Energy and system size dependence of phi meson production in Cu+Cu and Au+Au collisions
Energy and system size dependence of phi meson production in Cu+Cu and Au+Au collisions
复制标题
DOI：
10.1016/j.physletb.2009.02.037
复制
发表时间：
2009-03
期刊：
影响因子：
--
通讯作者：
B. Abelev;M. Aggarwal;Z. Ahammed;B. Anderson;D. Arkhipkin;G. S. Averichev;Y. Bai;J. Balewski;O. Barannikova;L. Barnby;J. Baudot;S. Baumgart;D. Beavis;R. Bellwied;F. Benedosso;M. Betancourt;R. Betts;S. Bharadwaj;A. Bhasin;A. Bhati;H. Bichsel;J. Bielcik;J. Bielčíková;B. Biritz;L. Bland;M. Bombara;B. Bonner;M. Botje;J. Bouchet;E. Braidot;A. Brandin;E. Bruna;S. Bueltmann;T. Burton;M. Bysterský;X. Cai;H. Caines;M. Sánchez;J. Callner;O. Catu;D. Cebra;R. Cendejas;M. Cervantes;Z. Chajecki;P. Chaloupka;S. Chattopadhyay;H. F. Chen;J. Chen;Jin Chen;J. Cheng;M. Cherney;A. Chikanian;K. Choi;W. Christie;S. Chung;R. Clarke;M. Codrington;J. Coffin;R. Corliss;T. Cormier;M. R. Cosentino;J. Cramer;H. Crawford;D. Das;S. Dash;M. Daugherity;C. D. Silva;T. Dedovich;M. Dephillips;A. Derevschikov;R. D. Souza;L. Didenko;P. Djawotho;S. Dogra;X. Dong;J. Drachenberg;J. Draper;F. Du;J. Dunlop;M. Mazumdar;W. Edwards;L. Efimov;E. Elhalhuli;M. Elnimr;V. Emelianov;J. Engelage;G. Eppley;B. Erazmus;M. Estienne;L. Eun;P. Fachini;R. Fatémi;J. Fedorišin;A. Feng;P. Filip;E. Finch;V. Fine;Y. Fisyak;C. Gagliardi;L. Gaillard;D. Gangadharan;M. Ganti;E. Garcia-Solis;V. Ghazikhanian;P. Ghosh;Y. Gorbunov;A. Gordon;O. Grebenyuk;D. Grosnick;B. Grube;S. Guertin;K. Guimaraes;A. Gupta;N. Gupta;W. Guryn;B. Haag;T. Hallman;Ahmed M. Hamed;J. Harris;W. He;M. Heinz;S. Hepplemann;B. Hippolyte;A. Hirsch;E. Hjort;A. M. Hoffman;G. Hoffmann;D. Hofman;R. Hollis;H. Huang;T. Humanic;G. Igo;A. Iordanova;P. Jacobs;W. W. Jacobs-W.;P. Jakl;F. Jin;C. Jones;P. Jones;J. Joseph;E. Judd;S. Kabana;K. Kajimoto;K. Kang;J. Kapitán;M. Kaplan;D. Keane;A. Kechechyan;D. Kettler;V. Khodyrev;D. Kikoła;J. Kiryluk;A. Kisiel;S. Klein;A. Knospe;A. Kocoloski;D. Koetke;M. Kopytine;L. Kotchenda;V. Kouchpil;P. Kravtsov;V. Kravtsov;K. Krueger;M. Krůs;C. Kuhn;L. Kumar;P. Kurnadi;M. Lamont;J. Landgraf;S. Lapointe;J. Lauret;A. Lebedev;R. Lednický;C. Lee;W. Leight;M. Levine;C. Li;Y. Li;G. Lin;Xu Lin;S. Lindenbaum;M. Lisa;F. Liu;H. Liu;J. Liu;L. Liu;T. Ljubičić;W. Llope;R. Longacre;W. Love;Yuerui