STAR 实验在 RHIC 上测量的净-$\Lambda$ 涨落的束流能量依赖
核实验
2020-08-12 v1 高能物理 - 实验
高能物理 - 唯象学
核理论
摘要
粒子多重数分布的测量在理解量子色动力学（QCD）强子化区中守恒量子数的涨落方面引起了相当大的兴趣，特别是在可能的临界点和化学冻结附近。我们报道了在奇异数守恒与重子数守恒两种情形下，净- 分布的效率与中心度 bin 宽度修正累积量比（、）作为碰撞能量、中心度和快度函数的测量。结果来自金+金（Au + Au）碰撞在五个束流能量（ = 19.6、27、39、62.4 和 200 GeV）下由 RHIC 上的螺线管径迹探测器（STAR）记录的数据。我们将结果与泊松和负二项（NBD）预期，以及超相对论量子分子动力学（UrQMD）和强子共振气体（HRG）模型预言进行比较。NBD 与泊松基线在统计与系统不确定性范围内均与数据相符。所测累积量之比未显现临界涨落特征。由近期成功描述净质子、净 kaon 与净电荷数据的 HRG 计算提取的化学冻结温度表明， 的冻结条件与 kaon 相似。然而，与由净质子涨落所得温度比较时发现较大偏差。净- 累积量在探测器接受度内的快度覆盖上表现出微弱但有限的依赖，这可归因于量子数守恒。
引用
@article{arxiv.2001.06419,
title = {Beam energy dependence of net-$\Lambda$ fluctuations measured by the STAR experiment at RHIC},
author = {STAR Collaboration and J. Adam and L. Adamczyk and J. R. Adams and J. K. Adkins and G. Agakishiev and M. M. Aggarwal and Z. Ahammed and I. Alekseev and D. M. Anderson and A. Aparin and E. C. Aschenauer and M. U. Ashraf and F. G. Atetalla and A. Attri and G. S. Averichev and V. Bairathi and K. Barish and A. Behera and R. Bellwied and A. Bhasin and J. Bielcik and J. Bielcikova and L. C. Bland and I. G. Bordyuzhin and J. D. Brandenburg and A. V. Brandin and J. Butterworth and H. Caines and M. Calderón de la Barca Sánchez and D. Cebra and I. Chakaberia and P. Chaloupka and B. K. Chan and F-H. Chang and Z. Chang and N. Chankova-Bunzarova and A. Chatterjee and D. Chen and J. H. Chen and X. Chen and Z. Chen and J. Cheng and M. Cherney and M. Chevalier and S. Choudhury and W. Christie and H. J. Crawford and M. Csanád and M. Daugherity and T. G. Dedovich and I. M. Deppner and A. A. Derevschikov and L. Didenko and X. Dong and J. L. Drachenberg and J. C. Dunlop and T. Edmonds and N. Elsey and J. Engelage and G. Eppley and R. Esha and S. Esumi and O. Evdokimov and A. Ewigleben and O. Eyser and R. Fatemi and S. Fazio and P. Federic and J. Fedorisin and C. J. Feng and Y. Feng and P. Filip and E. Finch and Y. Fisyak and A. Francisco and L. Fulek and C. A. Gagliardi and T. Galatyuk and F. Geurts and A. Gibson and K. Gopal and D. Grosnick and W. Guryn and A. I. Hamad and A. Hamed and J. W. Harris and S. He and W. He and X. He and S. Heppelmann and S. Heppelmann and N. Herrmann and E. Hoffman and L. Holub and Y. Hong and S. Horvat and Y. Hu and H. Z. Huang and S. L. Huang and T. Huang and X. Huang and T. J. Humanic and P. Huo and G. Igo and D. Isenhower and W. W. Jacobs and C. Jena and A. Jentsch and Y. JI and J. Jia and K. Jiang and S. Jowzaee and X. Ju and E. G. Judd and S. Kabana and M. L. Kabir and S. Kagamaster and D. Kalinkin and K. Kang and D. Kapukchyan and K. Kauder and H. W. Ke and D. Keane and A. Kechechyan and M. Kelsey and Y. V. Khyzhniak and D. P. Kikoła and C. Kim and B. Kimelman and D. Kincses and T. A. Kinghorn and I. Kisel and A. Kiselev and A. Kisiel and M. Kocan and L. Kochenda and L. K. Kosarzewski and L. Kramarik and P. Kravtsov and K. Krueger and N. Kulathunga Mudiyanselage and L. Kumar and R. Kunnawalkam