Open Access

Bassam Aboona, Jaroslav Adam, Leszek Adamczyk, Joseph R. Adams, Ishu Aggarwal, Madan Mohan Aggarwal, Zubayer Ahammed, Derek M. Anderson, Elke Caroline Aschenauer, J. Atchison, Vipul Bairathi, W. Baker, Jonathan Gonzalo Ball Cap, Kenneth Barish, Rene Bellwied, Pratibha Bhagat, Anju Bhasin, Somadutta Bhatta, Jaroslav Bielčík, Jana Bielčíková, James D. Brandenburg, Xiang-Zhou Cai, Helen Louise Caines, Manuel Calderón de la Barca Sánchez, Daniel A. Cebra, Jakub Češka, Irakli Chakaberia, Petr Chaloupka, B. K. Chan, Z. Chang, D. Chen, J. Chen, J. H. Chen, Z. Chen, J. Cheng, Y. Cheng, Subikash Choudhury, William Christie, Xiaoxuan Chu, Henry J. Crawford, Máté Csanád, Gabriel Dale-Gau, A. Das, M. Daugherity, Ingo Martin Deppner, A. Dhamija, L. Di Carlo, Lidia Didenko, Prabhupada Dixit, X. Dong, James Lucus Drachenberg, Emilie Duckworth, James C. Dunlop, Jon M. Engelage, Geary Wareham Eppley, ShinIchi Esumi, Olga Y. Evdokimov, A. Ewigleben, Kjeld Oleg Eyser, Renee H. Fatemi, Salvatore Fazio, C. J. Feng, Yicheng Feng, Evan Finch, Yuri V. Fisyak, Fernando Antonio Flor, C. Fu, Carl A. Gagliardi, Tetyana Galatyuk, Frank Geurts, Navagyan Ghimire, Adam Gibson, Krishan Gopal, X. Gou, David P. Grosnick, Anik Gupta, Włodzimierz Guryn, Ahmed M. Hamed, Y. Han, Szymon Harabasz, Matthew D. Harasty, John W. Harris, Hannah Harrison, W. He, Xionghong He, Y. He, S. Heppelmann, Norbert Herrmann, Lukáš Holub, C. Hu, Q. Hu, Y. Hu, H. Huang, Huan Zhong Huang, Shengli Huang, T. Huang, X. Huang, Y. Huang, Y. Huang, Thomas J. Humanic, D. Isenhower, M. Isshiki, William W. Jacobs, Ashish Jalotra, Chitrasen Jena, Alexander Jentsch, Yuanjing Ji, Jiangyong Jia, C. Jin, Xin-Yue Ju, Eleanor G. Judd, Sonia Kabana, M. L. Kabir, Skipper Kagamaster, Dmitry Kalinkin, K. Kang, David Kapukchyan, Kolja Kauder, Hongwei Ke, Declan Keane, Matthew Kelsey, Yevheniia V. Khyzhniak, Daniel P. Kikoła, B. Kimelman, D. Kincses, Ivan Kisel, A. Kiselev, Anders Garritt Knospe, H. S. Ko, Leszek Krzysztof Kosarzewski, L. Kramarik, Lokesh Kumar, Shyam Kumar, Raghav Kunnawalkam Elayavalli, Roy Alphanso Lacey, Jeffery M. Landgraf, Jerome Lauret, Alexei Lebedev, J. H. Lee, Yue Hang Leung, N. Lewis, C. Li, C. Li, W. Li, X. Li, Y. Li, Y. Li, Z. Li, X. Liang, Y. Liang, Robert Licenik, T. Lin, Michael A. Lisa, C. Liu, F. Liu, H. Liu, H. Liu, L. Liu, Tong Liu, X. Liu, Y. Liu, Z. Liu, Tonko A. Ljubicic, William Joseph Llope, O. Lomicky, Ronald S. Longacre, E. Loyd, T. Lu, N. S. Lukow, X. F. Luo, L. Ma, Rongrong Ma, Yu-Gang Ma, Niseem Magdy Abdelwahab Abdelrahman, Dukhishyam Mallick, Spyridon Margetis, Christina Markert, Howard S. Matis, Joel Anthony Mazer, Grant McNamara, K. Mi, Saskia Mioduszewski, Bedangadas Mohanty, Isaac A. Mooney, A. Mukherjee, M. I. Nagy, A. S. Nain, J. D. Nam, Md. Nasim, D. Neff, John M. Nelson, Daniel B. Nemes, M. Nie, Takafumi Niida, R. Nishitani, Toshihiro Nonaka, A. S. Nunes, Grazyna Janina Odyniec, Akio Ogawa, Saehanseul Oh, K. Okubo, Brian S. Page, Robert Pak, Jinjin Pan, Ashish Pandav, Ashutosh Kumar Pandey, Tanmay Pani, A. Paul, Bogdan Pawlik, Diana Pawłowska, Chris Perkins, Jan Marian