Charged-pion production in Au + Au collisions at √ s NN = 2 . 4 GeV
Charged-pion production in Au + Au collisions at √ s NN = 2 . 4 GeV
复制标题
Au + Au 碰撞中 √ s NN = 2.4 GeV 时带电介子的产生
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
P. Zumbruch
中科院分区：
文献类型：
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作者：
J. Adamczewski;O. Arnold;C. Behnke;A. Belounnas;A. Belyaev;J. Berger;A. Blanco;C. Blume;M. Böhmer;P. Bordalo;S. Chernenko;L. Chlad;I. Ciepał;C. Deveaux;J. Dreyer;E. Epple;L. Fabbietti;O. Fateev;P. Filip;P. Fonte;C. Franco;J. Friese;I. Fröhlich;T. Galatyuk;J. A. Garzón;R. Gernhäuser;S. Gläßel;M. Golubeva;R. Greifenhagen;F. Guber;M. Gumberidze;S. Harabasz;T. Heinz;T. Hennino;S. Hlavac;C. Höhne;R. Holzmann;A. Ierusalimov;A. Ivashkin;B. Kämpfer;T. Karavicheva;B. Kardan;I. Koenig;W. Koenig;M. Kohls;B. Kolb;G. Korcyl;G. Kornakov;F. Kornas;R. Kotte;A. Kugler;T. Kunz;A. Kurepin;A. Kurilkin;P. Kurilkin;V. Ladygin;R. Lalik;K. Lapidus;A. Lebedev;L. Lopes;M. Lorenz;T. Mahmoud;L. Maier;A. Malige;A. Mangiarotti;J. Markert;T. Matulewicz;S. Maurus;V. Metag;J. Michel;D. Mihaylov;S. Morozov;C. Müntz;R. Münzer;L. Naumann;K. Nowakowski;Y. Parpottas;V. Pechenov;O. Pechenova;O. Petukhov;K. Piasecki;J. Pietraszko;W. Przygoda;K. Pysz;S. Ramos;B. Ramstein;N. Rathod;A. Reshetin;P. Rodriguez;P. Rosier;A. Rost;A. Rustamov;A. Sadovsky;P. Salabura;T. Scheib;H. Schuldes;E. Schwab;F. Scozzi;F. Seck;P. Sellheim;I. Selyuzhenkov;J. Siebenson;L. Silva;U. Singh;J. Smyrski;Y. Sobolev;S. Spataro;S. Spies;H. Ströbele;J. Stroth;C. Sturm;O. Svoboda;M. Szala;P. Tlustý;M. Traxler;H. Tsertos;E. Usenko;V. Wagner;C. Wendisch;M. Wiebusch;J. Wirth;D. Wójcik;Y. Zanevsky;P. Zumbruch
我们给出了√S NN=2时Au+Au碰撞的带电π介子发射的高统计数据。4GeV(对应于E束=1。23A GeV)在最中心碰撞的0-40%范围内的四个中心-123城市类中。数据被分析为横向动量、横向质量、速度和极角的函数。每个参与核子的介子多重数随着中心度的增加而适度降低。即使对于最中心的事件类，极角分布也是非各向同性的。我们关于介子多重数fi的结果很好地符合现有世界数据的总体趋势，但比之前少了2。5来自theFOPIexperimentmeasuredatslightlylowerbeamenergy.的σ数据我们将我们的数据与最先进的输运模型计算(PHSD，IQMD，PHQMD，GiBUU和SMASH)和fi进行了比较，并发现测量结果与这些计算结果之间有很大的差异。
We present high-statistic data on charged-pion emission from Au+Au collisions at √ s NN = 2 . 4 GeV (corresponding to E beam = 1 . 23 A GeV) in four central-123 ity classes in the range 0–40% of the most central collisions. The data are analyzed as a function of transverse momentum, transverse mass, rapidity, and polar angle. Pion multiplicity per participating nucleon decreases moderately with increasing centrality. The polar angular distributions are found to be non-isotropic even for the most central event class. Our results on pion multiplicity fit well into the general trend of the available world data, but undershoot by 2 . 5 σ data from theFOPIexperimentmeasuredatslightlylowerbeamenergy. We compare our data to state-of-the-art transport model calculations (PHSD, IQMD, PHQMD, GiBUU and SMASH) and find substantial differences between the measurement and the results of these calculations.