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Adams, John ; Adler, Clemens ; Aggarwal, Madan Mohan ; Ahammed, Zubayer ; Amonett, John ; Anderson, Bryon D. ; Anderson, Mike ; Arkhipkin, Dmitry A. ; Averichev, Georgy S. ; Badyal, S. K. ; Balewski, Jan ; Barannikova, Olga ; Barnby, Lee Stuart ; Baudot, Jérome ; Bekele, Selemon ; Belaga, Victoria Vladimirovna ; Bellwied, Rene ; Berger, Jens ; Bezverkhny, B. I. ; Bhardwaj, S. ; Bhaskar, P. ; Bhati, Ashok Kumar ; Bichsel, Hans ; Billmeier, Anja ; Bland, Leslie C. ; Blyth, Charles O. ; Bonner, Billy E. ; Botje, Michiel ; Boucham, Abdelkrim ; Brandin, Andrei V. ; Bravar, Alessandro ; Cadman, R. V. ; Cai, Xiang-Zhou ; Caines, Helen Louise ; Calderón de la Barca Sánchez, Manuel ; Carroll, J. ; Castillo Castellanos, Javier Ernesto ; Castro, M. ; Cebra, Daniel A. ; Chaloupka, Petr ; Chattopadhyay, S. ; Chen, H. F. ; Chen, Y. ; Chernenko, S. P. ; Cherney, Michael Gerard ; Chikanian, Alexei ; Choi, B. ; Christie, William ; Coffin, Jean Pierre ; Cormier, Thomas Michael ; Cramer, John G. ; Crawford, Henry J. ; Das, Debasish ; Das, Supriya ; Derevschikov, Anatoly A. ; Didenko, Lidia ; Dietel, Thomas ; Dong, W. J. ; Dong, Xin ; Draper, James E. ; Du, F. ; Dubey, Anand Kumar ; Dunin, V. B. ; Dunlop, James C. ; Dutta Majumdar, Mihir Ranjan ; Eckardt, Volker ; Efimov, Leonid G. ; Emelianov, V. ; Engelage, Jon M. ; Eppley, Geary Wareham ; Erazmus, Barbara Ewa ; Estienne, Magali Danielle ; Fachini, Patricia ; Faine, V. ; Faivre, Julien ; Fatemi, Renee H. ; Filimonov, Kirill ; Filip, Peter ; Finch, Evan ; Fisyak, Yuri V. ; Flierl, Dominik Bernhard ; Foley, K. J. ; Fu, J. ; Gagliardi, Carl A. ; Gagunashvili, N. ; Gans, J. ; Ganti, Murthy S. ; Gaudichet, L. ; Germain, Marie ; Geurts, Frank ; Ghazikhanian, Vahe ; Ghosh, Premomoy ; Gonzalez, Johan Enmanuel ; Grachov, Oleg A. ; Grigoriev, Vladislav A. ; Gronstal, S. ; Grosnick, David P. ; Guedon, M. ; Guertin, Steven M. ; Gupta, Anik ; Gushin, E. ; Gutierrez, Thomas Dominic ; Hallman, Timothy J. ; Hardtke, David H. ; Harris, John W. ; Heinz, Mark Thomas ; Henry, Thomas W. ; Heppelmann, Steven Francis ; Herston, T. ; Hippolyte, Boris ; Hirsch, Andrew S. ; Hjort, Eric ; Hoffmann, Gerald W. ; Horsley, M. ; Huang, Huan Zhong ; Huang, Shengli ; Humanic, Thomas J. ; Igo, George J. ; Ishihara, A. ; Jacobs, Peter Martin ; Jacobs, William W. ; Janik, Michał ; Jiang, H. ; Johnson, I. ; Jones, Peter Graham ; Judd, Eleanor G. ; Kabana, Sonia ; Kaneta, Kaneta ; Kaplan, Morton ; Keane, Declan ; Khodyrev, V. Yu. ; Kiryluk, Joanna ; Kisiel, Adam Ryszard ; Klay, Jennifer Lynn ; Klein, Spencer Robert ; Klyachko, A. ; Koetke, Donald D. ; Kollegger, Thorsten ; Kopytine, M. ; Kotchenda, L. ; Kovalenko, A. D. ; Kramer, M. ; Kravtsov, Peter ; Kravtsov, Vladimir I. ; Krueger, Keith William ; Kuhn, Christian Claude ; Kulikov, Anatoly I. ; Kumar, Ajay ; Kunde, Gerd J. ; Kunz, Christopher Lee ; Kutuev, R. Kh. ; Kuznetsov, A. A. ; Lamont, Matthew A. C. ; Landgraf, Jeffery M. ; Lange, S. ; Lansdell, Curtis Patrick Leon ; Lasiuk, Brian ; Laue, Frank ; Lauret, Jerome ; Lebedev, Alexei ; Lednický, Richard ; LeVine, Micheal J. ; Li, C. ; Li, Q. ; Lindenbaum, Sam J. ; Lisa, Michael A. ; Liu, F. ; Liu, L. ; Liu, Z. ; Liu, Q. J. ; Ljubicic, Tonko A. ; Llope, William Joseph ; Long, H. ; Longacre, Ronald S. ; Lopez-Noriega, M. ; Love, William A. ; Ludlam, Thomas ; Lynn, David ; Ma, Jing-guo ; Ma, Yu-Gang ; Magestro, Daniel ; Mahajan, Sanjay ; Mangotra, Lalit