Pluta, B. R. Pokhrel, Matthew Posik, Tristan Protzman, V. Prozorova, Navneet Kumar Pruthi, Mariusz Przybycien, Jörn H. Putschke, Z. Qin, H. Qiu, Amilkar Quintero, Cameron Racz, Sooraj Krishnan Radhakrishnan, N. Raha, Robert L. Ray, Rosi Jan Reed, Hans Georg Ritter, C. W. Robertson, Monika Robotkova, Juan L. Romero, M. A. Rosales Aguilar, D. Roy, P. Roy Chowdhury, L. Ruan, Aswini Kumar Sahoo, Nihar Ranjan Sahoo, H. Sako, Sevil Salur, Susumu Sato, William B. Schmidke, Norbert Schmitz, F-J. Seck, Janet Elizabeth Seger, Richard Seto, Peter Seyboth, N. Shah, Prashanth V. Shanmuganathan, M. Shao, Tianhao Shao, Monika Sharma, Natasha Sharma, R. Sharma, S. R. Sharma, Ashik Ikbal Sheikh, D. Y. Shen, K. Shen, Shusu Shi, Y. Shi, Q. Y. Shou, F. Si, J. Singh, Subhash Singha, P. Sinha, Michael J. Skoby, Nikolai Smirnov, Yannick Söhngen, Y. Song, B. Srivastava, T. D. Shirvel Stanislaus, Maria Stefaniak, David J. Stewart, Blair Stringfellow, Y. Su, Alexandre Alarcon do Passo Suaide, Michal Šumbera, C. Sun, X. Sun, Y. Sun, Y. Sun, Bernd Surrow, Zachary W. Sweger, Paweł Szymański, A. Tamis, Aihong Tang, Zebo Tang, Terence J. Tarnowsky, James H. Thomas, Anthony Robert Timmins, David Tlusty, Takahito Todoroki, C. A. Tomkiel, Stephen Trentalange, Robert E. Tribble, Prithwish Tribedy, Tomas Truhlar, Barbara Antonina Trzeciak, Oleg D. Tsai, C. Y. Tsang, Zhoudunming Tu, Thomas Ullrich, David G. Underwood, Isaac Upsal, Gene Van Buren, Jan Vanek, Iouri Vassiliev, Veronica Verkest, Flemming Videbæk, Sergei Voloshin, F. Wang, G. Wang, J. S. Wang, X. Wang, Y. Wang, Y. Wang, Y. Wang, Z. Wang, Jason C. Webb, Philipp Weidenkaff, Gary D. Westfall, Daniel Wielanek, Howard Wieman, G. Wilks, Scott W. Wissink, Richard Witt, J. Wu, J. Wu, Xiao Wu, Y. Wu, B. Xi, Z. G. Xiao, W. Xie, H. Xu, N. Xu, Qinghua Xu, Y. Xu, Y. Xu, Z. Xu, Z. Xu, G. Yan, Z. Yan, C. Yang, Q. Yang, S. Yang, Y. Yang, Z. Ye, Z. Ye, L. Yi, K. Yip, Y. Yu, Hanna Paulina Zbroszczyk, Wangmei Zha, C. Zhang, Dingwei Zhang, J. Zhang, S. Zhang, X. Zhang, Y. Zhang, Y. Zhang, Y. Zhang, Z. J. Zhang, Z. Zhang, Z. Zhang, F. Zhao, J. Zhao, M. Zhao, C. Zhou, J. Zhou, S. Zhou, Y. Zhou, X. Zhu, Maria Katarzyna Żurek, Maksym Zyzak

• We report on measurements of sequential Υ suppression in Au+Au collisions at sNN−−−√ = 200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC) through both the dielectron and dimuon decay channels. In the 0-60% centrality class, the nuclear modification factors (RAA), which quantify the level of yield suppression in heavy-ion collisions compared to p+p collisions, for Υ(1S) and Υ(2S) are 0.40±0.03 (stat.)±0.03 (sys.)±0.09 (norm.) and 0.26±0.08 (stat.)±0.02 (sys.)±0.06 (norm.), respectively, while the upper limit of the Υ(3S) RAA is 0.17 at a 95% confidence level. This provides experimental evidence that the Υ(3S) is significantly more suppressed than the Υ(1S) at RHIC. The level of suppression for Υ(1S) is comparable to that observed at the much higher collision energy at the Large Hadron Collider. These results point to the creation of a medium at RHIC whose temperature is sufficiently high to strongly suppress excited Υ states.