在质心能量\(\sqrt{s_{NN}} = 200\) GeV的中心金离子与金离子碰撞中，大横向动量下\(\pi^0\)产生被抑制。
Suppressed pi(0) production at large transverse momentum in central Au+Au collisions at sqrt[s(NN)]=200 GeV.
作者信息
Adler S S, Afanasiev S, Aidala C, Ajitanand N N, Akiba Y, Alexander J, Amirikas R, Aphecetche L, Aronson S H, Averbeck R, Awes T C, Azmoun R, Babintsev V, Baldisseri A, Barish K N, Barnes P D, Bassalleck B, Bathe S, Batsouli S, Baublis V, Bazilevsky A, Belikov S, Berdnikov Y, Bhagavatula S, Boissevain J G, Borel H, Borenstein S, Brooks M L, Brown D S, Bruner N, Bucher D, Buesching H, Bumazhnov V, Bunce G, Burward-Hoy J M, Butsyk S, Camard X, Chai J-S, Chand P, Chang W C, Chernichenko S, Chi C Y, Chiba J, Chiu M, Choi I J, Choi J, Choudhury R K, Chujo T, Cianciolo V, Cobigo Y, Cole B A, Constantin P, d'Enterria D G, David G, Delagrange H, Denisov A, Deshpande A, Desmond E J, Dietzsch O, Drapier O, Drees A, Drees K A, du Rietz R, Durum A, Dutta D, Efremenko Y V, El Chenawi K, Enokizono A, En'yo H, Esumi S, Ewell L, Fields D E, Fleuret F, Fokin S L, Fox B D, Fraenkel Z, Frantz J E, Franz A, Frawley A D, Fung S-Y, Garpman S, Ghosh T K, Glenn A, Gogiberidze G, Gonin M, Gosset J, Goto Y, Granier de Cassagnac R, Grau N, Greene S V, Grosse Perdekamp M, Guryn W, Gustafsson H-A, Hachiya T, Haggerty J S, Hamagaki H, Hansen A G, Hartouni E P, Harvey M, Hayano R, He X, Heffner M, Hemmick T K, Heuser J M, Hibino M, Hill J C, Holzmann W, Homma K, Hong B, Hoover A, Ichihara T, Ikonnikov V V, Imai K, Isenhower L, Ishihara M, Issah M, Isupov A, Jacak B V, Jang W Y, Jeong Y, Jia J, Jinnouchi O, Johnson B M, Johnson S C, Joo K S, Jouan D, Kametani S, Kamihara N, Kang J H, Kapoor S S, Katou K, Kelly S, Khachaturov B, Khanzadeev A, Kikuchi J, Kim D H, Kim D J, Kim D W, Kim E, Kim G-B, Kim H J, Kistenev E, Kiyomichi A, Kiyoyama K, Klein-Boesing C, Kobayashi H, Kochenda L, Kochetkov V, Koehler D, Kohama T, Kopytine M, Kotchetkov D, Kozlov A, Kroon P J, Kuberg C H, Kurita K, Kuroki Y, Kweon M J, Kwon Y, Kyle G S, Lacey R, Ladygin V, Lajoie J G, Lebedev A, Leckey S, Lee D M, Lee S, Leitch M J, Li X H, Lim H, Litvinenko A, Liu M X, Liu Y, Maguire C F, Makdisi Y I, Malakhov A, Manko V I, Mao Y, Martinez G, Marx M D, Masui H, Matathias F, Matsumoto T, McGaughey P L, Melnikov E, Messer F, Miake Y, Milan J, Miller T E, Milov A, Mioduszewski S, Mischke R E, Mishra G C, Mitchell J T, Mohanty A K, Morrison D P, Moss J M, Mühlbacher F, Mukhopadhyay D, Muniruzzaman M, Murata J, Nagamiya S, Nagle J L, Nakamura T, Nandi B K, Nara M, Newby J, Nilsson P, Nyanin A S, Nystrand J, O'Brien E, Ogilvie C A, Ohnishi H, Ojha I D, Okada K, Ono M, Onuchin V, Oskarsson A, Otterlund I, Oyama K, Ozawa K, Pal D, Palounek A P T, Pantuev V S, Papavassiliou V, Park J, Parmar A, Pate S F, Peitzmann T, Peng J-C, Peresedov V, Pinkenburg C, Pisani R P, Plasil F, Purschke M L, Purwar A K, Rak J, Ravinovich I, Read K F, Reuter M, Reygers K, Riabov V, Riabov Y, Roche G, Romana A, Rosati M, Rosnet P, Ryu S S, Sadler M E, Saito N, Sakaguchi T, Sakai M, Sakai S, Samsonov V, Sanfratello L, Santo R, Sato H D, Sato S, Sawada S, Schutz Y, Semenov V, Seto R, Shaw M R, Shea T K, Shibata T-A, Shigaki K, Shiina T, Silva C L, Silvermyr D, Sim K S, Singh C P, Singh V, Sivertz M, Soldatov A, Soltz R A, Sondheim W E, Sorensen S P, Sourikova I V, Staley F, Stankus P W, Stenlund E, Stepanov M, Ster A, Stoll S P, Sugitate T, Sullivan J P, Takagui E M, Taketani A, Tamai M, Tanaka K H, Tanaka Y, Tanida K, Tannenbaum M J, Tarján P, Tepe J D, Thomas T L, Tojo J, Torii H, Towell R S, Tserruya I, Tsuruoka H, Tuli S K, Tydesjö H, Tyurin N, van Hecke H W, Velkovska J, Velkovsky M, Villatte L, Vinogradov A A, Volkov M A, Vznuzdaev E, Wang X R, Watanabe Y, White S N, Wohn F K, Woody C L, Xie W, Yang Y, Yanovich A, Yokkaichi S, Young G R, Yushmanov I E, Zajc W A, Zhang C, Zhou S, Zolin L
机构信息
Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
出版信息
Phys Rev Lett. 2003 Aug 15;91(7):072301. doi: 10.1103/PhysRevLett.91.072301. Epub 2003 Aug 13.
Transverse momentum spectra of neutral pions in the range 1<p(T)<10 GeV/c have been measured at midrapidity by the PHENIX experiment at BNL RHIC in Au+Au collisions at sqrt[s(NN)]=200 GeV. The pi(0) multiplicity in central reactions is significantly below the yields measured at the same sqrt[s(NN)] in peripheral Au+Au and p+p reactions scaled by the number of nucleon-nucleon collisions. For the most central bin, the suppression factor is approximately 2.5 at p(T)=2 GeV/c and increases to approximately 4-5 at p(T) approximately 4 GeV/c. At larger p(T), the suppression remains constant within errors. The deficit is already apparent in semiperipheral reactions and increases smoothly with centrality.
在布鲁克海文国家实验室相对论重离子对撞机（BNL RHIC）的PHENIX实验中，测量了在质心能量(\sqrt{s_{NN}} = 200) GeV的金金碰撞中，横动量(1 < p_T < 10) GeV/c范围内中性π介子的横动量谱。中心反应中π⁰的多重数显著低于在相同(\sqrt{s_{NN}})下，通过核子 - 核子碰撞数进行标度的外围金金和质子 - 质子反应中测量的产额。对于最中心的区间，在(p_T = 2) GeV/c时抑制因子约为2.5，在(p_T \approx 4) GeV/c时增加到约4 - 5。在更大的(p_T)时，在误差范围内抑制保持恒定。这种亏损在半外围反应中已经很明显，并随着中心度的增加而平滑增加。
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