K/πFluctuations at Relativistic Energies

B I Abelev,F Simon,H Zbroszczyk,J H Chen,X Wang,Z Xu,S Mioduszewski,E Hjort,M Tokarev,H Bichsel,D Olson,C Pruneau,B Haag,A Ridiger,J Baudot,S B Nurushev,B E Bonner,R Reed,D Keane,W Korsch,R F Clarke,T Ludlam,J A Vanfossen,R Fatemi,S Salur,P Djawotho,O Catu,H Z Huang,N Gupta,B D Anderson,A R Timmins,P Chaloupka,M J Russcher,A M Hoffman,A Szanto De Toledo,K Yip,J Kiryluk,E P Sichtermann,P Sorensen,N G Minaev,H J Crawford,Y Pandit,S Das,A V Brandin,S J Lindenbaum,X Z Cai,A Gupta,M Pachr,D R Gangadharan,D Plyku,T G Dedovich,V I Kravtsov,A M Poskanzer,G Webb,R P Scharenberg,J S Wang,D Das,G Odyniec,S R Klein,G Igo,M M Aggarwal,P Ghosh,N Xu,J Ulery,J G Cramer,W R Edwards,J Liu,J W Harris,M J Levine,A Gordon,R Derradi De Souza,M Van Leeuwen,Y Zhang,J Kapitan,S E Vigdor,R Manweiler,R Corliss,C Li,C L Jones,O Barannikova,M Walker,O D Tsai,Y Fisyak,J L Drachenberg,J C Dunlop,R Majka,R Varma,N Li,Y Xu,A G Knospe,B Mohanty,J Seger,J Lauret,J Takahashi,M Strikhanov,W Xie,J Sandweiss,V Kouchpil,L H Tarini,J M Landgraf,V Ghazikhanian,P Kurnadi,R Zoulkarneev,Y Panebratsev,A Rose,E Braidot,F Jin,L Liu,V Okorokov,W Peryt,E Shahaliev,G Eppley,S Lapointe,S Chattopadhyay,V N Tram,R R Betts,W M Zhang,H Caines,Q Yue,D Staszak,M R Dutta Mazumdar,C.-H Lee,T J M Symons,J Bouchet,M Kopytine,R Redwine,G W Hoffmann,A Shabetai,J Schambach,R Witt,N Schmitz,R Cendejas,B Erazmus,T K Nayak,D Cebra,P R Pujahari,P Jakl,J Tian,A Meschanin,B Biritz,S Timoshenko,S Trentalange,V Fine,M C Suarez,M J Skoby,N Smirnov,S M Guertin,A H Tang,T J Hallman,A M Vander Molen,P K Netrakanti,M Sarsour,Yu A Matulenko,G S Averichev,X Dong,R Bellwied,J Pluta,L Kumar,W He,M Zawisza,M Wada,P Yepes,Y Zhao,D Thein,W A Love,A Feng,P Pile,T M Cormier,W Guryn,J Cheng,Y Wang,Y N Gorbunov,B Stringfellow,H Okada,Y Lu,H S Matis,C Whitten,L C De Silva,S Dash,S A Voloshin,S W Wissink,M Calderón De La Barca Sánchez,L Didenko,X P Zhang,L Ruan,L Eun,S C Phatak,Y Wu,V Perevoztchikov,L G Efimov,D Prindle,M Heinz,L V Nogach,A Ogawa,B Grube,R Sahoo,I M Vasilevski,P Yang,J Balewski,L C Bland,N L Subba,T S Mcshane,M A Lisa,K Kang,J M Nelson,B S Page,A K Bhati,A Hirsch,T J Humanic,D Tlusty,M S Ganti,B Surrow,J Joseph,C Perkins,D G Underwood,Q Wang,Y Zoulkarneeva,C Nattrass,J E Draper,A Bhasin,A Mischke,G Lin,Y Li,M Botje,G Van Buren,F Benedosso,D Grosnick,T Ullrich,E Finch,J Engelage,D P Mahapatra,M Cherney,A Lebedev,C Kuhn,S Raniwala,A Chikanian,P Jacobs,S Margetis,I Sakrejda,J C Webb,W Zhan,M R Cosentino,X M Sun,E Elhalhuli,M G Munhoz,S Heppelmann,Z P Zhang,M J M Codrington,R Milner,C Jena,E G Judd,R S Longacre,J Y Chen,L S Barnby,S Kabana,B Srivastava,I Selyuzhenkov,A Hamed,M Shao,X L Wang,S Bueltmann,J X Zuo,K Krueger,N K Pruthi,M Daugherity,R E Tribble,C Markert,M Dephillips,Z Sun,Z Tang,L Kotchenda,E Bruna,P G Jones,A Kechechyan,A A Derevschikov,A Kisiel,O V Rogachevskiy,R S Hollis,R Raniwala,A Iordanova,D D Koetke,W W Jacobs,S K Pal,S S Shi,D Arkhipkin,J Putschke,T D S Stanislaus,D Mcdonald,H F Chen,M J Ng,A Kocoloski,Y P Viyogi,J L Romero,M Bombara,W J Llope,Q H Xu,T Pawlak,Z Ahammed,F Liu,W Christie,L Gaillard,L Huo,T Tarnowsky,P Seyboth,G D Westfall,P Filip,G Wang,T P Burton,B Hippolyte,K Kajimoto,B K Nandi,S Zhang,C Roy,J H Thomas,M C Cervantes,F Wang,M Elnimr,A Geromitsos,L K Mangotra,T Peitzmann,N Poljak,T Sakuma,M Estienne,P Fachini,J H Lee,A Stadnik,H Wieman,C A Gagliardi,D J Hofman,J Bielčík ,D P Kikoła ,David Kettler ,S Dogra ,A Vasiliev ,Д А Морозов ,M Betancourt ,K Choi ,Jing Zhou ,Y J Sun ,E García-Solis ,G M.s Vasconcelos ,W A Leight ,M Planinić ,Alexander Trattner ,J.b Roberts ,T Ljubičić ,F Videbæk ,M Krůs ,M Šumbera ,I K Yoo ,M Bysterský ,В Емелянов ,B Potukuchi ,R Lednický ,R Singaraju ,M A.c Lamont ,X Shi ,J Sowiński ,Z Chajęcki ,Raimond Snellings ,G L ,П Кравцов ,H Spinka ,J Bielčíková ,Stephen Baumgart ,Y G ,O G Grebenyuk ,D Beavis ,K S.f.f Guimaraes ,S Vokál ,V Yu Khodyrev ,Meenakshi Sharma ,Zhong Chen ,H.g Ritter ,O Mall ,J Fedorišin ,Alexandre Alarcon Do Passo Suaide ,F J M Geurts

doi:10.1103/physrevlett.103.092301

Abstract

We report K/pi fluctuations from Au + Au collisions at sqrt[s(NN)]= 19.6, 62.4, 130, and 200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. K/pi fluctuations in central collisions show little dependence on incident energy and are on the same order as those from NA49 at the Super Proton Synchrotron in central Pb + Pb collisions at sqrt[s(NN)]=12.3 and 17.3 GeV. We report results for the collision centrality dependence of K/pi fluctuations and results for charge-separated fluctuations. We observe that the K/pi fluctuations scale with the charged particle multiplicity density.

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