K. ; Mahapatra, D. P. ; Majka, Richard Daniel ; Manweiler, Robert W. ; Margetis, Spyridon ; Markert, Christina ; Martin, L. ; Marx, Jay N. ; Matis, Howard S. ; Matulenko, Yuri A. ; McShane, Tom S. ; Meissner, F. ; Melnick, Yu. ; Meščanin, Aleksei P. ; Messer, Matthias ; Miller, M. L. ; Milosevich, Z. ; Minaev, Nikolai G. ; Mironov, Camelia ; Mishra, Debadeepti ; Mitchell, J. ; Mohanty, Bedangadas ; Molnar, Levente ; Moore, C. F. ; Mora-Corral, M. J. ; Morozov, Dmitry A. ; Morozov, V. ; de Moura, M. M. ; Munhoz, Marcelo Gameiro ; Nandi, Basanta Kumar ; Nayak, S. K. ; Nayak, Tapan Kumar ; Nelson, John M. ; Nevski, P. ; Nikitin, Vladimir A. ; Nogach, Larisa V. ; Norman, B. ; Nurušev, Sandibek B. ; Odyniec, Grazyna Janina ; Ogawa, Akio ; Okorokov, Vitaly A. ; Oldenburg, Markus D. ; Olson, Douglas L. ; Paic, Guy ; Pandey, S. U. ; Pal, Susanta Kumar ; Panebratsev, Yuri ; Panitkin, Sergei Yurievich ; Pavlinov, A. I. ; Pawlak, Tomasz Jan ; Perevoztchikov, V. ; Perkins, Chris ; Peryt, Wiktor Stanislaw ; Petrov, V. A. ; Phatak, S. C. ; Picha, R. ; Planinic, Mirko ; Pluta, Jan Marian ; Porile, Norbert T. ; Porter, Jeffrey Brent ; Poskanzer, Arthur M. ; Potekhin, Maxim ; Potrebenikova, E. ; Potukuchi, B. V. K. S. ; Prindle, Duncan J. ; Pruneau, Claude A. ; Putschke, Jörn H. ; Rai, Gulshan ; Rakness, Gregory L. ; Raniwala, Rashmi ; Raniwala, Sudhir ; Ravel, Olivier ; Ray, Robert L. ; Razin, Sergej V. ; Reichhold, Dennis Michael ; Reid, Jeffrey G. ; Renault, G. ; Retiere, Fabrice ; Ridiger, Alexey ; Ritter, Hans Georg ; Roberts, Jabus B. ; Rogachevski, O. V. ; Romero, Juan L. ; Rose, A. ; Roy, Christelle Sophie ; Ruan, Lijuan ; Sahoo, Raghunath ; Sakrejda, Iwona ; Salur, Sevil ; Sandweiss, Jack H. ; Savin, Igor A. ; Schambach, Joachim ; Scharenberg, Rolf Paul ; Schmitz, Norbert ; Schroeder, Lee S. ; Schweda, Kai ; Seger, Janet Elizabeth ; Seliverstov, D. ; Seyboth, Peter ; Shahaliev, Ehtiram ; Shao, M. ; Sharma, M. ; Shestermanov, Konstantin E. ; Shimanskii, S. S. ; Singaraju, Rama Narayana ; Simon, F. ; Skoro, Goran P. ; Smirnov, Nikolai ; Snellings, Raimond ; Sood, Gopika ; Sorensen, Paul Richard ; Sowinski, James ; Spinka, Harold. M. ; Srivastava, Brijesh Kumar ; Stanislaus, S. ; Stock, Reinhard ; Stolpovsky, Alexander ; Strichanov, Michail Nikolaevič ; Stringfellow, Blair ; Struck, Christof ; Suaide, Alexandre Alarcon do Passo ; Sugarbaker, Evan R. ; Suire, Christophe Pierre ; Šumbera, Michal ; Surrow, Bernd ; Symons, Timothy James MacNeil ; Toledo, Alejandro Szanto de ; Szarwas, Piotr ; Tai, An ; Takahashi, Jun ; Tang, Aihong ; Thein, Dylan ; Thomas, James H. ; Tikhomirov, V. ; Tokarev, Mikhail V. ; Tonjes, Marguerite Belt ; Trainor, Thomas A. ; Trentalange, Stephen ; Tribble, Robert E. ; Trivedi, M. D. ; Trofimov, V. ; Tsai, Oleg D. ; Ullrich, Thomas ; Underwood, David G. ; Van Buren, Gene ; Vander Molen, A. M. ; Vasiliev, Alexander Nikolaevich ; Vasiliev, M. ; Vigdor, Steven E. ; Viyogi, Yogendra P. ; Voloshin, Sergei ; Waggoner, William T. ; Wang, Fuqiang ; Wang, Gang ; Wang, X. L. ; Wang, Z. M. ; Ward, H. ; Watson, J. W. ; Wells, R. ; Westfall, Gary D. ; Whitten, Charles A. ; Wieman, Howard ; Willson, Robert ; Wissink, Scott W. ; Witt, Richard ; Wood, J. ; Wu, J. ; Xu, N. ; Xu, Z. ; Xu, Z. Z. ; Yamamoto, E. ; Yepes, Pablo P. ; Yurevich, Vladimir Yurevich ; Zanevski, Y. V. ; Zborovský, I. ; Zhang, Haitao ; Zhang, W. M. ; Zhang, Z. P. ; Żołnierczuk, Piotr Adam ; Zoulkarneev, R. ; Zoulkarneeva, J. ; Zubarev, A. N.
