdaev E.; Wang X.R.; Watanabe D.; Watanabe K.; Watanabe Y.; Wei F.; Wei R.; Wessels J.; White S.N.; Winter D.; Wood J.P.; Woody C.L.; Wright R.M.; Wysocki M.; Xie W.; Yamaguchi Y.L.; Yamaura K.; Yang R.; Yanovich A.; Ying J.; Yokkaichi S.; You Z.; Young G.R.; Younus I.; Yushmanov I.E.; Zajc W.A.; Zhang C.; Zhou S.; Zolin L.

Ewha Authors: 한인식; 박일흥

SCOPUS Author ID: 한인식 ; 박일흥

Issue Date: 2013

Journal Title: Physical Review C - Nuclear Physics

ISSN: 0556-2813

Citation: Physical Review C - Nuclear Physics vol. 87, no. 3

Indexed: SCI; SCIE; SCOPUS

Document Type: Article

Abstract: The PHENIX experiment has measured the production of π0s in Au+Au collisions at √sNN = 200 GeV. The new data offer a fourfold increase in recorded luminosity, providing higher precision and a larger reach in transverse momentum, pT, to 20 GeV/c. The production ratio of η/π0 is 0.46±0.01(stat)±0.05(syst), constant with p T and collision centrality. The observed ratio is consistent with earlier measurements, as well as with the p+p and d+Au values. π0 are suppressed by a factor of 5, as in earlier findings. However, with the improved statistical precision a small but significant rise of the nuclear modification factor RAA vs pT, with a slope of 0.0106±0.00290. 0034 (Gev/c)-1, is discernible in central collisions. A phenomenological extraction of the average fractional parton energy loss shows a decrease with increasing pT. To study the path-length dependence of suppression, the π0 yield is measured at different angles with respect to the event plane; a strong azimuthal dependence of the π0 RAA is observed. The data are compared to theoretical models of parton energy loss as a function of the path length L in the medium. Models based on perturbative quantum chromodynamics are insufficient to describe the data, while a hybrid model utilizing pQCD for the hard interactions and anti-de-Sitter space/conformal field theory (AdS/CFT) for the soft interactions is consistent with the data. © 2013 American Physical Society.