论文标题
纠正GSI-HADES和RHIC-BES ENERGIES的$ B_A $合并因子
Correcting the $B_A$ coalescence factor at GSI-HADES and RHIC-BES energies
论文作者
论文摘要
我们在低碰撞能量（$ \ sqrt {s_ \ mathrm {nn}} <6 $ gev）中调查了合并因子$ b_2 $和$ b_3 $，并特别关注Hades和Rhic-Bes实验。结果表明，为了正确解释$ b_a $的结合因子，必须使用两个重要的更正：i）必须使用分母中的质子$ \ times $中子产量来计算质子的中子产量，而不是质子产量的平方，而ii则必须使用原始蛋白质（中子）的浓度（并非最终）（未及时）（未及时）（未及时）。这两种效果都会在低能量下大幅降低$ b_2 $和$ b_3 $。这种降低减少了从HBT测量值提取的体积与从聚结因子提取的体积（$ v \ propto 1/b_2 $）之间的差异。当在Hades和低rhic-Bes能量这些校正是实质的时，它们在$ \ sqrt {s_ \ mathrm {nn}}}> 6 $ GEV上变得无关紧要。所提出的校正方法是独立的，仅基于质子，簇和带电亲的测量。
We investigate the coalescence factors $B_2$ and $B_3$ at low collision energies ($\sqrt{s_\mathrm{NN}}<6$ GeV) with special focus on the HADES and RHIC-BES experiments. It is shown that, in order to properly interpret the coalescence factors $B_A$, two important corrections are necessary: I) $B_2$ has to be calculated using the proton $\times$ neutron yields in the denominator, instead of the square of the proton yield, and II) the primordial proton (neutron) densities have to be used for the normalization and not the final state (free) protons (neutrons). Both effects lead to a drastic reduction of $B_2$ and $B_3$ at low energies. This reduction decreases the discrepancy between the volumes extracted from HBT measurements and the volumes extracted from the coalescence factor ($V\propto 1/B_2$). While at HADES and low RHIC-BES energies these corrections are substantial, they become irrelevant above $\sqrt{s_\mathrm{NN}}>6$ GeV. The proposed correction method is model independent and is only based on the measurement of protons, clusters and charged pions.