We report the first observations of the first harmonic (directed flow, v1) and the fourth harmonic (v4), in the azimuthal distribution of particles with respect to the reaction plane in Au+Au collisions at the BNL Relativistic Heavy Ion Collider (RHIC). Both measurements were done taking advantage of the large elliptic flow (v2) generated at RHIC. From the correlation of v2 with v1 it is determined that v2 is positive, or in-plane. The integrated v4 is about a factor of 10 smaller than v2. For the sixth (v6) and eighth (v8) harmonics upper limits on the magnitudes are reported.
Adams, John ; Aggarwal, Madan Mohan ; Ahammed, Zubayer ; Amonett, John ; Anderson, Bryon D. ; Arkhipkin, Dmitry A. ; Averichev, Georgy S. ; Badyal, S. K. ; Bai, Yu ; Balewski, Jan ; Barannikova, Olga ; Barnby, Lee Stuart ; Baudot, Jérome ; Bekele, Selemon ; Belaga, Victoria Vladimirovna ; Bellwied, Rene ; Berger, Jens ; Bezverkhny, B. I. ; Bharadwa, S. ; Bhasin, Anju ; Bhati, Ashok Kumar ; Bhatia, V. S. ; Bichsel, Hans ; Billmeier, Anja ; Bland, Leslie C. ; Blyth, Charles O. ; Bonner, Billy E. ; Botje, Michiel ; Boucham, Abdelkrim ; Brandin, Andrei V. ; Bravar, Alessandro ; Bystersky, M. ; Cadman, R. V. ; Cai, X. Z. ; Caines, Helen Louise ; Calderón de la Barca Sánchez, Manuel ; Castillo Castellanos, Javier Ernesto ; Cebra, Daniel A. ; Chajecki, Zbigniew ; Chaloupka, Petr ; Chattopadhyay, S. ; Chen, H. F. ; Chen, Y. ; Cheng, J. ; Cherney, Michael Gerard ; Chikanian, Alexei ; Christie, William ; Coffin, J. P. ; Cormier, Thomas Michael ; Cramer, John G. ; Crawford, Henry J. ; Das, Debasish ; Das, S. ; Moura, M. M. de ; Derevschikov, Anatoly A. ; Didenko, Lidia ; Dietel, Thomas ; Dogra, Sunil Manohar ; Dong, W. J. ; Dong, X. ; Draper, James E. ; Du, F. ; Dubey, Anand Kumar ; Dunin, V. B. ; Dunlop, James C. ; Dutta Mazumdar, M. R. ; Eckardt, Volker ; Edwards, W. R. ; Efimov, L. G. ; Emelianov, V. ; Engelage, Jon M. ; Eppley, Geary Wareham ; Erazmus, Barbara Ewa ; Estienne, Magali Danielle ; Fachini, Patricia ; Faivre, Julien ; Fatemi, Renee H. ; Fedorišin, Jan ; Filimonov, Kirill ; Filip, Peter ; Finch, Evan ; Fine, Valeri ; Fisyak, Yuri V. ; Fomenko, K. ; Grebenyuk, Oleksandr ; Grosnick, David P. ; Guertin, Steven M. ; Guo, Y. ; Gupta, Anik ; Gutierrez, Thomas Dominic ; Hallman, Timothy J. ; Hamed, Ahmed M. ; Hardtke, David H. ; Harris, John W. ; Heinz, M. ; Henry, Thomas W. ; Hepplemann, S. ; Hippolyte, Boris ; Hirsch, Andrew S. ; Hjort, Eric ; Hoffmann, G. W. ; Huang, H. Z. ; Huang, S. L. ; Hughes, Emlyn Willard ; Humanic, Thomas J. ; Igo, George J. ; Ishihara, A. ; Jacobs, Peter Martin ; Jacobs, W.W. ; Janik, Michał ; Jiang, H. ; Jones, Peter Graham ; Judd, Eleanor G. ; Kabana, Sonia ; Kang, K. ; Kaplan, Morton ; Keane, Declan ; Khodyrev, V. Yu. ; Kiryluk, Joanna ; Kisiel, Adam Ryszard ; Kislov, E. M. ; Klay, Jennifer Lynn ; Klein, Spencer Robert ; Klyachko, A. ; Koetke, Donald D. ; Kollegger, Thorsten ; Kopytine, M. ; Kotchenda, L. ; Kramer, M. ; Kravtsov, Peter ; Kravtsov, Vladimir I. ; Krueger, Keith William ; Kuhn, Christian Claude ; Kulikov, Anatoly I. ; Kumar, Ajay ; Kutuev, R.Kh. ; Kuznetsov, A.A. ; Lamont, Matthew A. C. ; Landgraf, Jeffery M. ; Lange, Jens Sören ; Laue, Frank ; Lauret, Jerome ; Lebedev, Alexei ; Lednicky, Richard ; Lehocka, S. ; LeVine, Micheal J. ; Li, C. ; Li, Q. ; Li, Y. ; Lin, G. ; Lindenbaum, S. J. ; Lisa, Michael A. ; Liu, F. ; Liu, L. ; Liu, Q.J. ; Liu, Z. ; Ljubicic, Tonko A. ; Llope, William Joseph ; Long, H. ; Longacre, Ronald S. ; López Noriega, M. ; Love, William A. ; Lu, Y. ; Ludlam, Thomas ; Lynn, David ; Ma, G. L. ; Ma, Jing-guo ; Ma, Y. G. ; Magestro, Daniel ; Mahajan, Sanjay ; Mahapatra, D. P. ; Majka, Richard Daniel ; Mangotra, Lalit K. ; Manweiler, Robert W. ; Margetis, Spyridon ; Markert, Christina ; Martin, L. ; Marx, Jay N. ; Matis, Howard S. ; Matulenko, Yuri A. ; McClain, C. J. ; McShane, T. S. ; Meissner, F. ; Melnick, Yu. ; Meščanin, Aleksei P. ; Miller, M. L. ; Minaev, Nikolai G. ; Mironov, Camelia ; Mischke, André ; Mishra, D. K. ; Mitchell, J. ; Mohanty, Bedangadas ; Molnar, Levente ; Moore, C. F. ; Morozov, D. A. ; Munhoz, Marcelo Gameiro ; Nandi, Basanta Kumar ; Nayak, S. K. ; Nayak, Tapan Kumar ; Nelson, John M. ; Netrakanti, Pawan Kumar ; Nikitin, Vladimir A. ; Nogach, Larisa V. ; Nurušev, Sandibek B. ; Odyniec, Grazyna Janina ; Ogawa, Akio ; Okorokov, Vitaly A. ; Oldenburg, Markus D. ; Olson, Douglas L. ; Pal, Susanta Kumar ; Panebratsev, Yuri ; Panitkin, Sergei Yurievich ; Pavlinov, A. I. ; Pawlak, Tomasz Jan ; Peitzmann, Thomas ; Pluta, Jan Marian ; Porile, Norbert T. ; Porter, Jeffrey Brent ; Poskanzer, Arthur M. ; Potekhin, Maxim ; Potrebenikova, E. ; Potukuchi, B. V. K. S. ; Prindle, Duncan J. ; Pruneau, Claude A. ; Putschke, Jörn H. ; Rakness, Gregory L. ; Raniwala, Rashmi ; Raniwala, Sudhir ; Ravel, Olivier ; Ray, Robert L. ; Razin, Sergej V. ; Reichhold, Dennis Michael ; Reid, Jeffrey G. ; Renault, G. ; Retiere, Fabrice ; Ridiger, Alexey ; Ritter, Hans Georg ; Roberts, Jabus B. ; Rogačevskij, Oleg V. ; Romero, Juan L. ; Rose, A. ; Roy, Christelle Sophie ; Ruan, Lijuan ; Sahoo, Raghunath ; Sakrejda, Iwona ; Salur, Sevil ; Sandweiss, Jack H. ; Savin, Igor A. ; Sazhin, P. S. ; Schambach, Joachim ; Scharenberg, Rolf Paul ; Schmitz, Norbert ; Schweda, Kai ; Seger, Janet Elizabeth ; Seyboth, Peter ; Shahaliev, Ehtiram ; Shao, M. ; Shao, W. ; Sharma, M. ; Shen, W. Q. ; Shestermanov, Konstantin E. ; Shimanskiy, S. S. ; Sichtermann, E ; Simon, F. ; Singaraju, R. N. ; Skoro, Goran P. ; Smirnov, Nikolai ; Snellings, Raimond ; Sood, Gopika ; Sorensen, Paul Richard ; Sowinski, James ; Speltz, Jeff ; Spinka, Harold. M. ; Srivastava, Brijesh Kumar ; Stadnik, A. ; Stadnik, A. ; Stanislaus, T. D. Shirvel ; Stock, Reinhard ; Stock, Reinhard ; Stolpovsky, Alexander ; Strichanov, Michail Nikolaevič ; Stringfellow, Blair ; Suaide, Alexandre Alarcon do Passo ; Sugarbaker, Evan R. ; Suire, Christophe Pierre ; Sumbera, M. ; Surrow, Bernd ; Symons, T. J. M. ; Toledo, Alejandro Szanto de ; Szarwas, Piotr ; Tai, An ; Takahashi, Jun ; Tang, A. H. ; Tarnowsky, Terence J. ; Thein, Dylan ; Thomas, James H. ; Timoshenko, Sergei ; Tokarev, Mikhail V. ; Trainor, Thomas A. ; Trentalange, Stephen ; Tribble, Robert E. ; Tsai, Oleg D. ; Ulery, Jason Glyndwr ; Ullrich, Thomas ; Underwood, David G. ; Urkinbaev, Anarbay ; Van Buren, Gene ; Ward, H. ; Watson, J. W. ; Webb, Jason C. ; Wells, R. ; Westfall, G. D. ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Wieman, H. ; Wissink, Scott W. ; Witt, Richard ; Wood, J. ; Wu, J. ; Xu, N. ; Xu, Z. ; Xu, Z. Z. ; Yamamoto, E. ; Yepes, Pablo P. ; Yurevich, Vladimir I. ; Zanevsky, Yuri V. ; Zhang, Haitao ; Zhang, W. M. ; Zhang, Z. P. ; Zolnierczuk, Piotr Adam ; Zoulkarneev, R. ; Zoulkarneeva, Youlia ; Zubarev, A. N. ; Leeuwen, Marco van ; Vander Molen, A. M. ; Varma, Raghava ; Vasilevski, I. M. ; Vasiliev, Alexander Nikolaevich ; Verne, R. ; Vigdor, Steven E. ; Viyogi, Yogendra P. ; Vokal, Stanislav ; Voloshin, S. A. ; Vznuzdaev, Marat ; Waggoner, William T. ; Wang, F. ; Wang, G. ; Wang, X. L. ; Wang, Y. ; Wang, Y. ; Wang, Z. M.
