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Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Behler, Matthias ; Betev, Latchezar ; Białkowska, Helena ; Billimeier, Anja ; Blume, Christoph ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Černý, Vladimír ; Christakoglou, Panagiotis ; Chvala, Ondrej ; Cooper, Glenn E. ; 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 ; Jacobs, Peter Martin ; Kadija, Krešo ; Karev, Alexandre ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Malakhov, Aleksandr I. ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Mrówczyński, Stanislaw ; 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 ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Stefanek, Grzegorz ; 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 ; Włodarczyk, Zbigniew ; Xu, Nu ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimanyi, József
The transverse mass mt distributions for deuterons and protons are measured in Pb+Pb reactions near midrapidity and in the range 0<mt–m<1.0 (1.5) GeV/c2 for minimum bias collisions at 158A GeV and for central collisions at 40 and 80 A GeV beam energies. The rapidity density dn/dy, inverse slope parameter T and mean transverse mass <mt> derived from mt distributions as well as the coalescence parameter B2 are studied as a function of the incident energy and the collision centrality. The deuteron mt spectra are significantly harder than those of protons, especially in central collisions. The coalescence factor B2 shows three systematic trends. First, it decreases strongly with increasing centrality reflecting an enlargement of the deuteron coalescence volume in central Pb+Pb collisions. Second, it increases with mt. Finally, B2 shows an increase with decreasing incident beam energy even within the SPS energy range. The results are discussed and compared to the predictions of models that include the collective expansion of the source created in Pb+Pb collisions.
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.
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.
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.
Adler, Clemens ; Ahammed, Zubayer ; Allgower, Chris ; Anderson, Mike ; Averichev, Georgy S. ; Balewski, Jan ; Barannikova, Olga ; Barnby, Lee Stuart ; Baudot, Jérome ; Bekele, Selemon ; Belaga, Victoria Vladimirovna ; Bellwied, Rene ; Berger, Jens ; Bichsel, Hans ; Bland, Leslie C. ; Blyth, Charles O. ; Bonner, Billy E. ; Bossingham, R. ; Boucham, Abdelkrim ; Brandin, Andrei V. ; Caines, Helen Louise ; Calderón de la Barca Sánchez, Manuel ; Cardenas, Andrés ; Carroll, J. ; Castillo Castellanos, Javier Ernesto ; Castro, M. ; Cebra, Daniel A. ; Chattopadhyay, S. ; Chen, M. L. ; Chen, Y. ; Chernenko, Sergey P. ; Cherney, Michael Gerard ; Chikanian, Alexei ; Choi, B. ; Christie, William ; Coffin, Jean Pierre ; Conin, Laurent ; Cormier, Thomas Michael ; Cramer, John G. ; Crawford, Henry J. ; DeMello, M. ; Deng, W. S. ; Derevschikov, Anatoly A. ; Didenko, Lidia ; 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 ; Ferguson, M. I. ; Finch, Evan ; Fisyak, Yuri V. ; Flierl, Dominik Bernhard ; Foley, K. J. ; Gagunashvili, N. ; Gans, J. ; Germain, Marie ; Geurts, Frank ; Ghazikhanian, Vahe ; Grabski, J. ; Grachov, Oleg A. ; Greiner, D. ; Grigoriev, Vladislav A. ; Gushin, E. ; Hallman, Timothy J. ; Hardtke, David H. ; Harris, John W. ; Heffner, Michael D. ; Heppelmann, Steven Francis ; Herston, T. ; Hippolyte, Boris ; Hirsch, Andrew S. ; Hjort, Eric ; Hoffmann, Gerald