Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au+Au collisions at √sNN=19.6 and 200 GeV

Leszek Adamczyk, J. Kevin Adkins, Geydar Agakishiev, Madan Mohan Aggarwal, Zubayer Ahammed, Igor G. Alekseev, Jeremy 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, Huan Zhong 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, Zebo 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, Qinghua 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, Youlia 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.

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Author:Leszek AdamczykORCiDGND, J. Kevin Adkins, Geydar AgakishievGND, Madan Mohan AggarwalGND, Zubayer AhammedORCiD, Igor G. AlekseevORCiD, Jeremy Alford, Alexey AparinORCiD, Dmitry A. ArkhipkinORCiDGND, Elke Caroline AschenauerORCiD, Georgy S. AverichevGND, A. Banerjee, Rene BellwiedORCiDGND, Anju BhasinORCiD, Ashok Kumar Bhati, P. Bhattarai, Jaroslav BielčíkORCiDGND, Jana BielčíkováORCiDGND, Leslie C. BlandORCiD, Igor G. Bordyuzhin, J. Bouchet, Andrei V. Brandin, Ivan Bunzarov, T.P. Burton, Joseph Butterworth, Helen Louise CainesORCiD, M. Calder’on de la Barca S’anchez, J.M. Campbell, Daniel A. CebraORCiD, M.C. Cervantes, Irakli ChakaberiaORCiD, Petr ChaloupkaORCiD, Z. Chang, S. Chattopadhyay, J.H. Chen, X. Chen, J. Cheng, Michael Gerard Cherney, William ChristieORCiD, M.J.M. Codrington, Giacomo ContinORCiD, Henry J. CrawfordORCiD, Supriya DasORCiDGND, L.C. De Silva, R.R. Debbe, Tatiana G. DedovičGND, J. Deng, Anatoly A. Derevschikov, Benedetto di RuzzaORCiD, Lidia Didenko, Christopher DilksORCiD, X. Dong, James Lucus DrachenbergORCiD, James E. Draper, C.M. Du, L.E. Dunkelberger, James C. DunlopORCiD, Leonid G. Efimov, Jon M. Engelage, Geary Wareham Eppley, Roli EshaORCiD, Olga Y. EvdokimovORCiD, Kjeld Oleg EyserORCiD, Renee H. FatemiORCiD, Salvatore FazioORCiD, Pavol FederičORCiD, Jan FedorišinGND, Feng, Peter FilipORCiD, Yuri V. FisyakORCiD, C.E. Flores, Łukasz FulekORCiD, Carl A. Gagliardi, D. Garand, Frank GeurtsORCiD, Adam GibsonORCiD, M. Girard, Leo Clifford GreinerORCiD, David P. Grosnick, D.S. Gunarathne, Y. Guo, S. Gupta, Anik GuptaORCiD, Włodzimierz GurynORCiD, Ayman HamadORCiD, Ahmed M. HamedORCiD, R. Haque, John W. HarrisORCiDGND, L. He, S. Heppelmann, Andrew S. HirschORCiDGND, Gerald W. Hoffmann, D.J. Hofman, S. Horvat, Huan Zhong HuangORCiD, X. Huang, Bingchu HuangORCiD, P. Huck, Thomas J. HumanicORCiD, George J. Igo, William W. JacobsORCiD, H. Jang, K. Jiang, Eleanor G. JuddORCiD, Sonia KabanaORCiD, Dmitry KalinkinORCiD, K. Kang, Kolja KauderORCiD, Hongwei KeORCiD, Declan KeaneORCiD, Armen Kechechyan, Z.H. Khan, D.P. Kikola, Ivan KiselORCiDGND, Adam Ryszard KisielORCiD, Spencer Robert KleinORCiD, Donald D. Koetke, Thorsten KolleggerORCiDGND, Leszek Krzysztof KosarzewskiORCiD, L. Kotchenda, A.F. Kraishan, Peter KravtsovORCiD, Keith William Krueger, Igor Kulakov, Lokesh KumarORCiD, R.A. Kycia, Matthew A. C. Lamont, Jeffery M. Landgraf, K.D. Landry, Jerome LauretORCiD, Alexei Lebedev, Richard LednickyORCiD, J.H. Lee, X. Li, X. Li, W. Li, Z.M. Li, Y. Li, C. Li, Michael A. LisaORCiDGND, F. Liu, Tonko A. Ljubicic, William Joseph LlopeORCiD, M. Lomnitz, Ronald S. Longacre, X. Luo, L. Ma, R. Ma, G.L. Ma, Yu-Gang MaORCiD, Niseem Magdy Abdelwahab AbdelrahmanORCiD, Richard Daniel MajkaORCiD, A. Manion, Spyridon MargetisORCiD, Christina MarkertORCiDGND, H. Masui, Howard S. MatisORCiD, Daniel McDonald, K. Meehan, Nikolai G. Minaev, Saskia