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Leszek Adamczyk, J. Kevin Adkins, Geydar Agakishiev, Madan Mohan Aggarwal, Zubayer Ahammed, Igor G. Alekseev, J. Alford, Alexey Aparin, Dmitry A. Arkhipkin, Elke Caroline Aschenauer, Georgy S. Averichev, A. Banerjee, Rene Bellwied, Anju Bhasin, Ashok Kumar Bhati, P. Bhattarai, Jaroslav Bielčík, Jana Bielčíková, Leslie C. Bland, Igor G. Bordyuzhin, J. Bouchet, Andrei V. Brandin, Ivan Bunzarov, T.P. Burton, Joseph Butterworth, Helen Louise Caines, M. Calder’on de la Barca S’anchez, J.M. Campbell, Daniel A. Cebra, M.C. Cervantes, Irakli Chakaberia, Petr Chaloupka, Z. Chang, S. Chattopadhyay, J.H. Chen, X. Chen, J. Cheng, Michael Gerard Cherney, William Christie, M.J.M. Codrington, Giacomo Contin, Henry J. Crawford, Supriya Das, L.C. De Silva, R.R. Debbe, Tatiana G. Dedovič, J. Deng, Anatoly A. Derevschikov, Benedetto di Ruzza, Lidia Didenko, Christopher Dilks, X. Dong, James Lucus Drachenberg, James E. Draper, C.M. Du, L.E. Dunkelberger, James C. Dunlop, Leonid G. Efimov, Jon M. Engelage, Geary Wareham Eppley, Roli Esha, Olga Y. Evdokimov, Kjeld Oleg Eyser, Renee H. Fatemi, Salvatore Fazio, Pavol Federič, Jan Fedorišin, Feng, Peter Filip, Yuri V. Fisyak, C.E. Flores, Łukasz Fulek, Carl A. Gagliardi, D. Garand, Frank Geurts, Adam Gibson, M. Girard, Leo Clifford Greiner, David P. Grosnick, D.S. Gunarathne, Y. Guo, S. Gupta, Anik Gupta, Włodzimierz Guryn, Ayman Hamad, Ahmed M. Hamed, R. Haque, John W. Harris, L. He, S. Heppelmann, Andrew S. Hirsch, Gerald W. Hoffmann, D.J. Hofman, S. Horvat, H.Z. Huang, X. Huang, Bingchu Huang, P. Huck, Thomas J. Humanic, George J. Igo, William W. Jacobs, H. Jang, K. Jiang, Eleanor G. Judd, Sonia Kabana, Dmitry Kalinkin, K. Kang, Kolja Kauder, Hongwei Ke, Declan Keane, Armen Kechechyan, Z.H. Khan, D.P. Kikola, Ivan Kisel, Adam Ryszard Kisiel, Spencer Robert Klein, Donald D. Koetke, Thorsten Kollegger, Leszek Krzysztof Kosarzewski, L. Kotchenda, A.F. Kraishan, Peter Kravtsov, Keith William Krueger, Igor Kulakov, Lokesh Kumar, R.A. Kycia, Matthew A. C. Lamont, Jeffery M. Landgraf, K.D. Landry, Jerome Lauret, Alexei Lebedev, Richard Lednicky, J.H. Lee, X. Li, X. Li, W. Li, Z.M. Li, Y. Li, C. Li, Michael A. Lisa, F. Liu, Tonko A. Ljubicic, William Joseph Llope, M. Lomnitz, Ronald S. Longacre, X. Luo, L. Ma, R. Ma, G.L. Ma, Yu-Gang Ma, Niseem Magdy Abdelwahab Abdelrahman, Richard Daniel Majka, A. Manion, Spyridon Margetis, Christina Markert, H. Masui, Howard S. Matis, Daniel McDonald, K. Meehan, Nikolai G. Minaev, Saskia Mioduszewski, Bedangadas Mohanty, Mriganka Mouli Mouli, Dmitry A. Morozov, M.K. Mustafa, Basanta Kumar Nandi, Md. Nasim, Tapan Kumar Nayak, Grigory A. Nigmatkulov, Larisa V. Nogach, S.Y. Noh, J. Novak, Sandibek B. Nurušev, Grazyna Janina Odyniec, Akio Ogawa, K. Oh, Vitaly A. Okorokov, D.L. Olvitt, Brian S. Page, Y.X. Pan, Y. Pandit, Yuri Panebratsev, Tomasz Jan Pawlak, Bogdan Pawlik, Hua Pei, Chris Perkins, A. Peterson, P. Pile, Mirko Planinic, Jan Marian Pluta, Nikola Poljak, K. Poniatowska, Jeffrey Brent Porter, Matthew Posik, Arthur