深亚阈 φ 介子产生及其对 Au+Au 碰撞中 K+/K- 冻结的影响
核实验
2018-02-28 v2 高能物理 - 实验
摘要
我们展示了 Au(1.23A GeV)+Au 碰撞中带电 kaon (K+-) 和 φ 介子的数据。这是在动能束流能量低于 10A GeV 的中心重离子碰撞中首次同时测量 K 和 φ 介子。发现 φ/K- 多重数比率出奇地高，值为 0.52 ± 0.16，且未表现出对碰撞中心度的依赖性。因此，K+ 和 K- 横质量谱的不同斜率可以仅由馈入效应解释，该效应显著软化了 K- 介子的谱。由此，与文献中通常采用的论证相反，不同的斜率并不必然意味着由与重子不同耦合导致的 K+ 和 K- 介子的冻结温度不同。
引用
@article{arxiv.1703.08418,
title = {Deep sub-threshold {\phi} production and implications for the K+/K- freeze-out in Au+Au collisions},
author = {J. Adamczewski-Musch and O. Arnold and C. Behnke and A. Belounnas and A. Belyaev and J. C. Berger-Chen and J. Biernat and A. Blanco and C. Blume and M. Böhmer and P. Bordalo and S. Chernenko and L. Chlad and C. Deveaux and J. Dreyer and A. Dybczak and E. Epple and L. Fabbietti and O. Fateev and P. Filip and P. Fonte and C. Franco and J. Friese and I. Fröhlich and T. Galatyuk and J. A. Garzon and R. Gernhäuser and M. Golubeva and F. Guber and M. Gumberidze and S. Harabasz and T. Heinz and T. Hennino and S. Hlavac and C. Höhne and R. Holzmann and A. Ierusalimov and A. Ivashkin and B. Kämpfer and T. Karavicheva and B. Kardan and I. Koenig and W. Koenig and B. W. Kolb and G. Korcy and G. Kornakov and R. Kotte and W. Kühn and A. Kugler and T. Kunz and A. Kurepin and A. Kurilkin and P. Kurilkin and V. Ladygin and R. Lalik and K. Lapidus and A. Lebedev and L. Lopes and M. Lorenz and T. Mahmoud and L. Maier and A. Mangiarotti and J. Markert and S. Maurus and V. Metag and J. Michel and D. M. Mihaylov and S. Morozov and C. Müntz and R. Münzer and L. Naumann and K. N. Nowakowski and M. Palka and Y. Parpottas and V. Pechenov and O. Pechenova and O. Petukhov and J. Pietraszko and W. Przygoda and S. Ramos and B. Ramstein and A. Reshetin and P. Rodriguez-Ramos and P. Rosier and A. Rost and A. Sadovsky and P. Salabura and T. Scheib and H. Schuldes and E. Schwab and F. Scozzi and F. Seck and P. Sellheim and J. Siebenson and L. Silva and Yu. G. Sobolev and S. Spataro and H. Ströbele and J. Stroth and P. Strzempek and C. Sturm and O. Svoboda and M. Szala and P. Tlusty and M. Traxler and H. Tsertos and E. Usenko and V. Wagner and C. Wendisch and M. G. Wiebusch and J. Wirth and Y. Zanevsky and P. Zumbruch},
journal= {arXiv preprint arXiv:1703.08418},
year = {2018}
}
备注
Corrected and updated version, 28 November 2017