论文标题
$δ$ CA+CA，Ni+Ni和Au+Au的共振从1 AgeV到2 AgeV：产量，质量转移和解耦温度之间的一致性
$Δ$ resonances in Ca+Ca, Ni+Ni and Au+Au reactions from 1 AGeV to 2 AGeV: Consistency between yields, mass shifts and decoupling temperatures
论文作者
论文摘要
超相关的量子分子动力学（URQMD）传输方法用于计算Ca+Ca，Ni+Ni和Au+Au+AU碰撞的$δ$（1232）的收益率在1 agev和2 agev之间。我们比较并验证两种不同的方法来提取这种低能核碰撞中$δ$（1232）的产量：首先，首先，使用$π^ - $ spectra在低$ p_ \ p_ \ m mathrm {t} $中用于推断$δ$（1232）在a+a碰撞中的$δ$（1232）收益率。其次，我们采用了Hades Collaboration使用的不变质量方法，该方法最近在$δ^{++} \rightarrowπ^++ p $通道中报道了数据。我们表明，这两种方法彼此兼容，并且与理论计算相兼容，表明新的Hades结果与先前的FOPI测量值兼容。然后，我们使用$Δ/核$比率来提取$δ$（1232）共振的动力学去耦温度。我们发现提取的温度与$δ$共振的预测质量转移以及根据互补研究估算的冻结参数的预测质量转移是一致的（Blast Wave FITS，粗透明）。
The Ultra-relativistic Quantum Molecular Dynamics (UrQMD) transport approach is used to calculate $Δ$(1232) yields in Ca+Ca, Ni+Ni and Au+Au collisions between 1 AGeV and 2 AGeV. We compare and validate two different methods to extract the yields of $Δ$(1232) resonances in such low energy nuclear collisions: Firstly, the $π^-$ spectra at low $p_\mathrm{T}$ are used to infer the $Δ$(1232) yield in A+A collisions, a method employed by the GSI/FOPI experiment. Secondly, we employ the invariant mass method used by the HADES collaboration, which has recently reported data in the $Δ^{++}\rightarrowπ^++p$ channel. We show that both methods are compatible with each other and with the theoretical calculations, indicating that the new HADES results are compatible with the previous FOPI measurements. Then we use the $Δ/nucleon$ ratio to extract the kinetic decoupling temperatures of the $Δ$(1232) resonances. We find that the extracted temperatures are consistent with the predicted mass shift of the $Δ$ resonance and the freeze-out parameters estimated from complementary studies (blast wave fits, coarse graining).