We present a systematic analysis of two-pion interferometry in Au+Au collisions at sqrt[sNN]=200GeV using the STAR detector at Relativistic Heavy Ion Collider. We extract the Hanbury-Brown and Twiss radii and study their multiplicity, transverse momentum, and azimuthal angle dependence. The Gaussianness of the correlation function is studied. Estimates of the geometrical and dynamical structure of the freeze-out source are extracted by fits with blast-wave parametrizations. The expansion of the source and its relation with the initial energy density distribution is studied.
Adams, John ; Adler, Clemens ; Ahammed, Zubayer ; Allgower, Chris ; Amonett, John ; Anderson, Bryon D. ; Anderson, Mike ; Arkhipkin, Dmitry A. ; Averichev, Georgy S. ; Balewski, Jan ; Barannikova, Olga ; Barnby, Lee Stuart ; Baudot, Jérome ; Bekele, Selemon ; Belaga, Victoria Vladimirovna ; Bellwied, Rene ; Berger, Jens ; Bichsel, Hans ; Billmeier, Anja ; Bland, Leslie C. ; Blyth, Charles O. ; Bonner, Billy E. ; Botje, Michiel ; Boucham, Abdelkrim ; Brandin, Andrei V. ; Bravar, Alessandro ; Cadman, R. V. ; Cai, Xiang-Zhou ; Caines, Helen Louise ; Calderón de la Barca Sánchez, Manuel ; Cardenas, Alex ; Carroll, J. ; Castillo Castellanos, Javier Ernesto ; Castro, M. ; Cebra, Daniel A. ; Chaloupka, Petr ; Chattopadhyay, S. ; Chen, Yu ; Chernenko, S. P. ; Cherney, Michael Gerard ; Chikanian, Alexei ; Choi, Bum ; Christie, William ; Coffin, Jean Pierre ; Cormier, Thomas Michael ; Corral, M. Mora ; Cramer, John G. ; Crawford, Henry J. ; Derevschikov, Anatoly A. ; Didenko, Lidia ; Dietel, Thomas ; Draper, James E. ; Dunin, V. B. ; Dunlop, James C. ; Eckardt, Volker ; Efimov, Leonid G. ; Emelianov, V. ; Engelage, Jon M. ; Eppley, Geary Wareham ; Erazmus, Barbara Ewa ; Fachini, Patricia ; Faine, V. ; Faivre, Julien ; Fatemi, Renee H. ; Filimonov, Kirill ; Finch, Evan ; Fisyak, Yuri V. ; Flierl, Dominik Bernhard ; Foley, K. J. ; Fu, Jinghua ; Gagliardi, Carl A. ; Gagunashvili, N. ; Gans, Jon ; Gaudichet, Ludovic ; Germain, Marie ; Geurts, Frank ; Ghazikhanian, Vahe ; Grachov, Oleg A. ; Guedon, M. ; Guertin, Steven M. ; Gushin, E. ; Gutierrez, Thomas Dominic ; Hallman, Timothy J. ; Hardtke, David H. ; Harris, John W. ; Heinz, Mark ; Henry, Thomas W. ; Heppelmann, Steven Francis ; Herston, Timothy ; Hippolyte, Boris ; Hirsch, Andrew S. ; Hjort, Eric ; Hoffmann, Gerald W. ; Horsley, Matthew ; Huang, Huan Zhong ; Humanic, Thomas J. ; Igo, George J. ; Ishihara, Aya ; Jacobs, Peter Martin ; Jacobs, William W. ; Janik, Michał ; Johnson, Ian ; Jones, Peter Graham ; Judd, Eleanor G. ; Kabana, Sonia ; Kaneta, Kaneta ; Kaplan, Morton ; Keane, Declan ; Kiryluk, Joanna ; Kisiel, Adam Ryszard ; Klay, Jennifer Lynn ; Klein, Spencer Robert ; Klyachko, A. ; Kollegger, Thorsten ; Konstantinov, A. S. ; Kopytine, M. ; Kotchenda, L. ; Kovalenko, A. D. ; Kramer, M. ; Kravtsov, Peter ; Krueger, Keith William ; Kuhn, Christian Claude ; Kulikov, Anatoly I. ; Kunde, Gerd J. ; Kunz, Christopher Lee ; Kutuev, R. Kh. ; Kuznetsov, A. A. ; Lamont, Matthew A. C. ; Landgraf, Jeffery M. ; Lange, S. ; Lansdell, Curtis Patrick Leon ; Lasiuk, Brian ; Laue, Frank ; Lauret, Jerome ; Lebedev, Alexei ; Lednický, Richard ; Leontiev, V. M. ; LeVine, Micheal J. ; Li, Q. ; Lindenbaum, Sam J. ; Lisa, Michael A. ; Liu, Feng ; Liu, L. ; Liu, Zhixu ; Liu, Q. J. ; Ljubicic, Tonko A. ; Llope, William Joseph ; Long, Hui ; Longacre, Ronald S. ; Lopez-Noriega, Mercedes ; Love, William A. ; Ludlam, Thomas ; Lynn, David ; Ma, Jingguo ; Ma, Yu-Gang ; Magestro, Daniel ; Majka, Richard