Lu;T. Ludlam;D. Lynn;G. Ma;Y. Ma;D. P. Mahapatra;R. Majka;O. Mall;L. Mangotra;R. Manweiler;S. Margetis;C. Markert;H. Matis;Y. Matulenko;T. McShane;A. Meschanin;R. Millner;N. Minaev;S. Mioduszewski;A. Mischke;J. Mitchell;B. Mohanty;B. Mohanty;D. A. Morozov;M. Munhoz;B. Nandi;C. Nattrass;T. Nayak;J. Nelson;C. Nepali;P. Netrakanti;M. Ng;L. Nogach;S. Nurushev;G. Odyniec;A. Ogawa;H. Okada;V. Okorokov;D. Olson;M. Pachr;B. Page;S. Pal;Y. Pandit;Y. Panebratsev;T. Pawlak;T. Peitzmann;V. Perevoztchikov;C. Perkins;W. Peryt;S. C. Phatak;M. Planinić;J. Pluta;N. Poljak;A. Poskanzer;B. Potukuchi;D. Prindle;C. Pruneau;N. Pruthi;J. Putschke;R. Raniwala;S. Raniwala;R. Ray;R. Redwine;R. Reed;A. Ridiger;H. Ritter;J. Roberts;O. Rogachevskiy;J. Romero;A. Rose;C. Roy;L. Ruan;M. Russcher;V. Rykov;R. Sahoo;I. Sakrejda;T. Sakuma;S. Salur;J. Sandweiss;M. Sarsour;I. Savin;J. Schambach;R. Scharenberg;N. Schmitz;J. Seger;I. Selyuzhenkov;P. Seyboth;A. Shabetai;E. Shahaliev;M. Shao;M. Sharma;S. Shi;X. Shi;E. Sichtermann;F. Simon;R. Singaraju;M. Skoby;N. Smirnov;R. Snellings;P. Sorensen;J. Sowinski;H. Spinka;B. Srivastava;A. Stadnik;T. Stanislaus;D. Staszak;M. Strikhanov;B. Stringfellow;A. Suaide;M. Suárez;N. L. Subba;M. Šumbera;Xiang Sun;Yongjie Sun;Zhi Sun;B. Surrow;T. Symons;A. D. Toledo;J. Takahashi;A. Tang;Z. Tang;T. Tarnowsky;D. Thein;J. Thomas;J. Tian;A. Timmins;S. Timoshenko;D. Tlustý;M. Tokarev;T. Trainor;V. Tram;A. L. Trattner;S. Trentalange;R. Tribble;O. Tsai;J. Ulery;T. Ullrich;D. Underwood;G. Buren;M. Leeuwen;A. M. Molen;J. Vanfossen;R. Varma;G. Vasconcelos;I. Vasilevski;A. Vasiliev;F. Videbæk;S. Vigdor;Y. Viyogi;S. Vokál;S. Voloshin;M. Wada;W. Waggoner;M. Walker;F. Wang;Gang Wang;J. Wang;Q. Wang;X. Wang;X. Wang;Yang Wang;J. Webb;G. Westfall;C. Whitten;H. Wieman;S. Wissink;R. Witt;Y. Wu;N. Xu;Q. Xu;Yang Xu;Zhongbin Xu;P. Yepes;I. Yoo;Qian Yue;M. Zawisza;H. Zbroszczyk;W. Zhan;Hui Zhang;Song Zhang;W. M. Zhang;Yang Zhang;Z. Zhang;Y. Zhao;C. Zhong;J. Zhou;R. Zoulkarneev;Y. Zoulkarneeva;J. Zuo
中科院分区：
文献类型：
--
作者：
B. Abelev;M. Aggarwal;Z. Ahammed;B. Anderson;D. Arkhipkin;G. S. Averichev;Y. Bai;J. Balewski;O. Barannikova;L. Barnby;J. Baudot;S. Baumgart;D. Beavis;R. Bellwied;F. Benedosso;M. Betancourt;R. Betts;S. Bharadwaj;A. Bhasin;A. Bhati;H. Bichsel;J. Bielcik;J. Bielčíková;B. Biritz;L. Bland;M. Bombara;B. Bonner;M. Botje;J. Bouchet;E. Braidot;A. Brandin;E. Bruna;S. Bueltmann;T. Burton;M. Bysterský;X. Cai;H. Caines;M. Sánchez;J. Callner;O. Catu;D. Cebra;R. Cendejas;M. Cervantes;Z. Chajecki;P. Chaloupka;S. Chattopadhyay;H. F. Chen;J. Chen;Jin