K(892)*resonance production in Au+Au andp+pcollisions atsNN=200GeV

J R Adams ,F Liu,J Ulery,H Jiang,D G Underwood,M Cherney,W T Waggoner,R L Ray,G W Hoffmann,S Timoshenko,Z P Zhang,R Raniwala,A Gupta,L K Mangotra,P Sorensen,C F Moore,W M Zhang,H Zhang,J Klay,D Magestro,S Salur,I M Vasilevski,P G Jones,D Grosnick,T J M Symons,Z Xu,S S Shimanskiy,A Ridiger,S Mahajan,W J Llope,D Cebra,V B Dunin,I Sakrejda,P Filip,T W Henry,B Srivastava,Q Li,E Hjort,T Peitzmann,D P Mahapatra,D Thein,T Tarnowsky,J Seger,J Porter,W Christie,A Wetzler,J G Reid,J M Nelson,T J Humanic,R P Scharenberg,S R Klein,M Calderón De La Barca Sánchez,J N Marx,S Das,J Engelage,R Manweiler,J Baudot,C Roy,L Liu,A Stadnik,M Heinz,B K Nandi,L Ruan,A M Vander Molen,M Potekhin,J Amonett,T Pawlak,A Hirsch,G Odyniec,R Sahoo,J Wu,C J Mcclain,A Meschanin,O D Tsai,J Gans,X L Wang,A A P Suaide,W J Dong,B Stringfellow,Y Li,N Smirnov,S Kabana,H J Crawford,M Van Leeuwen,M J Levine,B Erazmus,E Yamamoto,L C Bland,V V Belaga,L V Nogach,H G Ritter,E Shahaliev,A Billmeier,G Renault,H F Chen,H Long,J P Coffin,A N Zubarev,W W Jacobs,A Ishihara,J M Landgraf,X Z Cai,B D Anderson,J Castillo,D Prindle,S B Nurushev,A V Brandin,A Mischke,S A Voloshin,Z Liu,W R Edwards,M S Ganti,J Lauret,J Balewski,B Mohanty,J C Webb,S Hepplemann,T A Trainor,T Ludlam,J G Cramer,C Li,S Trentalange,T D Gutierrez,Y P Viyogi,R Vernet,Y Wang,J Kiryluk,M G Munhoz,S K Badyal,J W Watson,S V Razin,R Bellwied,S Raniwala,P Jacobs,C Pruneau,A Hamed,T Dietel,W A Love,K Fomenko,D Reichhold,L G Efimov,H S Matis,M Tokarev,A Rose,J Putschke,V Eckardt,C O Blyth,H Caines,V I Kravtsov,G D Westfall,G Sood,T K Nayak,A Urkinbaev,A K Dubey,A Bhasin,K Schweda,L Gaillard,F Du,D Olson,H Bichsel,G Wang,S Chattopadhyay,N Xu,J H Thomas,X Dong,A Kisiel,D Das,R E Tribble,D D Koetke,H Z Huang,M M De Moura,E G Judd,G Van Buren,C Kuhn,R Stock,Q J Liu,O V Rogachevskiy,R Zoulkarneev,R Fatemi,S M Guertin,Y Chen,M A Lisa,J Takahashi,V I Yurevich,B I Bezverkhny,S Lange,Y Zoulkarneeva,J Pluta,M Strikhanov,P Yepes,S C Phatak,L Gaudichet,R S Longacre,Yu A Matulenko,K E Shestermanov,A Boucham,E Potrebenikova,V Perevoztchikov,J Berger,Y Panebratsev,I Savin,T M Cormier,F Wang,M R Dutta Mazumdar,T Kollegger,V Ghazikhanian,A Ogawa,L Kotchenda,T Ullrich,F Laue,T S Mcshane,G Lin,D Hardtke,J L Romero,E W Hughes,R Varma,H Ward,A A Derevschikov,J E Gonzalez,P Ghosh,M M Aggarwal,A Chikanian,W Peryt,J C Dunlop,R Witt,E M Kislov,Y Lu,M Oldenburg,A Bravar,M Botje,Y Bai,D Keane,J Wood,P Chaloupka,M Kopytine,A H Tang,A I Pavlinov,T D S Stanislaus,T J Hallman,O Barannikova,Y Fisyak,S J Lindenbaum,M Estienne,Z M Wang,S Margetis,A Tai,D Lynn,J Speltz,A M Poskanzer,Z Ahammed,M Sarsour,C Mironov,W Shao,M Shao,V Okorokov,W Q Shen,P Fachini,J Faivre,G Rakness,C A Gagliardi,A Lebedev,B E Bonner,R Majka,H M Spinka,O Ravel,A Stolpovsky,S K Nayak,R V Cadman,J Sandweiss,R Picha,P S Sazhin,E Finch,S W Wissink,K Kang,A K Bhati,C Perkins,K Krueger,J W Harris,E Sugarbaker,P Seyboth,C Markert,B Surrow,J E Draper,G S Averichev,J Schambach,P Szarwas,M Kaplan,R Wells,A Szanto De Toledo,B Hippolyte,G Igo,L S Barnby,F Simon,D Arkhipkin,L Didenko,K Filimonov,P K Netrakanti,V S Bhatia,M Lopez-Noriega,J Cheng,N Porile,V Fine,O Grachov,G Eppley,N Schmitz,H Wieman,S Bekele,N G Minaev,C Suire,E P Sichtermann ,Y Zanevsky ,В Емелянов ,D Mishra ,F J M Geurts ,В А Никитин ,Subrata Pal ,B Potukuchi ,А И Куликов ,R Lednický ,O G Grebenyuk ,R.kh Kutuev ,Y G ,M Planinić ,S Panitkin ,J T Mitchell ,M Bysterský ,A Vasiliev ,G L ,Raimond Snellings ,Yuanyuan Guo ,F Retière ,G Škoro ,Yu Melnick ,L M Garcia Martin ,А А Кузнецов ,Arun Kumar ,M A Janik ,S Dogra ,S Huang ,V Yu Khodyrev ,В А Петров ,Д А Морозов ,J G ,П Кравцов ,T Ljubičić ,J Sowiński ,S Lehocká ,M A.c Lamont ,C Whitten ,L Molnár ,F Meißner ,J.b Roberts ,S Vokál ,R Singaraju ,Samarth Bharadwaj ,Meenakshi Sharma ,M Krämer ,J Fedorišin ,S.e Vigdor ,Z Chajęcki ,М Взнуздаев ,M Šumbera ,Michael L Miller ,Jiang Fu

