Near-threshold production of the multistrange Xi- hyperon.

Near-threshold production of the multistrange Xi- hyperon.
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DOI：
10.1103/physrevlett.91.202301
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发表时间：
2003-02
期刊：
Physical review letters
影响因子：
8.6
通讯作者：
P. Chung;N. Ajitanand;J. Alexander;M. Anderson;D. Best;F. Brady;T. Case;W. Caskey;D. Cebra;J. Chance;B. Cole;K. Crowe;A. Das;J. Draper;M. Gilkes;S. Gushue;M. Heffner;A. Hirsch;E. Hjort;W. Holzmann;L. Huo;M. Issah;M. Justice;M. Kaplan;D. Keane;J. Kintner;J. Klay;D. Krofcheck;R. Lacey;J. Lauret;M. Lisa;Honghai Liu;Y. M. Liu;J. Milan;R. McGrath;Z. Milosevich;G. Odyniec;D. Olson;S. Panitkin;N. Porile;G. Rai;H. Ritter;J. Romero;R. Scharenberg;B. Srivastava;N. Stone;T. Symons;A. Taranenko;J. Whitfield;T. Wienold;R. Witt;L. Wood;Weigang Zhang;H. Oeschler
P. Chung;N. Ajitanand;J. Alexander;M. Anderson;D. Best;F. Brady;T. Case;W. Caskey;D. Cebra;J. Chance;B. Cole;K. Crowe;A. Das;J. Draper;M. Gilkes;S. Gushue;M. Heffner;A. Hirsch;E. Hjort;W. Holzmann;L. Huo;M. Issah;M. Justice;M. Kaplan;D. Keane;J. Kintner;J. Klay;D. Krofcheck;R. Lacey;J. Lauret;M. Lisa;Honghai Liu;Y. M. Liu;J. Milan;R. McGrath;Z. Milosevich;G. Odyniec;D. Olson;S. Panitkin;N. Porile;G. Rai;H. Ritter;J. Romero;R. Scharenberg;B. Srivastava;N. Stone;T. Symons;A. Taranenko;J. Whitfield;T. Wienold;R. Witt;L. Wood;Weigang Zhang;H. Oeschler
中科院分区：
物理与天体物理1区
文献类型：
--
作者：
P. Chung;N. Ajitanand;J. Alexander;M. Anderson;D. Best;F. Brady;T. Case;W. Caskey;D. Cebra;J. Chance;B. Cole;K. Crowe;A. Das;J. Draper;M. Gilkes;S. Gushue;M. Heffner;A. Hirsch;E. Hjort;W. Holzmann;L. Huo;M. Issah;M. Justice;M. Kaplan;D. Keane;J. Kintner;J. Klay;D. Krofcheck;R. Lacey;J. Lauret;M. Lisa;Honghai Liu;Y. M. Liu;J. Milan;R. McGrath;Z. Milosevich;G. Odyniec;D. Olson;S. Panitkin;N. Porile;G. Rai;H. Ritter;J. Romero;R. Scharenberg;B. Srivastava;N. Stone;T. Symons;A. Taranenko;J. Whitfield;T. Wienold;R. Witt;L. Wood;Weigang Zhang;H. Oeschler

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在6A GeV Au+Au碰撞中，通过重建其衰变产物π（-）和λ，测量了多奇异Xi（-）超子的产额，后者也是由π（-）和p的子轨道重建的。测量结果相当接近Xi（-）产生的阈值，因此为模型预测提供了一个重要的检验。对于几个中心性，比较Xi（-）和λ的测量产率。在中心碰撞的Xi（-）产量被发现是在统计和输运模型的预测非常一致，这表明多奇异强子的生产方法在高重子密度核物质的化学平衡。
The yield for the multistrange Xi(-) hyperon has been measured in 6A GeV Au+Au collisions via reconstruction of its decay products pi(-) and Lambda, the latter also being reconstructed from its daughter tracks of pi(-) and p. The measurement is rather close to the threshold for Xi(-) production and therefore provides an important test of model predictions. The measured yield for Xi(-) and Lambda are compared for several centralities. In central collisions the Xi(-) yield is found to be in excellent agreement with statistical and transport model predictions, suggesting that multistrange hadron production approaches chemical equilibrium in high baryon density nuclear matter.