W. ; Horsley, M. ; Huang, Huan Zhong ; Humanic, Thomas J. ; Hümmler, Holm Gero ; Igo, George J. ; Ishihara, A. ; Ivanshin, Yu. I. ; Jacobs, Peter Martin ; Jacobs, William W. ; Janik, Michał ; Johnson, I. ; Jones, Peter Graham ; Judd, Eleanor G. ; Kaneta, Kaneta ; Kaplan, Morton ; Keane, Declan ; Khodinov, A. ; Kisiel, Adam Ryszard ; Klay, Jennifer Lynn ; Klein, Spencer Robert ; Klyachko, A. ; Konstantinov, A. S. ; 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. ; Lamas-Valverde, Jose ; Lamont, Matthew A. C. ; Landgraf, Jeffery M. ; Lange, S. ; Lansdell, Curtis Patrick Leon ; Lasiuk, Brian ; Laue, Frank ; Lebedev, Alexei ; LeCompte, T. ; Leontiev, V. M. ; Leszczynski, P. ; LeVine, Micheal J. ; Li, Q. ; Li, Q. ; Lindenbaum, Sam J. ; Lisa, Michael A. ; Ljubicic, Tonko A. ; Llope, William Joseph ; LoCurto, G. ; Long, H. ; Longacre, Ronald S. ; Lopez-Noriega, M. ; Love, William A. ; Lynn, David ; Madansky, L. ; Majka, Richard Daniel ; Maliszewski, A. ; Margetis, Spyridon ; Martin, L. ; Marx, Jay N. ; Matis, Howard S. ; Matulenko, Yuri A. ; McShane, Tom S. ; Melnick, Yu. ; Meščanin, Aleksei P. ; Milosevich, Z. ; Minaev, Nikolai G. ; Mitchell, J. ; Moiseenko, V. A. ; Moltz, D. ; Moore, C. F. ; Morozov, V. ; de Moura, M. M. ; Munhoz, Marcelo Gameiro ; Mutchler, G. S. ; Nelson, John M. ; Nevski, P. ; Nikitin, Vladimir A. ; Nogach, Larisa V. ; Norman, B. ; Nurušev, Sandibek B. ; Nystrand, Joakim Ingemar ; Odyniec, Grazyna Janina ; Ogawa, Akio ; Ogilvie, C. 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 ; Pinganaud, W. ; Platner, E. ; Pluta, Jan Marian ; Porile, Norbert T. ; Porter, Jeffrey Brent ; Poskanzer, Arthur M. ; Potrebenikova, E. ; Prindle, Duncan J. ; Pruneau, Claude A. ; Radomski, S. ; Rai, Gulshan ; Ravel, Olivier ; Ray, Robert L. ; Razin, Sergej V. ; Reichhold, Dennis Michael ; Reid, Jeffrey G. ; Retiere, Fabrice ; Ridiger, Alexey ; Ritter, Hans Georg ; Roberts, Jabus B. ; Rogachevski, O. V. ; Roy, Christelle Sophie ; Russ, D. ; Rykov, Vladimir L. ; Sakrejda, Iwona ; Sandweiss, Jack H. ; Saulys, A. C. ; Savin, Igor A. ; Schambach, Joachim ; Scharenberg, Rolf Paul ; Schmitz, Norbert ; Schroeder, Lee S. ; Schüttauf, Andreas ; Schweda, Kai ; Seger, Janet Elizabeth ; Seliverstov, D. ; Seyboth, Peter ; Shestermanov, Konstantin E. ; Shimanskii, S. S. ; Shvetcov, V. S. ; Skoro, Goran P. ; Smirnov, Nikolai ; Snellings, Raimond ; Sowinski, James ; Spinka, Harold. M. ; Srivastava, Brijesh Kumar ; Stephenson, Edward J. ; Stock, Reinhard ; Stolpovsky, Alexander ; Strichanov, Michail Nikolaevič ; Stringfellow, Blair ; Ströbele, Herbert ; Struck, Christof ; Suaide, Alexandre Alarcon do Passo ; Sugarbaker, Evan R. ; Suire, Christophe Pierre ; Symons, Timothy James MacNeil ; de Toledo, A. Szanto ; Szarwas, Piotr ; Takahashi, Jun ; Tang, Aihong ; Thomas, James H. ; Tikhomirov, V. ; Trainor, Thomas A. ; Trentalange, Stephen ; Tokarev, Mikhail V. ; Tonjes, Marguerite Belt ; Trofimov, V. ; Tsai, Oleg D. ; Turner, K. ; Ullrich, Thomas ; Underwood, David G. ; Van Buren, Gene ; VanderMolen, A. M. ; Vanyashin, A. ; Vasilevski, I. M. ; Vasiliev, Alexander Nikolaevich ; Vigdor, Steven E. ; Voloshin, Sergei ; Wang, F. ; Ward, H. ; Wells, R. ; Wenaus, T. ; Westfall, Gary D. ; Whitten, Charles A. ; Wieman, Howard ; Willson, Robert ; Wissink, Scott W. ; Witt, Richard ; Xu, N. ; Xu, Z. ; Yakutin, A. E. ; Yamamoto, E. ; Yang, J. ; Yepes, Pablo P. ; Yokosawa, A. ; Yurevich, Vladimir Yurevich ; Zanevski, Y. V. ; Zhang, J. ; Zhang, W. M. ; Zoulkarneev, R. ; Zubarev, A. N.