doi:10.1103/physrevc.71.064902

Abstract

The short-lived K(892)* resonance provides an efficient tool to probe properties of the hot and dense medium produced in relativistic heavy-ion collisions. We report measurements of K* in {radical}(s{sub NN})=200 GeV Au+Au and p+p collisions reconstructed via its hadronic decay channels K(892)*{sup 0}{yields}K{pi} and K(892)*{sup {+-}}{yields}K{sub S}{sup 0}{pi}{sup {+-}} using the STAR detector at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. The K*{sup 0} mass has been studied as a function of p{sub T} in minimum bias p+p and central Au+Au collisions. The K* p{sub T} spectra for minimum bias p+p interactions and for Au+Au collisions in different centralities are presented. The K*/K yield ratios for all centralities in Au+Au collisions are found to be significantly lower than the ratio in minimum bias p+p collisions, indicating the importance of hadronic interactions between chemical and kinetic freeze-outs. A significant nonzero K*{sup 0} elliptic flow (v{sub 2}) is observed in Au+Au collisions and is compared to the K{sub S}{sup 0} and {lambda} v{sub 2}. The nuclear modification factor of K* at intermediate p{sub T} is similar to that of K{sub S}{sup 0} but different from {lambda}. This establishes a baryon-meson effect over a mass effect in the particle production atmore » intermediate p{sub T} (2<p{sub T}{<=}4 GeV/c)« less

Full Text