Daniel ; Margetis, Spyridon ; Markert, Christina ; Martin, L. ; Marx, Jay N. ; Matis, Howard S. ; Matulenko, Yuri A. ; McShane, Tom S. ; Meissner, F. ; Melnick, Yu. ; Meščanin, Aleksei P. ; Messer, Matthias ; Miller, Michael L. ; Milosevich, Z. ; Minaev, Nikolai G. ; Mitchell, J. ; Molnar, Levente ; Moore, C. F. ; Morozov, Vladimir ; de Moura, M. M. ; Munhoz, Marcelo Gameiro ; Nelson, John M. ; Nevski, P. ; Nikitin, Vladimir A. ; Nogach, Larisa V. ; Norman, Ben ; Nurušev, Sandibek B. ; Odyniec, Grazyna Janina ; Ogawa, Akio ; Okorokov, Vitaly A. ; Oldenburg, Markus D. ; Olson, Douglas L. ; Paic, Guy ; Pandey, S. U. ; Panebratsev, Yuri ; Panitkin, Sergei Yurievich ; Pavlinov, A. I. ; Pawlak, Tomasz Jan ; Perevoztchikov, V. ; Peryt, Wiktor Stanislaw ; Petrov, V. A ; Picha, R. ; Planinic, Mirko ; Pluta, Jan Marian ; Porile, Norbert T. ; Porter, Jeffrey Brent ; Poskanzer, Arthur M. ; Potrebenikova, E. ; Prindle, Duncan J. ; Pruneau, Claude A. ; Putschke, Jörn H. ; Rai, Gulshan ; Rakness, Gregory L. ; Ravel, Olivier ; Ray, Robert L. ; Razin, Sergej V. ; Reichhold, Dennis Michael ; Reid, Jeffrey G. ; Renault, Gael ; Retiere, Fabrice ; Ridiger, Alexey ; Ritter, Hans Georg ; Roberts, Jabus B. ; Rogachevski, O. V. ; Romero, Juan L. ; Rose, A. ; Roy, Christelle Sophie ; Rykov, Vladimir L. ; Sakrejda, Iwona ; Salur, Sevil ; Sandweiss, Jack H. ; Savin, Igor A. ; Schambach, Joachim ; Scharenberg, Rolf Paul ; Schmitz, Norbert ; Schroeder, Lee S. ; Schweda, Kai ; Seger, Janet Elizabeth ; Seyboth, Peter ; Shahaliev, Ehtiram ; Shestermanov, Konstantin E. ; Shimanskii, S. S. ; Simon, Frank ; Skoro, Goran P. ; Smirnov, Nikolai ; Snellings, Raimond ; Sorensen, Paul ; Sowinski, James ; Spinka, Harold. M. ; Srivastava, Brijesh Kumar ; Stephenson, Edward J. ; Stock, Reinhard ; Stolpovsky, Alexander ; Strichanov, Michail Nikolaevič ; Stringfellow, Blair ; Struck, Christof ; Suaide, Alexandre Alarcon do Passo ; Sugarbaker, Evan R. ; Suire, Christophe Pierre ; Šumbera, Michal ; Surrow, Bernd ; Symons, Timothy James MacNeil ; Toledo, Alejandro Szanto de ; Szarwas, Piotr ; Tai, An ; Takahashi, Jun ; Tang, Aihong ; Thein, Dylan ; Thomas, James H. ; Thompson, M. ; Timoshenko, Sergei ; Tokarev, Mikhail V. ; Tonjes, Marguerite B. ; Trainor, Thomas A. ; Trentalange, Stephen ; Tribble, Robert E. ; Trofimov, V. ; Tsai, Oleg D. ; Ullrich, Thomas ; Underwood, David G. ; Van Buren, Gene ; Vander Molen, A. M. ; Vasiliev, Alexander Nikolaevich ; Vigdor, Steven E. ; Voloshin, Sergei ; Vznuzdaev, Marat ; Wang, F. ; Wang, Yiqun ; Ward, H. ; Watson, J. W. ; Wells, Randy ; Westfall, Gary D. ; Whitten, Charles A. ; Wieman, Howard ; Willson, Robert ; Wissink, Scott W. ; Witt, Richard ; Wood, Jeff ; Xu, N. ; Xu, Zhangbu ; Yakutin, A. E. ; Yamamoto, Eugene ; Yang, J. ; Yepes, Pablo P. ; Yurevich, Vladimir Yurevich ; Zanevski, Y. V. ; Zborovský, I. ; Zhang, Haitao ; Zhang, W. M. ; Zoulkarneev, R. ; Zoulkarneeva, J. ; Zubarev, A. N.
Data from the first physics run at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory, Au+Au collisions at sqrt[sNN]=130 GeV, have been analyzed by the STAR Collaboration using three-pion correlations with charged pions to study whether pions are emitted independently at freeze-out. We have made a high-statistics measurement of the three-pion correlation function and calculated the normalized three-particle correlator to obtain a quantitative measurement of the degree of chaoticity of the pion source. It is found that the degree of chaoticity seems to increase with increasing particle multiplicity.