Event-by-event fluctuations of particle ratios in central Pb + Pb collisions at 20 to 158 AGeV
(2004)
Roland, Christof ; Alt, Christopher ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blume, Christoph ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Cerny, Vladimír ; Christakoglou, Panagiotis ; Chvala, Ondrej ; Cramer, John G. ; Csató, Péter ; Darmenov, Nikolay ; Dimitrov, Anton ; Dinkelaker, Peter ; Eckardt, Volker ; Farantatos, Gerassimos ; Flierl, Dominik Bernhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz-Dziaduś, Ewa ; Grebieszkow, Katarzyna ; Hegyi, Sándor ; Höhne, Claudia ; Kadija, Krešo ; Karev, Alexandre ; Kliemant, Michael ; Kniege, Stefan ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kornaś, Ewelina ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Lungwitz, Benjamin ; Makariev, Martin Vasilev ; Malakhov, Aleksandr I. ; Markert, Christina ; Mateev, Matej D. ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Mrówczyński, Stanislaw ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Panayotov, Dobromir ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Roland, Gunther ; Richard, Agnes Carol Joanna ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Stefanek, Grzegorz ; 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 ; Włodarczyk, Zbigniew ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
In the vicinity of the QCD phase transition, critical fluctuations have been predicted to lead to non-statistical fluctuations of particle ratios, depending on the nature of the phase transition. Recent results of the NA49 energy scan program show a sharp maximum of the ratio of K+ to Pi+ yields in central Pb+Pb collisions at beam energies of 20-30 AGeV. This observation has been interpreted as an indication of a phase transition at low SPS energies. We present first results on event-by-event fluctuations of the kaon to pion and proton to pion ratios at beam energies close to this maximum.
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.
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, X. ; Draper, James E. ; Du, F. ; Dubey, Anand Kumar ; Dunin, V. B. ; Dunlop, James C. ; Majumdar, M. R. Dutta ; 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. ; Ganti, Murthy S. ; Gutierrez, Thomas Dominic ; Gagunashvili, N. ; Gans, J. ; 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. ; 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 ; Johnson, I. ; 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. ; Koetke, Donald D. ; 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. ; 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 ; Leontiev, V. M. ; 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, V. ; Moura, M. M. de ; 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. ; 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 ; VanderMolen, A. M. ; Vasiliev, Alexander Nikolaevich ; Vasiliev, M. ; Vigdor, Steven E. ; Viyogi, Yogendra P. ; Waggoner, William T. ; Wang, F. ; Wang, G. ; 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. ; Yakutin, A. E. ; Yamamoto, E. ; Yang, J. ; Yepes, Pablo P. ; Yurevich, Vladimir Yurevich ; Zanevski, Y. V. ; Zborovský, I. ; Zhang, Haitao ; Zhang, H. Y. ; Zhang, W. M. ; Zhang, Z. P. ; Żołnierczuk, Piotr Adam ; Zoulkarneev, R. ; Zoulkarneeva, J. ; Zubarev, A. N.
