Identified hadron compositions in p+p and Au+Au collisions at high transverse momenta at √S(NN)=200 GeV.

Agakishiev G,Aggarwal M M,Ahammed Z, Alakhverdyants A V,Alekseev I,Alford J, Anderson B D,Anson C D,Arkhipkin D,Averichev G S,Balewski J,Barnby L S,Beavis D R,Bellwied R, Betancourt M J,Betts R R,Bhasin A,Bhati A K,Bichsel H,Bielcik J,Bielcikova J,Bland L C,Bordyuzhin I G,Borowski W,Bouchet J,Braidot E,Brandin A V,Brovko S G,Bruna E,Bueltmann S,Bunzarov I,Burton T P,Cai X Z,Caines H,Sánchez M Calderón de la Barca,Cebra D,Cendejas R,Cervantes M C,Chaloupka P,Chattopadhyay S,Chen H F,Chen J H,Chen J Y,Chen L,Cheng J,Cherney M, Chikanian A,Christie W, Chung P,Codrington M J M,Corliss R, Cramer J G,Crawford H J, Cui X,Leyva A Davila,De Silva L C,Debbe R R,Dedovich T G,Deng J, Derevschikov A A,de Souza R Derradi,Didenko L,Djawotho P,Dong X,Drachenberg J L, Draper J E,Du C M,Dunlop J C,Efimov L G,Elnimr M,Engelage J,Eppley G,Estienne M, Eun L,Evdokimov O,Fachini P,Fatemi R,Fedorisin J, Fersch R G,Filip P,Finch E, Fine V,Fisyak Y,Gagliardi C A, Gangadharan D R,Geurts F,Ghosh P,Gorbunov Y N, Gordon A,Grebenyuk O G,Grosnick D,Gupta A,Gupta S,Guryn W,Haag B,Hajkova O,Hamed A,Han L-X,Harris J W,Hays-Wehle J P, Heppelmann S, Hirsch A,Hoffmann G W,Hofman D J,Huang B, Huang H Z, Humanic T J, Huo L, Igo G,Jacobs W W, Jena C,Joseph J, Judd E G,Kabana S,Kang K, Kapitan J,Kauder K,Ke H W,Keane D,Kechechyan A, Kettler D,Kikola D P, Kiryluk J,Kisiel A, Kizka V, Klein S R, Koetke D D, Kollegger T, Konzer J, Koralt I, Koroleva L, Korsch W, Kotchenda L, Kravtsov P,Krueger K,Kumar L, Lamont M A C, Landgraf J M,LaPointe S, Lauret J, Lebedev A,Lednicky R,Lee J H,Leight W, LeVine M J,Li C,Li L,Li W,Li X,Li Y,Li Z M, Lima L M, Lisa M A,Liu F, Ljubicic T, Llope W J, Longacre R S, Lu Y, Lukashov E V,Luo X,Ma G L, Ma Y G, Mahapatra D P, Majka R, Mall O I, Margetis S, Markert C,Masui H, Matis H S,McDonald D, McShane T S, Meschanin A,Milner R,Minaev N G,Mioduszewski S, Mitrovski M K, Mohammed Y, Mohanty B,Mondal M M, Morozov B,Morozov D A, Munhoz M G,Mustafa M K, Naglis M,Nandi B K,Nasim Md,Nayak T K, Nogach L V,Nurushev S B,Odyniec G,Ogawa A,Oh K,Ohlson A,Okorokov V, Oldag E W, Oliveira R A N, Olson D, Pachr M,Page B S,Pal S K,Pandit Y,Panebratsev Y, Pawlak T,Pei H, Peitzmann T,Perkins C, Peryt W,Pile P,Planinic M,Pluta J, Plyku D,Poljak N,Porter J,Poskanzer A M, Powell C B, Prindle D, Pruneau C,Pruthi N K,Pujahari P R,Putschke J,Qiu H, Raniwala R,Raniwala S,Ray R L,Redwine R,Reed R,Ritter H G,Roberts J B,Rogachevskiy O V,Romero J L,Ruan L,Rusnak J,Sahoo N R,Sakrejda I,Salur S,Sandweiss J, Sangaline E,Sarkar A,Schambach J,Scharenberg R P,Schmah A M,Schmitz N, Schuster T R, Seele J,Seger J, Selyuzhenkov I,Seyboth P,Shah N,Shahaliev E, Shao M,Sharma M,Shi S S,Shou Q Y,Sichtermann E P,Simon F, Singaraju R N,Skoby M J,Smirnov N, Solanki D,Sorensen P, deSouza U G,Spinka H M,Srivastava B,Stanislaus T D S,Steadman S G, Stevens J R,Stock R,Strikhanov M,Stringfellow B, Suaide A A P, Suarez M C, Sumbera M,Sun X M,Sun Y,Sun Z,Surrow B,Svirida D N, Symons T J M,de Toledo A Szanto, Takahashi J,Tang A H,Tang Z, Tarini L H,Tarnowsky T, Thein D,Thomas J H, Tian J,Timmins A R,Tlusty D,Tokarev M, Trainor T A,Trentalange S,Tribble R E,Tribedy P, Trzeciak B A,Tsai O D,Ullrich T,Underwood D G,Van Buren G,van Nieuwenhuizen G, Vanfossen J A,Varma R,Vasconcelos G M S,Vasiliev A N,Videbæk F,Viyogi Y P,Vokal S,Voloshin S A, Wada M,Walker M,Wang F, Wang G, Wang H,Wang J S,Wang Q,Wang X L, Wang Y,Webb G,Webb J C, Westfall G D, Whitten C, Wieman H, Wissink S W, Witt R, Witzke W,Wu Y F,Xiao Z,Xie W, Xu H,Xu N,Xu Q H,Xu W, Xu Y,Xu Z,Xue L, Yang Y, Yepes P,Yip K,Yoo I-K, Zawisza M,Zbroszczyk H, Zhan W,Zhang J B,Zhang S, Zhang W M,Zhang X P,Zhang Y, Zhang Z P,Zhao F,Zhao J,Zhong C,Zhu X, Zhu Y H,Zoulkarneeva Y, Null Null

Physical review letters（2012）

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摘要

We report transverse momentum (p(T)≤15 GeV/c) spectra of π(±), K(±), p, p[over ¯], K(S)(0), and ρ(0) at midrapidity in p+p and Au+Au collisions at √S(NN)=200 GeV. Perturbative QCD calculations are consistent with π(±) spectra in p+p collisions but do not reproduce K and p(p[over ¯]) spectra. The observed decreasing antiparticle-to-particle ratios with increasing p(T) provide experimental evidence for varying quark and gluon jet contributions to high-p(T) hadron yields. The relative hadron abundances in Au+Au at p(T)≳8 GeV/c are measured to be similar to the p+p results, despite the expected Casimir effect for parton energy loss.

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