$\sqrt{s_{\rm NN}}$ = 62 和 200 GeV Au-Au 碰撞中双粒子角关联的反常中心度演化
核实验
2015-05-30 v2
摘要
我们展示了 和 200 GeV Au-Au 碰撞中带电粒子的二维 (2D) 双粒子角关联（关于相对赝快度 和方位角 ），其横动量 GeV/， 且方位角覆盖 。观测到的关联包括一个同侧（相对方位角 ）2D 峰、一个密切相关的对侧方位偶极子，以及一个通常与椭圆流相关联的方位四极子。在质子-质子和边缘核-核碰撞中，同侧 2D 峰和对侧偶极子可通过半硬部分子散射与碎裂（微喷流）来解释。在 Au-Au 碰撞中，这些结构遵循 N-N 二元碰撞标度，直到中等中心度时，在一个很小的中心度区间内发生向定性不同的中心度趋势的转变。在转变点之上，同侧和对侧关联对的数量相对于二元碰撞标度迅速增加，同侧 2D 峰的 宽度也迅速增加（ 拉长），而 宽度实际上显著减小。与稠密介质中喷流淬灭的预期相比，这些中心度趋势更为显著。我们将观测到的中心度趋势与 {\sc hijing} 预测以及热化不透明介质中半硬部分子散射与碎裂的预期趋势进行了比较。我们无法将观测到的关联结构和中心度趋势的半硬部分子散射与碎裂起源，与涉及部分子快速热化的重离子碰撞情景相协调。另一方面，如果碰撞系统对几 GeV 的部分子实际上是不透明的，则本文报告的观测结果将与微喷流图像不一致。
引用
@article{arxiv.1109.4380,
title = {Anomalous centrality evolution of two-particle angular correlations from Au-Au collisions at $\sqrt{s_{\rm NN}}$ = 62 and 200 GeV},
author = {STAR Collaboration and G. Agakishiev and M. M. Aggarwal and Z. Ahammed and A. V. Alakhverdyants and I. Alekseev and J. Alford and B. D. Anderson and C. D. Anson and D. Arkhipkin and G. S. Averichev and J. Balewski and D. R. Beavis and R. Bellwied and M. J. Betancourt and R. R. Betts and A. Bhasin and A. K. Bhati and H. Bichsel and J. Bielcik and J. Bielcikova and L. C. Bland and I. G. Bordyuzhin and W. Borowski and J. Bouchet and E. Braidot and A. V. Brandin and S. G. Brovko and E. Bruna and S. Bueltmann and I. Bunzarov and T. P. Burton and X. Z. Cai and H. Caines and M. Calderon and D. Cebra and R. Cendejas and M. C. Cervantes and P. Chaloupka and S. Chattopadhyay and H. F. Chen and J. H. Chen and J. Y. Chen and L. Chen and J. Cheng and M. Cherney and A. Chikanian and W. Christie and P. Chung and M. J. M. Codrington and R. Corliss and J. G. Cramer and H. J. Crawford and X. Cui and A. Davila Leyva and L. C. De Silva and R. R. Debbe and T. G. Dedovich and J. Deng and A. A. Derevschikov and R. Derradi de Souza and L. Didenko and P. Djawotho and X. Dong and J. L. Drachenberg and J. E. Draper and C. M. Du and J. C. Dunlop and L. G. Efimov and M. Elnimr and J. Engelage and G. Eppley and M. Estienne and L. Eun and O. Evdokimov and R. Fatemi and J. Fedorisin and R. G. Fersch and P. Filip and E. Finch and V. Fine and Y. Fisyak and C. A. Gagliardi and D. R. Gangadharan and F. Geurts and P. Ghosh and Y. N. Gorbunov and A. Gordon and O. G. Grebenyuk and D. Grosnick and A. Gupta and S. Gupta and W. Guryn and B. Haag and O. Hajkova and A. Hamed and L-X. Han and J. W. Harris and J. P. Hays-Wehle and S. Heppelmann and A. Hirsch and G. W. Hoffmann and D. J. Hofman and B. Huang and H. Z. Huang and T. J. Humanic and L. Huo and G. Igo and W. W. Jacobs and C. Jena and J. Joseph and E. G. Judd and S. Kabana and K. Kang and J. Kapitan and K. Kauder and H. W. Ke and D. Keane and A. Kechechyan and D. Kettler and D. P. Kikola and J. Kiryluk and A. Kisiel and V. Kizka and S. R. Klein and D. D. Koetke and T. Kollegger and J. Konzer and I. Koralt and L. Koroleva and W. Korsch and L. Kotchenda and P. Kravtsov and K. Krueger and L. Kumar and M. A. C. Lamont and J. M. Landgraf and S. LaPointe and J. Lauret and A. Lebedev and R. Lednicky and J. H. Lee and W. Leight and M. J. LeVine and C. Li and L. Li and W. Li and X. Li and X. Li and Y. Li and Z. M. Li and L. M. Lima and M. A. Lisa and F. Liu