Cu+Au 碰撞在 $\sqrt{s_{_{NN}}}$ = 200 GeV 下的方位角各向异性
核实验
2018-08-09 v2
摘要
在 Cu+Au 碰撞中，已在 = 200 GeV、谐波 1-4、赝快度范围 内系统研究了已鉴别与未鉴别带电粒子的方位角各向异性流。将 Cu+Au 碰撞中的定向流与 Au+Au 碰撞在 = 200~GeV 下带电粒子定向流的快度奇分量以及首次观测到的快度偶分量进行了比较。发现 Cu+Au 碰撞中定向流的赝快度依赖斜率与 Au+Au 碰撞中相似，其截距向正 值（即 Cu 行进方向）偏移。投影到旁观者平面的平均横动量 在 Cu+Au 碰撞中也表现出对 近似线性的依赖，截距约在 ，更接近 Cu+Au 系统质心的快度。所观测到的依赖关系在定向流部分源于“倾斜源”、部分源于初始密度分布中快度依赖的不对称性的图像中得到了自然解释。在 Cu+Au 碰撞中还观测到 的电荷依赖性，表明由两个碰撞核中旁观者质子的电荷差所产生的初始电场的影响。Au+Au 碰撞中定向流的快度偶分量接近于 = 2.76 TeV 下 Pb+Pb 碰撞中的结果，表明初始态密度分布中偶极型涨落的幅度相似。Cu+Au 碰撞中的高次谐波流表现出与 Au+Au 和 Pb+Pb 碰撞中相似的趋势，并被粘性流体力学模型和多相输运模型定性重现。对于所有 的谐波，我们观测到 随组成夸克数近似标度。
引用
@article{arxiv.1712.01332,
title = {Azimuthal anisotropy in Cu+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV},
author = {STAR Collaboration and L. Adamczyk and J. R. Adams and J. K. Adkins and G. Agakishiev and M. M. Aggarwal and Z. Ahammed and N. N. Ajitanand and I. Alekseev and D. M. Anderson and R. Aoyama and A. Aparin and D. Arkhipkin and E. C. Aschenauer and M. U. Ashraf and A. Attri and G. S. Averichev and X. Bai and V. Bairathi and K. Barish and A. Behera and R. Bellwied and A. Bhasin and A. K. Bhati and P. Bhattarai and J. Bielcik and J. Bielcikova and L. C. Bland and I. G. Bordyuzhin and J. Bouchet and J. D. Brandenburg and A. V. Brandin and D. Brown and J. Bryslawskyj and I. Bunzarov and J. Butterworth and H. Caines and M. Calderón de la Barca Sánchez and J. M. Campbell and D. Cebra and I. Chakaberia and P. Chaloupka and Z. Chang and N. Chankova-Bunzarova and A. Chatterjee and S. Chattopadhyay and X. Chen and J. H. Chen and X. Chen and J. Cheng and M. Cherney and W. Christie and G. Contin and H. J. Crawford and S. Das and T. G. Dedovich and J. Deng and I. M. Deppner and A. A. Derevschikov and L. Didenko and C. Dilks and X. Dong and J. L. Drachenberg and J. E. Draper and J. C. Dunlop and L. G. Efimov and N. Elsey and J. Engelage and G. Eppley and R. Esha and S. Esumi and O. Evdokimov and J. Ewigleben and O. Eyser and R. Fatemi and S. Fazio and P. Federic and P. Federicova and J. Fedorisin and Z. Feng and P. Filip and E. Finch and Y. Fisyak and C. E. Flores and J. Fujita and L. Fulek and C. A. Gagliardi and F. Geurts and A. Gibson and M. Girard and D. Grosnick and D. S. Gunarathne and Y. Guo and A. Gupta and W. Guryn and A. I. Hamad and A. Hamed and A. Harlenderova and J. W. Harris and L. He and S. Heppelmann and S. Heppelmann and N. Herrmann and A. Hirsch and S. Horvat and X. Huang and H. Z. Huang and T. Huang and B. Huang and T. J. Humanic and P. Huo and G. Igo and W. W. Jacobs and A. Jentsch and J. Jia and K. Jiang and S. Jowzaee and E. G. Judd and S. Kabana and D. Kalinkin and K. Kang and D. Kapukchyan and K. Kauder and H. W. Ke and D. Keane and A. Kechechyan and Z. Khan and D. P. Kikoła and C. Kim and I. Kisel and A. Kisiel and L. Kochenda and M. Kocmanek and T. Kollegger and L. K. Kosarzewski and A. F. Kraishan and L. Krauth and P. Kravtsov and K. Krueger and N. Kulathunga and L. Kumar and J. Kvapil and J. H. Kwasizur and R. Lacey and J. M. Landgraf and K. D. Landry and J. Lauret and A. Lebedev and R. Lednicky and J. H. Lee and W. Li