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Language
- English (22)
Has Fulltext
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Is part of the Bibliography
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Keywords
- Charge fluctuations (1)
- QGP (1)
- Relativistic heavy-ion collisions (1)
Institute
- Physik (21)
Rybczyński, Maciej ; 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 ; Kornas, Ewelina ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Lungwitz, Benjamin ; Makariev, Martin ; 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 ; Richard, Agnes Carol Joanna ; Roland, Christof ; Roland, Gunther ; Rybicki, Andrzej ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Stefanek, Grzegorz ; Stock, Reinhard ; Ströbele, Herbert ; Susa, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Trubnikov, Victor ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wetzler, Alexander Albert ; Włodarczyk, Zbigniew ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimányi, József
System size dependence of multiplicity fluctuations of charged particles produced in nuclear collisions at 158 A GeV was studied in the NA49 CERN experiment. Results indicate a non-monotonic dependence of the scaled variance of the multiplicity distribution with a maximum for semi-peripheral Pb+Pb interactions with number of projectile participants of about 35. This effect is not observed in a string-hadronic model of nuclear collision HIJING.
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, 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 ; 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.
Report from NA49
(2004)
Gaździcki, Marek ; 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 ; Filip, Peter ; Flierl, Dominik Bernhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Georgopoulos, George ; Gładysz-Dziaduś, Ewa ; Grebieszkow, Katarzyna ; Hegyi, Sándor ; Höhne, Claudia ; Kadija, Krešo ; Karev, Alexandre ; Kliemant, Michael ; Kniege, Stefan ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kornas, Ewelina ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Lungwitz, Benjamin ; Makariev, Martin ; 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 ; Richard, Agnes Carol Joanna ; 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 ; Zimányi, József
The most recent data of NA49 on hadron production in nuclear collisions at CERN SPS energies are presented. Anomalies in the energy dependence of pion and kaon production in central Pb+Pb collisions are observed. They suggest that the onset of deconfinement is located at about 30 AGeV. Large multiplicity and transverse momentum fluctuations are measured for collisions of intermediate mass systems at 158 AGeV. The need for a new experimental programme at the CERN SPS is underlined.
Flierl, Dominik Bernhard ; 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 ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz, Ewa ; Grebieszkow, Katarzyna ; Hegyi, Sándor ; Höhne, Claudia ; Kadija, Krešo ; Karev, Alexandre ; Kliemant, Michael ; Kniege, Stefan ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kornas, Ewelina ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Lungwitz, Benjamin ; Makariev, Martin ; Malakhov, Aleksandr I. ; Markert, Christina ; Mateev, Matej D. ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Mrówczynski, Stanislaw ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Panayotov, Dobromir ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Richard, Agnes Carol Joanna ; 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. ; Trubnikov, Victor ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wetzler, Alexander Albert ; Włodarczyk, Zbigniew ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimanyi, József
The hadronic final state of central Pb+Pb collisions at 20, 30, 40, 80, and 158 AGeV has been measured by the CERN NA49 collaboration. The mean transverse mass of pions and kaons at midrapidity stays nearly constant in this energy range, whereas at lower energies, at the AGS, a steep increase with beam energy was measured. Compared to p+p collisions as well as to model calculations, anomalies in the energy dependence of pion and kaon production at lower SPS energies are observed. These findings can be explained, assuming that the energy density reached in central A+A collisions at lower SPS energies is sufficient to transform the hot and dense nuclear matter into a deconfined phase.
Flierl, Dominik Bernhard ; 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. ; Csato, Péter ; Darmenov, Nikolay ; Dimitrov, Anton ; Dinkelaker, Peter ; Eckardt, Volker ; Farantatos, Gerassimos ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gal, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz, Ewa ; Grebieszkow, Katarzyna ; Hegyi, Sándor ; Hohne, Claudia ; Kadija, Krešo ; Karev, Alexandre ; Kliemant, Michael ; Kniege, Stefan ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kornas, Ewelina ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Lungwitz, Benjamin ; Makariev, Martin ; Malakhov, Aleksandr I. ; Markert, Christina ; Mateev, Matej D. ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnar, József ; Mrowczynski, Stanislaw ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Panayotov, Dobromir ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence S. ; Puhlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Richard, Agnes Carol Joanna ; Roland, Christof ; Roland, Gunther ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Sikler, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Stefanek, Grzegorz ; Stock, Reinhard ; Ströbele, Herbert ; Šuša, Tatjana ; Szentpetery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Trubnikov, Victor ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wetzler, Alexander Albert ; Włodarczyk, Zbigniew ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimanyi, József
The hadronic final state of central Pb+Pb collisions at 20, 30, 40, 80, and 158 AGeV has been measured by the CERN NA49 collaboration. The mean transverse mass of pions and kaons at midrapidity stays nearly constant in this energy range, whereas at lower energies, at the AGS, a steep increase with beam energy was measured. Compared to p+p collisions as well as to model calculations, anomalies in the energy dependence of pion and kaon production at lower SPS energies are observed. These findings can be explained, assuming that the energy density reached in central A+A collisions at lower SPS energies is sufficient to force the hot and dense nuclear matter into a deconfined phase.
Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Behler, Matthias ; 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 ; 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 ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Kornas, Ewelina ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Makariev, Martin ; 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 ; Zimányi, József
Production of Lambda and Antilambda hyperons was measured in central Pb-Pb collisions at 40, 80, and 158 A GeV beam energy on a fixed target. Transverse mass spectra and rapidity distributions are given for all three energies. The Lambda/pi ratio at mid-rapidity and in full phase space shows a pronounced maximum between the highest AGS and 40 A GeV SPS energies, whereas the anti-Lambda}/pi ratio exhibits a monotonic increase. PACS numbers: 25.75.-q
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.
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 ; 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.
Alt, Christopher ; Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Behler, Matthias ; 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 ; Filip, Peter ; 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 ; Kornas, Ewelina ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Litov, Leandr ; Lungwitz, Benjamin ; Makariev, Martin ; 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 ; Richard, Agnes Carol Joanna ; 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 ; Zimányi, József
Results are presented on event-by-event electric charge fluctuations in central Pb+Pb collisions at 20, 30, 40, 80 and 158 AGeV. The observed fluctuations are close to those expected for a gas of pions correlated by global charge conservation only. These fluctuations are considerably larger than those calculated for an ideal gas of deconfined quarks and gluons. The present measurements do not necessarily exclude reduced fluctuations from a quark-gluon plasma because these might be masked by contributions from resonance decays.
Adams, John ; Aggarwal, Madan Mohan ; Ahammed, Zubayer ; Amonett, John ; Anderson, Bryon D. ; Arkhipkin, Dmitry A. ; Averichev, Georgy S. ; Bai, Yu ; Balewski, Jan ; Barannikova, Olga ; Barnby, Lee Stuart ; Baudot, Jérome ; Bekele, Selemon ; Belaga, Victoria Vladimirovna ; Bellwied, Rene ; Berger, Jens ; Bezverkhny, B. I. ; Bharadwaj, Somnath ; 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, Robert V. ; Cai, Xiang-Zhou ; Caines, Helen Louise ; Calderón de la Barca Sánchez, Manuel ; Carroll, J. ; Castillo Castellanos, Javier Ernesto ; Cebra, Daniel A. ; Chaloupka, Petr ; Chattopdhyay, S. ; Chen, H. F. ; Chen, Y. ; Cheng, J. ; Cherney, Michael Gerard ; Chikanian, Alexei ; Christie, William ; Coffin, Jean Pierre ; Cormier, Thomas Michael ; Cramer, John G. ; Crawford, Henry J. ; Das, Debasish ; Das, Supriya ; de Moura, M. M. ; 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 Mazumdar, M. R. ; Eckardt, Volker ; Edwards, W. R. ; Efimov, Leonid 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. ; Foley, K. J. ; Fomenko, K. ; Fu, J. ; Gagliardi, Carl A. ; Gans, J. ; Ganti, Murthy S. ; Gaudichet, L. ; Geurts, Frank ; Ghazikhanian, Vahe ; Ghosh, Premomoy ; Gonzalez, Johan Enmanuel ; Grachov, Oleg A. ; Grebenyuk, Oleksandr ; Grosnick, David P. ; Guertin, Steven M. ; Gupta, Anik ; Gutierrez, Thomas Dominic ; Hallman, Timothy J. ; Hamed, Ahmed M. ; Hardtke, David H. ; Harris, John W. ; Heinz, Mark Thomas ; Henry, Thomas W. ; Hepplemann, S. ; Hippolyte, Boris ; Hirsch, Andrew S. ; Hjort, Eric ; Hoffmann, Gerald W. ; Huang, Huan Zhong ; Huang, Shengli ; Hughes, Emlyn Willard ; Humanic, Thomas J. ; Igo, George J. ; Ishihara, A. ; Jacobs, Peter Martin ; Jacobs, William 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, Mikhail L. ; Kotchenda, L. ; Kramer, M. ; Kravtsov, Peter ; Kravtsov, Vladimir I. ; Krueger, Keith William ; Kuhn, Christian Claude ; Kulikov, Anatoly