and T. Ljubicic and W. J. Llope and R. S. Longacre and Y. Lu and E. V. Lukashov and X. Luo and G. L. Ma and Y. G. Ma and D. P. Mahapatra and R. Majka and O. I. Mall and R. Manweiler and S. Margetis and C. Markert and H. Masui and H. S. Matis and D. McDonald and T. S. McShane and A. Meschanin and R. Milner and N. G. Minaev and S. Mioduszewski and M. K. Mitrovski and Y. Mohammed and B. Mohanty and M. M. Mondal and B. Morozov and D. A. Morozov and M. G. Munhoz and M. K. Mustafa and M. Naglis and B. K. Nandi and Md. Nasim and T. K. Nayak and L. V. Nogach and S. B. Nurushev and G. Odyniec and A. Ogawa and K. Oh and A. Ohlson and V. Okorokov and E. W. Oldag and R. A. N. Oliveira and D. Olson and M. Pachr and B. S. Page and S. K. Pal and Y. Pandit and Y. Panebratsev and T. Pawlak and H. Pei and T. Peitzmann and C. Perkins and W. Peryt and P. Pile and M. Planinic and J. Pluta and D. Plyku and N. Poljak and J. Porter and C. B. Powell and D. Prindle and C. Pruneau and N. K. Pruthi and P. R. Pujahari and J. Putschke and H. Qiu and R. Raniwala and S. Raniwala and R. L. Ray and R. Redwine and R. Reed and H. G. Ritter and J. B. Roberts and O. V. Rogachevskiy and J. L. Romero and L. Ruan and J. Rusnak and N. R. Sahoo and I. Sakrejda and S. Salur and J. Sandweiss and E. Sangaline and A. Sarkar and J. Schambach and R. P. Scharenberg and J. Schaub and A. M. Schmah and N. Schmitz and T. R. Schuster and J. Seele and J. Seger and I. Selyuzhenkov and P. Seyboth and N. Shah and E. Shahaliev and M. Shao and M. Sharma and S. S. Shi and Q. Y. Shou and E. P. Sichtermann and F. Simon and R. N. Singaraju and M. J. Skoby and N. Smirnov and D. Solanki and P. Sorensen and U. G. de Souza and H. M. Spinka and B. Srivastava and T. D. S. Stanislaus and S. G. Steadman and J. R. Stevens and R. Stock and M. Strikhanov and B. Stringfellow and A. A. P. Suaide and M. C. Suarez and M. Sumbera and X. M. Sun and Y. Sun and Z. Sun and B. Surrow and D. N. Svirida and T. J. M. Symons and A. Szanto de Toledo and J. Takahashi and A. H. Tang and Z. Tang and L. H. Tarini and T. Tarnowsky and D. Thein and J. H. Thomas and J. Tian and A. R. Timmins and D. Tlusty and M. Tokarev and T. A. Trainor and S. Trentalange and R. E. Tribble and P. Tribedy and B. A. Trzeciak and O. D. Tsai and T. Ullrich and D. G. Underwood and G. Van Buren and G. van Nieuwenhuizen and J. A. Vanfossen, and R. Varma and G. M. S. Vasconcelos and A. N. Vasiliev and F. Videbaek and Y. P. Viyogi and S. Vokal and M. Wada and M. Walker and F. Wang and G. Wang and H. Wang and J. S. Wang and Q. Wang and X. L. Wang and Y. Wang and G. Webb and J. C. Webb and G. D. Westfall and C. Whitten and H. Wieman and S. W. Wissink and R. Witt and W. Witzke and Y. F. Wu and Z. Xiao and W. Xie and H. Xu and N. Xu and Q. H. Xu and W. Xu and Y. Xu and Z. Xu and L. Xue and Y. Yang and Y. Yang and P. Yepes and K. Yip and I-K. Yoo and M. Zawisza and H. Zbroszczyk and W. Zhan and J. B. Zhang and S. Zhang and W. M. Zhang and X. P. Zhang and Y. Zhang and Z. P. Zhang and F. Zhao and J. Zhao and C. Zhong and X. Zhu and Y. H. Zhu and Y. Zoulkarneeva},
journal= {arXiv preprint arXiv:1109.4380},
year = {2015}
}
备注
26 pages, 8 figures, 2 tables