and C. Li and X. Li and Y. Li and J. Lidrych and T. Lin and M. A. Lisa and F. Liu and P. Liu and Y. Liu and H. Liu and T. Ljubicic and W. J. Llope and M. Lomnitz and R. S. Longacre and S. Luo and X. Luo and G. L. Ma and R. Ma and Y. G. Ma and L. Ma and N. Magdy and R. Majka and D. Mallick and S. Margetis and C. Markert and H. S. Matis and D. Mayes and K. Meehan and J. C. Mei and Z. W. Miller and N. G. Minaev and S. Mioduszewski and D. Mishra and S. Mizuno and B. Mohanty and M. M. Mondal and D. A. Morozov and M. K. Mustafa and Md. Nasim and T. K. Nayak and J. M. Nelson and D. B. Nemes and M. Nie and G. Nigmatkulov and T. Niida and L. V. Nogach and T. Nonaka and S. B. Nurushev and G. Odyniec and A. Ogawa and K. Oh and V. A. Okorokov and D. Olvitt and B. S. Page and R. Pak and Y. Pandit and Y. Panebratsev and B. Pawlik and H. Pei and C. Perkins and J. Pluta and K. Poniatowska and J. Porter and M. Posik and A. M. Poskanzer and N. K. Pruthi and M. Przybycien and J. Putschke and A. Quintero and S. Ramachandran and R. L. Ray and R. Reed and M. J. Rehbein and H. G. Ritter and J. B. Roberts and O. V. Rogachevskiy and J. L. Romero and J. D. Roth and L. Ruan and J. Rusnak and O. Rusnakova and N. R. Sahoo and P. K. Sahu and S. Salur and J. Sandweiss and M. Saur and J. Schambach and A. M. Schmah and W. B. Schmidke and N. Schmitz and B. R. Schweid and J. Seger and M. Sergeeva and R. Seto and P. Seyboth and N. Shah and E. Shahaliev and P. V. Shanmuganathan and M. Shao and W. Q. Shen and S. S. Shi and Z. Shi and Q. Y. Shou and E. P. Sichtermann and R. Sikora and M. Simko and S. Singha and M. J. Skoby and N. Smirnov and D. Smirnov and W. Solyst and P. Sorensen and H. M. Spinka and B. Srivastava and T. D. S. Stanislaus and D. J. Stewart and M. Strikhanov and B. Stringfellow and A. A. P. Suaide and T. Sugiura and M. Sumbera and B. Summa and X. Sun and Y. Sun and X. M. Sun and B. Surrow and D. N. Svirida and Z. Tang and A. H. Tang and A. Taranenko and T. Tarnowsky and A. Tawfik and J. Thäder and J. H. Thomas and A. R. Timmins and D. Tlusty and T. Todoroki and M. Tokarev and S. Trentalange and R. E. Tribble and P. Tribedy and S. K. Tripathy and B. A. Trzeciak and O. D. Tsai and B. Tu and T. Ullrich and D. G. Underwood and I. Upsal and G. Van Buren and G. van Nieuwenhuizen and A. N. Vasiliev and F. Videbæk and S. Vokal and S. A. Voloshin and A. Vossen and G. Wang and F. Wang and Y. Wang and Y. Wang and G. Webb and J. C. Webb and L. Wen and G. D. Westfall and H. Wieman and S. W. Wissink and R. Witt and Y. Wu and Z. G. Xiao and G. Xie and W. Xie and Q. H. Xu and Y. F. Xu and J. Xu and N. Xu and Z. Xu and C. Yang and S. Yang and Q. Yang and Y. Yang and Z. Ye and Z. Ye and L. Yi and K. Yip and I. -K. Yoo and N. Yu and H. Zbroszczyk and W. Zha and J. B. Zhang and J. Zhang and S. Zhang and L. Zhang and J. Zhang and X. P. Zhang and Z. Zhang and S. Zhang and Y. Zhang and J. Zhao and C. Zhong and C. Zhou and L. Zhou and X. Zhu and Z. Zhu and M. Zyzak},
journal= {arXiv preprint arXiv:1712.01332},
year = {2018}
}
备注
20 pages, 19 figures, Accepted for publication in Phys. Rev. C