Afanasiev, Sergey V. ; Antičić, Tome ; Bächler, Joachim ; Barna, Daniel ; Barnby, Lee Stuart ; Bartke, Jerzy ; Barton, Robert Allan ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blume, Christoph ; Blyth, Charles O. ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Brady, Franklin Paul ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Carr, Lincoln D. ; Cebra, Daniel A. ; Cooper, Glenn E. ; Cramer, John G. ; Csató, Péter ; Eckardt, Volker ; Eckhardt, Frank ; Ferenc, Daniel ; Filip, Peter ; Fischer, Hans Gerhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Ftacnik, Jan ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz-Dziaduś, Ewa ; Harris, John W. ; Hegyi, Sándor ; Hlinka, V. ; Höhne, Claudia ; Igo, George J. ; Ivanov, Marian ; Jacobs, Peter Martin ; Janik, Rudolf ; Jones, Peter Graham ; Kadija, Krešo ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kowalski, Marek ; Lasiuk, Brian ; Leeuwen, Marco van ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Mischke, André ; Molnár, József ; Nelson, John M. ; Odyniec, Grazyna Janina ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Poskanzer, Arthur M. ; Prindle, Duncan J. ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Ritter, Hans Georg ; Röhrich, Dieter ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sammer, Thomas ; Sandoval, Andres ; Sann, Hans ; Schäfer, Erich ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Snellings, Raimond ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Strmen, Peter ; Ströbele, Herbert ; Šuša, Tatjana ; Szarka, Imrich ; Szentpétery, Imre ; Sziklai, János ; Toy, Milton Y. ; Trainor, Thomas A. ; Trentalange, Stephen ; Ullrich, Thomas ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Voloshin, Sergei ; Vranić, Danilo ; Wang, Feipeng ; Weerasundara, Dhammika D. ; Wenig, Siegfried ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Xu, Nu ; Yates, Tim A. ; Yoo, In-Kwon ; Zimányi, József
We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio of charged kaons to charged pions is determined for individual central Pb+Pb collisions. After accounting for the fluctuations due to detector resolution and finite number statistics we derive an upper limit on genuine non-statistical fluctuations, perhaps related to a first or second order QCD phase transition. Such fluctuations are shown to be very small.
Afanasiev, Sergey V. ; Antičić, Tome ; Barna, Daniel ; Bartke, Jerzy ; Barton, Robert Allan ; Behler, Matthias ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blume, Christoph ; Blyth, Charles O. ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Cerny, Vladimír ; Cramer, John G. ; Csató, Péter ; Dinkelaker, Peter ; Eckardt, Volker ; Filip, Peter ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz-Dziaduś, Ewa ; Hegyi, Sándor ; Höhne, Claudia ; Igo, George J. ; Jones, Peter Graham ; Kadija, Krešo ; Karev, Alexandre ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Mischke, André ; Molnár, József ; Nelson, John M. ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sammer, Thomas ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Ströbele, Herbert ; Šuša, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
Measurements of charged pion and kaon production in central Pb+Pb collisions at 40, 80 and 158 AGeV are presented. These are compared with data at lower and higher energies as well as with results from p+p interactions. The mean pion multiplicity per wounded nucleon increases approximately linearly with s_NN^1/4 with a change of slope starting in the region 15-40 AGeV. The change from pion suppression with respect to p+p interactions, as observed at low collision energies, to pion enhancement at high energies occurs at about 40 AGeV. A non-monotonic energy dependence of the ratio of K^+ to pi^+ yields is observed, with a maximum close to 40 AGeV and an indication of a nearly constant value at higher energies.The measured dependences may be related to an increase of the entropy production and a decrease of the strangeness to entropy ratio in central Pb+Pb collisions in the low SPS energy range, which is consistent with the hypothesis that a transient state of deconfined matter is created above these energies. Other interpretations of the data are also discussed.
Afanasiev, Sergey V. ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Barton, Robert Allan ; Behler, Matthias ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blume, Christoph ; Blyth, Charles O. ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Černý, Vladimír ; Chvala, Ondrej ; Cramer, John G. ; Csató, Péter ; Dinkelaker, Peter ; Eckardt, Volker ; Filip, Peter ; Fodor, Zoltan ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz, Ewa ; Hegyi, Sándor ; Höhne, Claudia ; Igo, George J. ; Jones, Peter Graham ; Kadija, Krešo ; Karev, Alexandre ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lednicky, Richard ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Nelson, John M. ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sammer, Thomas ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Ströbele, Herbert ; Susa, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
Bose-Einstein correlations of charged kaons were measured near mid-rapidity in central Pb+Pb collisions at 158 A GeV by the NA49 experiment at the CERN SPS. Source radii were extracted using the Yano-Koonin-Podgoretsky and Bertsch-Pratt parameterizations. The results are compared to published pion data. The measured m_perp dependence for kaons and pions is consistent with collective transverse expansion of the source and a freeze-out time of about 9.5 fm.