Chen;J. Cheng;M. Cherney;A. Chikanian;K. Choi;W. Christie;S. Chung;R. Clarke;M. Codrington;J. Coffin;R. Corliss;T. Cormier;M. R. Cosentino;J. Cramer;H. Crawford;D. Das;S. Dash;M. Daugherity;C. D. Silva;T. Dedovich;M. Dephillips;A. Derevschikov;R. D. Souza;L. Didenko;P. Djawotho;S. Dogra;X. Dong;J. Drachenberg;J. Draper;F. Du;J. Dunlop;M. Mazumdar;W. Edwards;L. Efimov;E. Elhalhuli;M. Elnimr;V. Emelianov;J. Engelage;G. Eppley;B. Erazmus;M. Estienne;L. Eun;P. Fachini;R. Fatémi;J. Fedorišin;A. Feng;P. Filip;E. Finch;V. Fine;Y. Fisyak;C. Gagliardi;L. Gaillard;D. Gangadharan;M. Ganti;E. Garcia-Solis;V. Ghazikhanian;P. Ghosh;Y. Gorbunov;A. Gordon;O. Grebenyuk;D. Grosnick;B. Grube;S. Guertin;K. Guimaraes;A. Gupta;N. Gupta;W. Guryn;B. Haag;T. Hallman;Ahmed M. Hamed;J. Harris;W. He;M. Heinz;S. Hepplemann;B. Hippolyte;A. Hirsch;E. Hjort;A. M. Hoffman;G. Hoffmann;D. Hofman;R. Hollis;H. Huang;T. Humanic;G. Igo;A. Iordanova;P. Jacobs;W. W. Jacobs-W.;P. Jakl;F. Jin;C. Jones;P. Jones;J. Joseph;E. Judd;S. Kabana;K. Kajimoto;K. Kang;J. Kapitán;M. Kaplan;D. Keane;A. Kechechyan;D. Kettler;V. Khodyrev;D. Kikoła;J. Kiryluk;A. Kisiel;S. Klein;A. Knospe;A. Kocoloski;D. Koetke;M. Kopytine;L. Kotchenda;V. Kouchpil;P. Kravtsov;V. Kravtsov;K. Krueger;M. Krůs;C. Kuhn;L. Kumar;P. Kurnadi;M. Lamont;J. Landgraf;S. Lapointe;J. Lauret;A. Lebedev;R. Lednický;C. Lee;W. Leight;M. Levine;C. Li;Y. Li;G. Lin;Xu Lin;S. Lindenbaum;M. Lisa;F. Liu;H. Liu;J. Liu;L. Liu;T. Ljubičić;W. Llope;R. Longacre;W. Love;Yuerui Lu;T. Ludlam;D. Lynn;G. Ma;Y. Ma;D. P. Mahapatra;R. Majka;O. Mall;L. Mangotra;R. Manweiler;S. Margetis;C. Markert;H. Matis;Y. Matulenko;T. McShane;A. Meschanin;R. Millner;N. Minaev;S. Mioduszewski;A. Mischke;J. Mitchell;B. Mohanty;B. Mohanty;D. A. Morozov;M. Munhoz;B. Nandi;C. Nattrass;T. Nayak;J. Nelson;C. Nepali;P. Netrakanti;M. Ng;L. Nogach;S. Nurushev;G. Odyniec;A. Ogawa;H. Okada;V. Okorokov;D. Olson;M. Pachr;B. Page;S. Pal;Y. Pandit;Y. Panebratsev;T. Pawlak;T. Peitzmann;V. Perevoztchikov;C. Perkins;W. Peryt;S. C. Phatak;M. Planinić;J. Pluta;N. Poljak;A. Poskanzer;B. Potukuchi;D. Prindle;C. Pruneau;N. Pruthi;J. Putschke;R. Raniwala;S. Raniwala;R. Ray;R. Redwine;R. Reed;A. Ridiger;H. Ritter;J. Roberts;O. Rogachevskiy;J. Romero;A. Rose;C. Roy;L. Ruan;M. Russcher;V. Rykov;R. Sahoo;I. Sakrejda;T. Sakuma;S. Salur;J. Sandweiss;M. Sarsour;I. Savin;J. Schambach;R. Scharenberg;N. Schmitz;J. Seger;I. Selyuzhenkov;P. Seyboth;A. Shabetai;E. Shahaliev;M. Shao;M. Sharma;S. Shi;X. Shi;E. Sichtermann;F. Simon;R. Singaraju;M. Skoby;N. Smirnov;R. Snellings;P. Sorensen;J. Sowinski;H. Spinka;B. Srivastava;A. Stadnik;T. Stanislaus;D. Staszak;M. Strikhanov;B. Stringfellow;A. Suaide;M. Suárez;N. L. Subba;M. Šumbera;Xiang