I. ; Kumar, Ajay ; Kunz, Christopher Lee ; Kutuev, R. Kh. ; Kuznetsov, A. A. ; Lamont, Matthew A. C. ; Landgraf, Jeffery M. ; Lange, S. ; Laue, Frank ; Lauret, Jerome ; Lebedev, Alexei ; Lednicky, Richard ; Lehocka, S. ; LeVine, Micheal J. ; Li, C. ; Li, Q. ; Li, Y. ; Lindenbaum, Sam J. ; Lisa, Michael A. ; Liu, F. ; Liu, L. ; Liu, Q. J. ; Liu, Z. ; Ljubicic, Tonko A. ; Llope, William Joseph ; Long, H. ; Longacre, Ronald S. ; Lopez-Noriega, M. ; Love, William A. ; Lu, Y. ; Ludlam, Thomas ; Lynn, David ; Ma, G. L. ; Ma, Jing-guo ; Ma, Yu-Gang ; 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, Tom S. ; Meissner, F. ; Melnick, Yu. ; Meščanin, Aleksei P. ; Miller, M. L. ; Milosevich, Z. ; Minaev, Nikolai G. ; Mironov, Camelia ; Mischke, André ; Mishra, Debadeepti ; Mitchell, J. ; Mohanty, Bedangadas ; Molnar, Levente ; Moore, C. F. ; Mora-Corral, M. J. ; Morozov, Dmitry A. ; Morozov, V. ; Munhoz, Marcelo Gameiro ; Nandi, Basanta Kumar ; Nayak, Tapan Kumar ; Nelson, John M. ; Netrakanti, Pawan Kumar ; 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. ; Pal, Susanta Kumar ; Panebratsev, Yuri ; Panitkin, Sergei Yurievich ; Pavlinov, A. I. ; Pawlak, Tomasz Jan ; Peitzmann, Thomas ; Perevoztchikov, Victor ; Perkins, Chris ; Peryt, Wiktor Stanislaw ; Petrov, V. A. ; Phatak, Shashikant C. ; Picha, R. ; Planinic, Mirko ; Pluta, Jan Marian ; Porile, Norbert T. ; Porter, Jeffrey Brent ; Poskanzer, Arthur M. ; Potekhin, Maxim ; Potrebenikova, E. ; Potukuchi, Baba 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. ; 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 ; Schroeder, Lee S. ; Schweda, Kai ; Seger, Janet Elizabeth ; Seyboth, Peter ; Shahaliev, Ehtiram ; Shao, M. ; Shao, W. ; Sharma, M. ; Shen, W. Q. ; Shestermanov, Konstantin E. ; Shimanskiy, S. S. ; Simon, F. ; Singaraju, Rama Narayana ; Skoro, Goran P. ; Smirnov, Nikolai ; Snellings, Raimond ; Sood, Gopika ; Sorensen, Paul Richard ; Sowinski, James ; Speltz, Jeff ; Spinka, Harold. M. ; Srivastava, Brijesh Kumar ; Stadnik, A. ; Stanislaus, T. D. Shirvel ; Stock, Reinhard ; Stolpovsky, Alexander ; Strichanov, Michail Nikolaevič ; Stringfellow, Blair ; 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 ; 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 ; Vander Molen, A. M. ; Varma, Raghava ; Vasilevski, I. M. ; Vasiliev, Alexander Nikolaevich ; Vernet, Renaud ; Vigdor, Steven E. ; Viyogi, Yogendra P. ; Vokal, Stanislav ; Vznuzdaev, Marat ; Waggoner, William T. ; Wang, F. ; Wang, G. ; Wang, G. ; Wang, X. L. ; Wang, Y. ; Wang, Y. ; Wang, Z. M. ; Ward, H. ; Watson, J. W. ; Webb, Jason C. ; Wells, R. ; Westfall, Gary D. ; Wetzler, Alexander Albert ; Whitten, Charles A. ; Wieman, Howard ; Wissink, Scott W. ; Witt, Richard ; Wood, J. ; Wu, J. ; Xu, N. ; Xu, Z. ; Xu, Z. ; Yamamoto, E. ; Yepes, Pablo P. ; Yurevich, Vladimir Yurevich ; Zanevsky, Yuri V. ; Zhang, Haitao ; Zhang, W. M. ; Zhang, Z. P. ; Zolnierczuk, Piotr Adam ; Zoulkarneev, R. ; Zoulkarneeva, Youlia ; Zubarev, A. N.
We present STAR measurements of charged hadron production as a function of centrality in Au+Au collisions at sqrt[sNN ]=130 GeV . The measurements cover a phase space region of 0.2< pT <6.0 GeV/c in transverse momentum and -1< eta <1 in pseudorapidity. Inclusive transverse momentum distributions of charged hadrons in the pseudorapidity region 0.5< | eta | <1 are reported and compared to our previously published results for | eta | <0.5 . No significant difference is seen for inclusive pT distributions of charged hadrons in these two pseudorapidity bins. We measured dN/d eta distributions and truncated mean pT in a region of pT > pcutT , and studied the results in the framework of participant and binary scaling. No clear evidence is observed for participant scaling of charged hadron yield in the measured pT region. The relative importance of hard scattering processes is investigated through binary scaling fraction of particle production.