We present the first large-acceptance measurement of event-wise mean transverse momentum <pt> fluctuations for Au-Au collisions at nucleon-nucleon center-of-momentum collision energy sqrt[sNN] = 130 GeV. The observed nonstatistical <pt> fluctuations substantially exceed in magnitude fluctuations expected from the finite number of particles produced in a typical collision. The r.m.s. fractional width excess of the event-wise <pt> distribution is 13.7±0.1(stat) ±1.3(syst)% relative to a statistical reference, for the 15% most-central collisions and for charged hadrons within pseudorapidity range | eta |<1,2 pi azimuth, and 0.15 <= pt <= 2 GeV/c. The width excess varies smoothly but nonmonotonically with collision centrality and does not display rapid changes with centrality which might indicate the presence of critical fluctuations. The reported <pt> fluctuation excess is qualitatively larger than those observed at lower energies and differs markedly from theoretical expectations. Contributions to <pt> fluctuations from semihard parton scattering in the initial state and dissipation in the bulk colored medium are discussed.
Evidence for an exotic S=-2, Q=-2 baryon resonance in proton-proton collisions at the CERN SPS
(2004)
Alt, Christopher ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Betev, Latchezar ; Białkowska, Helena ; Billmeier, Anja ; Blume, Christoph ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Černý, Vladimír ; Christakoglou, Panagiotis ; Chvala, Ondrej ; Cramer, John G. ; Csató, Péter ; Darmenov, Nikolay ; Dimitrov, Anton ; Dinkelaker, Peter ; Eckardt, Volker ; Farantatos, Gerassimos ; 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 ; Kadija, Krešo ; Karev, Alexandre ; Kniege, Stefan ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Makariev, Martin Vasilev ; Malakhov, Aleksandr I. ; Markert, Christina ; Mateev, Matej D. ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Mrówczyński, Stanislaw ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Panayotov, Dobromir ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Stefanek, Grzegorz ; 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 ; Włodarczyk, Zbigniew ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimanyi, József
Results of resonance searches in the Xi - pi -, Xi - pi +, Xi -bar+ pi -, and Xi -bar+ pi + invariant mass spectra in proton-proton collisions at sqrt[s]=17.2 GeV are presented. Evidence is shown for the existence of a narrow Xi - pi - baryon resonance with mass of 1.862±0.002 GeV/c2 and width below the detector resolution of about 0.018 GeV/c2. The significance is estimated to be above 4.2 sigma . This state is a candidate for the hypothetical exotic Xi --3/2 baryon with S=-2, I=3 / 2, and a quark content of (dsdsu-bar). At the same mass, a peak is observed in the Xi - pi + spectrum which is a candidate for the Xi 03/2 member of this isospin quartet with a quark content of (dsusd-bar). The corresponding antibaryon spectra also show enhancements at the same invariant mass.
Adams, J. ; 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, X. ; 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 ; 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. ; Ganti, Murthy S. ; Gagunashvili, N. ; Gans, J. ; 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 ; Johnson, I. ; 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. ; Koetke, Donald D. ; 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. ; 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 ; Leontiev, V. M. ; 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, 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. ; 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 ; Rykov, Vladimir L. ; 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 ; VanderMolen, A. M. ; Vasiliev, Alexander Nikolaevich ; Vasiliev, M. ; Vigdor, Steven E. ; Viyogi, Yogendra P. ; Voloshin, Sergei ; Waggoner, William T. ; Wang, F. ; Wang, G. ; 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. ; Yakutin, A. E. ; Yamamoto, E. ; Yang, J. ; Yepes, Pablo P. ; Yurevich, Vladimir Yurevich ; Zanevski, Y. V. ; Zborovský, I. ; Zhang, Haitao ; Zhang, H. Y. ; Zhang, W. M. ; Zhang, Z. P. ; Żołnierczuk, Piotr Adam ; Zoulkarneev, R. ; Zoulkarneeva, J. ; Zubarev, A. N.
We report measurements of single-particle inclusive spectra and two-particle azimuthal distributions of charged hadrons at high transverse momentum (high pT) in minimum bias and central d+Au collisions at sqrt[sNN]=200 GeV. The inclusive yield is enhanced in d+Au collisions relative to binary-scaled p+p collisions, while the two-particle azimuthal distributions are very similar to those observed in p+p collisions. These results demonstrate that the strong suppression of the inclusive yield and back-to-back correlations at high pT previously observed in central Au+Au collisions are due to final-state interactions with the dense medium generated in such collisions.