Sun;Yongjie Sun;Zhi Sun;B. Surrow;T. Symons;A. D. Toledo;J. Takahashi;A. Tang;Z. Tang;T. Tarnowsky;D. Thein;J. Thomas;J. Tian;A. Timmins;S. Timoshenko;D. Tlustý;M. Tokarev;T. Trainor;V. Tram;A. L. Trattner;S. Trentalange;R. Tribble;O. Tsai;J. Ulery;T. Ullrich;D. Underwood;G. Buren;M. Leeuwen;A. M. Molen;J. Vanfossen;R. Varma;G. Vasconcelos;I. Vasilevski;A. Vasiliev;F. Videbæk;S. Vigdor;Y. Viyogi;S. Vokál;S. Voloshin;M. Wada;W. Waggoner;M. Walker;F. Wang;Gang Wang;J. Wang;Q. Wang;X. Wang;X. Wang;Yang Wang;J. Webb;G. Westfall;C. Whitten;H. Wieman;S. Wissink;R. Witt;Y. Wu;N. Xu;Q. Xu;Yang Xu;Zhongbin Xu;P. Yepes;I. Yoo;Qian Yue;M. Zawisza;H. Zbroszczyk;W. Zhan;Hui Zhang;Song Zhang;W. M. Zhang;Yang Zhang;Z. Zhang;Y. Zhao;C. Zhong;J. Zhou;R. Zoulkarneev;Y. Zoulkarneeva;J. Zuo
我们通过比较Cu+Cu碰撞的新结果和先前报道的在RHIC STAR实验中测量的sNN=62.4和200 GeV下Au+Au碰撞的结果，研究了束能量和系统尺寸对φ介子产生的依赖（使用强子衰变模式φ→K+K−）。本信中提供的数据来自0.4<pT<5 GeV/c的中速（|y|<0.5）。在给定束流能量下，观察到具有相似平均参与核子数的Cu+Cu和Au+Au碰撞系统中φ介子的横动量分布在产率和形状上相似。核-核碰撞中的φ介子产额，通过参与核子的平均数目归一化，发现相对于p+p碰撞的φ介子产额有所增强。对于φ介子的增强存在于净奇异度=1 （K−和Λ¯）和净奇异度=2 （Ξ）的奇异强子之间。在sNN=200 GeV时，与62.4 GeV相比，观察到φ介子的增强更高。这些对产生的φ （ss¯）介子的观察清楚地表明，在这些碰撞能量下，奇异强子增强的来源与高能核-核碰撞中致密部分子介质的形成有关，并且不能单独存在，因为它们的产生在较小的系统中受到规范抑制。
We study the beam-energy and system-size dependence of ϕ meson production (using the hadronic decay mode ϕ→K+K−) by comparing the new results from Cu+Cu collisions and previously reported Au+Au collisions at sNN=62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity (|y|<0.5) for 0.4<pT<5 GeV/c. At a given beam energy, the transverse momentum distributions for ϕ mesons are observed to be similar in yield and shape for Cu+Cu and Au+Au colliding systems with similar average numbers of participating nucleons. The ϕ meson yields in nucleus–nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from p+p collisions. The enhancement for ϕ mesons lies between strange hadrons having net strangeness =1 (K−and Λ¯) and net strangeness =2 (Ξ). The enhancement for ϕ mesons is observed to be higher at sNN=200 GeV compared to 62.4 GeV. These observations for the produced ϕ(ss¯) mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus–nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.