MioduszewskiORCiD, Bedangadas MohantyORCiD, Mriganka Mouli MouliORCiD, Dmitry A. Morozov, M.K. Mustafa, Basanta Kumar NandiORCiD, Md. Nasim, Tapan Kumar NayakORCiD, Grigory A. NigmatkulovORCiD, Larisa V. Nogach, S.Y. Noh, J. Novak, Sandibek B. NuruševGND, Grazyna Janina Odyniec, Akio Ogawa, K. Oh, Vitaly A. OkorokovORCiD, D.L. Olvitt, Brian S. PageORCiD, Y.X. Pan, Y. Pandit, Yuri Panebratsev, Tomasz Jan Pawlak, Bogdan PawlikORCiD, Hua PeiORCiD, Chris Perkins, A. Peterson, P. Pile, Mirko PlaninicORCiD, Jan Marian Pluta, Nikola PoljakORCiD, K. Poniatowska, Jeffrey Brent Porter, Matthew PosikORCiD, Arthur M. PoskanzerORCiDGND, Navneet Kumar PruthiORCiD, Jörn H. PutschkeORCiDGND, H. Qiu, Amilkar QuinteroORCiD, Suvarna RamachandranORCiD, Rashmi RaniwalaORCiD, Sudhir RaniwalaORCiD, Robert L. RayORCiD, Hans Georg Ritter, Jabus B. Roberts, Oleg V. RogačevskijGND, Juan L. Romero, Ankhi Roy, L. Ruan, Jan RusnakORCiD, O. Rusnakova, Nihar Ranjan SahooORCiD, Pradip Kumar SahuORCiD, Iwona Sakrejda, Sevil SalurORCiDGND, A. Sandacz, Jack H. Sandweiss, Amal SarkarORCiD, Joachim SchambachORCiD, Rolf Paul Scharenberg, Alexander SchmahORCiDGND, William B. Schmidke, Norbert SchmitzGND, Janet Elizabeth SegerORCiD, Peter SeybothORCiDGND, N. Shah, Ehtiram Shahaliev, Prashanth V. ShanmuganathanORCiD, M. Shao, M.K. Sharma, B. Sharma, W.Q. Shen, Shusu ShiORCiD, Q.Y. Shou, Ernst P. SichtermannORCiD, Rafał SikoraORCiD, Miroslav ŠimkoORCiD, Michael J. Skoby, Nikolai SmirnovORCiD, Dmitri V. SmirnovORCiD, D. Solanki, L. Song, Paul Richard SorensenORCiD, Harold. M. SpinkaORCiD, B. Srivastava, T. D. Shirvel Stanislaus, Reinhard StockGND, Michail Nikolaevič StrichanovORCiDGND, Blair Stringfellow, Michal ŠumberaORCiD, B.J. Summa, Y. Sun, Z. Sun, X.M. Sun, X. Sun, Bernd SurrowORCiDGND, Dmitry N. SviridaORCiD, M.A. Szelezniak, Jun TakahashiORCiD, Aihong TangORCiD, Zebo TangORCiD, Terence J. TarnowskyORCiD, Abdel Nasser TawfikORCiD, James H. ThomasORCiD, Anthony Robert TimminsORCiD, David Tlusty, Mikhail V. Tokarev, Stephen TrentalangeORCiD, Robert E. Tribble, Prithwish TribedyORCiDGND, Srikanta Kumar TripathyORCiD, Barbara Antonina TrzeciakORCiD, Oleg D. Tsai, Thomas UllrichORCiDGND, David G. UnderwoodORCiD, Isaac Upsal, Gene Van BurenORCiD, G. van Nieuwenhuizen, M. Vandenbroucke, Raghava Varma, Alexander Nikolaevich Vasiliev, Róbert VértesiORCiD, Flemming VidebækORCiD, Yogendra P. Viyogi, Stanislav Vokal, Sergei VoloshinORCiDGND, A. Vossen, Y. Wang, F. Wang, H. Wang, J.S. Wang, G. Wang, Y. Wang, Jason C. WebbORCiD, Grant Webb, L. Wen, Gary D. WestfallGND, Howard Wieman, Scott W. WissinkORCiD, Richard WittORCiD, Y.F. Wu, Z. Xiao, W. Xie, K. Xin, Z. Xu, Qinghua XuORCiD, 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 YooORCiDGND, N. Yu, Hanna Paulina ZbroszczykORCiD, Wangmei ZhaORCiD, 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, Youlia Zoulkarneeva, Maksym ZyzakGND
URN:urn:nbn:de:hebis:30:3-849588
DOI:https://doi.org/10.1016/j.physletb.2015.08.044
ISSN:0370-2693
ArXiv Id:http://arxiv.org/abs/1501.05341
Parent Title (English):Physics Letters B
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Date of Publication (online):2015/08/31
Date of first Publication:2015/08/20
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Creating Corporation:STAR Collaboration
Release Date:2024/08/13
Volume:750
Page Number:8
First Page:64
Last Page:71
Institutes:Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International