arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2409.07685hep-phnucl-th
收藏

实现宏观高重子密度物质的最佳碰撞能量范围

Optimal collision-energy range for realizing macroscopic high-baryon-density matter

Hidetoshi Taya, Asanosuke Jinno, Masakiyo Kitazawa, Yasushi Nara

AI总结:

利用JAM模型模拟金离子中心碰撞,发现$\sqrt{s_{NN}}=3-5\\;{\rm GeV}$最适合在大时空体积中产生三倍核密度以上的高重子密度物质,并强调逐事件涨落与事件选择的重要性。

摘要:

我们研究了重离子碰撞中产生的高重子密度物质的体积和寿命,并估计了在大时空体积上实现高重子密度区域的最佳碰撞能量范围。我们使用微观输运模型JAM模拟了金离子在每核子对质心系能量$\sqrt{s_{NN}}=2.4-19.6\\;{\rm GeV}$下的中心碰撞。我们发现最佳范围约为$\sqrt{s_{NN}}=3-5\\;{\rm GeV}$,在此范围内可实现超过正常核密度三倍的重子密度,并具有相当大的时空体积。更高和更低的能量分别由于寿命短和密度低而不受青睐。我们还指出,时空密度分布的逐事件涨落很大,表明在实验分析中进行事件选择的重要性。

英文摘要:

We investigate the volume and lifetime of the high baryon-density matter created in heavy-ion collisions and estimate the optimal collision-energy range to realize the high baryon-density region over a large spacetime volume. We simulate central collisions of gold ions for the center-of-mass energy per nucleon pair $\sqrt{s_{NN}}=2.4 - 19.6\;{\rm GeV}$ with a microscopic transport model JAM. We discover that the optimal range is around $\sqrt{s_{NN}}=3 - 5\;{\rm GeV}$, where a baryon density exceeding three times the normal nuclear density is realized with a substantially large spacetime volume. Higher and lower energies are disfavored due to short lifetime and low density, respectively. We also point out that event-by-event fluctuations of the spacetime density profile are large, indicating the importance of the event selection in the experimental analysis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