Elayavalli and J. H. Kwasizur and R. Lacey and S. Lan and J. M. Landgraf and J. Lauret and A. Lebedev and R. Lednicky and J. H. Lee and Y. H. Leung and C. Li and W. Li and W. Li and X. Li and Y. Li and Y. Liang and R. Licenik and T. Lin and Y. Lin and M. A. Lisa and F. Liu and H. Liu and P. Liu and P. Liu and T. Liu and X. Liu and Y. Liu and Z. Liu and T. Ljubicic and W. J. Llope and R. S. Longacre and N. S. Lukow and S. Luo and X. Luo and G. L. Ma and L. Ma and R. Ma and Y. G. Ma and N. Magdy and R. Majka and D. Mallick and S. Margetis and C. Markert and H. S. Matis and J. A. Mazer and N. G. Minaev and S. Mioduszewski and B. Mohanty and I. Mooney and Z. Moravcova and D. A. Morozov and M. Nagy and J. D. Nam and Md. Nasim and K. Nayak and D. Neff 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 G. Odyniec and A. Ogawa and S. Oh and V. A. Okorokov and B. S. Page and R. Pak and A. Pandav and Y. Panebratsev and B. Pawlik and D. Pawlowska and H. Pei and C. Perkins and L. Pinsky and R. L. Pintér and J. Pluta and J. Porter and M. Posik and N. K. Pruthi and M. Przybycien and J. Putschke and H. Qiu and A. Quintero and S. K. Radhakrishnan and S. Ramachandran and R. L. Ray 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 H. Sako and S. Salur and J. Sandweiss and S. Sato and W. B. Schmidke and N. Schmitz and B. R. Schweid and F. Seck 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 F. Shen and W. Q. Shen and S. S. Shi and Q. Y. Shou and E. P. Sichtermann and R. Sikora and M. Simko and J. Singh and S. Singha and N. Smirnov and W. Solyst and P. Sorensen and H. M. Spinka and B. Srivastava and T. D. S. Stanislaus and M. Stefaniak and D. J. Stewart and M. Strikhanov and B. Stringfellow and A. A. P. Suaide and M. Sumbera and B. Summa and X. M. Sun and Y. Sun and Y. Sun and B. Surrow and D. N. Svirida and P. Szymanski and A. H. Tang and Z. Tang and A. Taranenko and T. Tarnowsky and J. H. Thomas and A. R. Timmins and D. Tlusty and M. Tokarev and C. A. Tomkiel and S. Trentalange and R. E. Tribble and P. Tribedy and S. K. Tripathy and O. D. Tsai and Z. Tu and T. Ullrich and D. G. Underwood and I. Upsal and G. Van Buren and J. Vanek and A. N. Vasiliev and I. Vassiliev and F. Videbæk and S. Vokal and S. A. Voloshin and F. Wang and G. Wang and J. S. Wang and P. Wang and Y. Wang and Y. Wang and Z. Wang and J. C. Webb and P. C. Weidenkaff 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 H. Xu and N. Xu and Q. H. Xu and Y. F. Xu and Y. Xu and Z. Xu and Z. Xu and C. Yang and Q. Yang and S. Yang and Y. Yang and Z. Yang and Z. Ye and Z. Ye and L. Yi and K. Yip and H. Zbroszczyk and W. Zha and D. Zhang and S. Zhang and S. Zhang and X. P. Zhang and Y. Zhang and Y. Zhang and Z. J. Zhang and Z. Zhang and J. Zhao and C. Zhong and C. Zhou and X. Zhu and Z. Zhu and M. Zurek and M. Zyzak},
journal= {arXiv preprint arXiv:2001.06419},
year = {2020}
}
备注
12 pages, 9 figures, 3 tables, submitted to Phys.Rev.C