M. Poskanzer, Navneet Kumar Pruthi, Jörn H. Putschke, H. Qiu, Amilkar Quintero, Suvarna Ramachandran, Rashmi Raniwala, Sudhir Raniwala, Robert L. Ray, Hans Georg Ritter, Jabus B. Roberts, Oleg V. Rogačevskij, Juan L. Romero, Ankhi Roy, L. Ruan, Jan Rusnak, O. Rusnakova, Nihar Ranjan Sahoo, Pradip Kumar Sahu, Iwona Sakrejda, Sevil Salur, A. Sandacz, Jack H. Sandweiss, Amal Sarkar, Joachim Schambach, Rolf Paul Scharenberg, Alexander Schmah, William B. Schmidke, Norbert Schmitz, Janet Elizabeth Seger, Peter Seyboth, N. Shah, Ehtiram Shahaliev, Prashanth V. Shanmuganathan, M. Shao, M.K. Sharma, B. Sharma, W.Q. Shen, Shusu Shi, Q.Y. Shou, Ernst P. Sichtermann, Rafał Sikora, Miroslav Šimko, Michael J. Skoby, Nikolai Smirnov, Dmitri V. Smirnov, D. Solanki, L. Song, Paul Richard Sorensen, Harold. M. Spinka, B. Srivastava, T. D. Shirvel Stanislaus, Reinhard Stock, Michail Nikolaevič Strichanov, Blair Stringfellow, Michal Šumbera, B.J. Summa, Y. Sun, Z. Sun, X.M. Sun, X. Sun, Bernd Surrow, Dmitry N. Svirida, M.A. Szelezniak, Jun Takahashi, Aihong Tang, Z. Tang, Terence J. Tarnowsky, Abdel Nasser Tawfik, James H. Thomas, Anthony Robert Timmins, David Tlusty, Mikhail V. Tokarev, Stephen Trentalange, Robert E. Tribble, Prithwish Tribedy, Srikanta Kumar Tripathy, Barbara Antonina Trzeciak, Oleg D. Tsai, Thomas Ullrich, David G. Underwood, Isaac Upsal, Gene Van Buren, G. van Nieuwenhuizen, M. Vandenbroucke, Raghava Varma, Alexander Nikolaevich Vasiliev, Róbert Vértesi, Flemming Videbæk, Yogendra P. Viyogi, Stanislav Vokal, Sergei Voloshin, A. Vossen, Y. Wang, F. Wang, H. Wang, J.S. Wang, G. Wang, Y. Wang, Jason C. Webb, Grant Webb, L. Wen, Gary D. Westfall, Howard Wieman, Scott W. Wissink, Richard Witt, Y.F. Wu, Z. Xiao, W. Xie, K. Xin, Z. Xu, Q.H. Xu, N. Xu, H. Xu, Y.F. Xu, Y. Yang, C. Yang, S. Yang, Q. Yang, Y. Yang, Z. Ye, Pablo P. Yepes, L. Yi, K. Yip, In-Kwon Yoo, N. Yu, Hanna Paulina Zbroszczyk, Wangmei Zha, J.B. Zhang, X.P. Zhang, S. Zhang, J. Zhang, Z. Zhang, Y. Zhang, J.L. Zhang, F. Zhao, J. Zhao, C. Zhong, L. Zhou, X. Zhu, Y. Zoulkarneeva, Maksym Zyzak

• The acceptance-corrected dielectron excess mass spectra, where the known hadronic sources have been subtracted from the inclusive dielectron mass spectra, are reported for the first time at mid-rapidity |yee|<1 in minimum-bias Au+Au collisions at sNN−−−−√ = 19.6 and 200 GeV. The excess mass spectra are consistently described by a model calculation with a broadened ρ spectral function for Mee<1.1 GeV/c2. The integrated dielectron excess yield at sNN−−−−√ = 19.6 GeV for 0.4<Mee<0.75 GeV/c2, normalized to the charged particle multiplicity at mid-rapidity, has a value similar to that in In+In collisions at sNN−−−−√ = 17.3 GeV. For sNN−−−−√ = 200 GeV, the normalized excess yield in central collisions is higher than that at sNN−−−−√ = 17.3 GeV and increases from peripheral to central collisions. These measurements indicate that the lifetime of the hot, dense medium created in central Au+Au collisions at sNN−−−−√ = 200 GeV is longer than those in peripheral collisions and at lower energies.