Blume, Christoph ; Afanasiev, Sergey V. ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Barton, Robert Allan ; Behler, Matthias ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blyth, Charles O. ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Černý, Vladimír ; Chvala, Ondrej ; Cramer, John G. ; Csató, Péter ; Dinkelaker, Peter ; Eckardt, Volker ; Filip, Peter ; Fischer, Hans Gerhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz, Ewa ; Hegyi, Sándor ; Höhne, Claudia ; Igo, George J. ; Jones, Peter Graham ; Kadija, Krešo ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lednický, Richard ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Nelson, John M. ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sammer, Thomas ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Smolik, Jan ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Ströbele, Herbert ; Šuša, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wenig, Siegfried ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
The large acceptance and high momentum resolution as well as the significant particle identification capabilities of the NA49 experiment at the CERN SPS allow for a broad study of fluctuations and correlations in hadronic interactions. In the first part recent results on event-by-event charge and p_t fluctuations are presented. Charge fluctuations in central Pb+Pb reactions are investigated at three different beam energies (40, 80, and 158 AGeV), while for the p_t fluctuations the focus is put on the system size dependence at 158 AGeV. In the second part recent results on Bose Einstein correlations of h-h- pairs in minimum bias Pb+Pb reactions at 40 and 158 AGeV, as well as of K+K+ and K-K- pairs in central Pb+Pb collisions at 158 AGeV are shown. Additionally, other types of two particle correlations, namely pi p, Lambda p, and Lambda Lambda correlations, have been measured by the NA49 experiment. Finally, results on the energy and system size dependence of deuteron coalescence are discussed.
Mischke, André ; Afanasiev, Sergey V. ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Barton, Robert Allan ; Behler, Matthias ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blume, Christoph ; Blyth, Charles O. ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Cerny, Vladimír ; Chvala, Ondrej ; Cramer, John G. ; Csató, Péter ; Dinkelaker, Peter ; Eckardt, Volker ; Filip, Peter ; Fischer, Hans Gerhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz-Dziaduś, Ewa ; Hegyi, Sándor ; Höhne, Claudia ; Igo, George J. ; Jones, Peter Graham ; Kadija, Krešo ; Karev, Alexandre ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Nelson, John M. ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sammer, Thomas ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Ströbele, Herbert ; Šuša, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wenig, Siegfried ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
Rapidity distributions for Lambda and anti-Lambda hyperons in central Pb-Pb collisions at 40, 80 and 158 AGeV and for K 0 s mesons at 158 AGeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measurements and compared to model predictions. A different energy dependence of the Lambda/pi and anti-Lambda/pi is observed. The anti-Lambda/Lambda ratio shows a steep increase with collision energy. Evidence for a anti-Lambda/anti-p ratio greater than 1 is found at 40 AGeV.
Leeuwen, Marco van ; Afanasiev, Sergey V. ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Barton, Robert Allan ; Behler, Matthias ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blume, Christoph ; Blyth, Charles O. ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Černý, Vladimír ; Chvala, Ondrej ; Cramer, John G. ; Csató, Péter ; Dinkelaker, Peter ; Eckardt, Volker ; Filip, Peter ; Fischer, Hans Gerhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz, Ewa ; Hegyi, Sándor ; Höhne, Claudia ; Igo, George J. ; Jones, Peter Graham ; Kadija, Krešo ; Karev, Alexandre ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Nelson, John M. ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sammer, Thomas ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Ströbele, Herbert ; Šuša, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wenig, Siegfried ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
The energy dependence of hadron production in central Pb+Pb collisions is presented and discussed. In particular, midrapidity m_T-spectra for pi-, K-, K+, p, bar p, d, phi, Lambda and bar Lambda at 40, 80 and 158 AGeV are shown. In addition Xi and Omega spectra are available at 158 AGeV. The spectra allow to determine the thermal freeze-out temperature T and the transverse flow velocity beta_T at the three energies. We do not observe a significant energy dependence of these parameters; furthermore there is no indication of early thermal freeze-out of Xi and Omega at 158 AGeV. Rapidity spectra for pi-, K-, K+ and phi at 40, 80 and 158 AGeV are shown, as well as first results on Omega rapidity distributions at 158 AGeV. The chemical freeze-out parameters T and mu_B at the three energies are determined from the total yields. The parameters are close to the expected phase boundary in the SPS energy range and above. Using the total yields of kaons and lambdas, the energy dependence of the strangeness to pion ratio is discussed. A maximum in this ratio is found at 40 AGeV. This maximum could indicate the formation of deconfined matter at energies above 40 AGeV. A search for open charm in a large sample of 158 AGeV events is presented. No signal is observed. This result is compared to several model predictions.
Mischke, André ; Afanasiev, Sergey V. ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Barton, Robert Allan ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blyth, Charles O. ; Blume, Christoph ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Cerny, Vladimír ; Chvala, Ondrej ; Cramer, John G. ; Csató, Péter ; Dinkelaker, Peter ; Eckardt, Volker ; Filip, Peter ; Flierl, Dominik Bernhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz-Dziaduś, Ewa ; Hegyi, Sándor ; Höhne, Claudia ; Igo, George J. ; Jones, Peter Graham ; Kadija, Krešo ; Karev, Alexandre ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mitrovski, Michael Kosta ; Molnár, József ; Nelson, John M. ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sammer, Thomas ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Ströbele, Herbert ; Šuša, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wenig, Siegfried ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
Rapidity distributions for $\Lambda$ and $\bar{\Lambda}$ hyperons in central Pb-Pb collisions at 40, 80 and 158 A$\cdot$GeV and for ${\rm K}_{s}^{0}$ mesons at 158 A$\cdot$GeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measurements and compared to model predictions. A different energy dependence of the $\Lambda/\pi$ and $\bar{\Lambda}/\pi$ is observed. The $\bar{\Lambda}/\Lambda$ ratio shows a steep increase with collision energy. Evidence for a $\bar{\Lambda}/\bar{\rm p}$ ratio greater than 1 is found at 40 A$\cdot$GeV.