Strangeness Enhancement in Cu-Cu and Au-Au Collisions atsNN=200  GeV

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

doi:10.1103/physrevlett.108.072301

Abstract

We report new STAR measurements of midrapidity yields for the Λ, Λ[over ¯], K(S)(0), Ξ(-), Ξ[over ¯](+), Ω(-), Ω[over ¯](+) particles in Cu+Cu collisions at √S(NN)==200 GeV, and midrapidity yields for the Λ, Λ[over ¯], K(S)(0) particles in Au+Au at √S(NN)==200 GeV. We show that, at a given number of participating nucleons, the production of strange hadrons is higher in Cu+Cu collisions than in Au+Au collisions at the same center-of-mass energy. We find that aspects of the enhancement factors for all particles can be described by a parametrization based on the fraction of participants that undergo multiple collisions.

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