论文标题
B厅B中A = 3核的精确测量值
Precision measurements of A=3 nuclei in Hall B
论文作者
论文摘要
我们提出了几乎没有人体核结构的高统计量测量，并在6.6 GEV的准弹性散射中从$^2 $ h，$^3 $ h，$^3 $ he和$^3 $ h的目标与Clas12检测器一起进行。 我们将测量$（e，e'p）$和$（e，e'pn）$ quasi弹性反应通道的绝对横截面，直至缺少动量$ p_ {miss} \大约1 $ gev/c，范围内$ q^2 $ and $ q^2 $和$ x_b $，并构建Isscalar of Isscalar of isscalar of iSscalar of $^3 $ h和$ h和$ h和$^$ he he He he He。我们将使用多种技术和$ nn $互动来比较$（e，e'p）$交叉部分与核理论预测，以限制短距离的$ NN $相互作用。我们将测量$（e，e'pn）$ quasi弹性反应横截面和$（e，e'pn）/（e，e'p）$比率，以了解最简单的非琐事系统中的短距离相关（SRC）$ nn $对。 $^3 $ h和$^3 $ He，是镜子核，利用了最大可用的isospin不对称性。它们足够轻，可以容易计算其基础状态，但是它们已经表现出复杂的核行为，包括$ nn $ srcs。我们还将测量$^2 $ h $（e，e'p）$，以帮助理论家限制非质量反应机制，以便更好地计算$ a = 3 $ nuclei的反应。为了理解和最小化不同的反应效应，例如单电荷交换最终状态相互作用，以测试地面状态核模型，将所有三个身体核一起测量至关重要。 我们还将从$^3 $ he和$^3 $ h和$^3 $ h的包含$（e，e'）$ quasi弹性交叉部分（超过$ x_b $）和$^3 $ h的比率进行衡量的比率，以便以$ q^2 $的小额和中度值提取中子磁性元件$ g_m^n $。我们将在6.6 GEV和2.2 GEV下测量它。
We propose a high-statistics measurement of few body nuclear structure and short range correlations in quasi-elastic scattering at 6.6 GeV from $^2$H, $^3$He and $^3$H targets in Hall B with the CLAS12 detector. We will measure absolute cross sections for $(e,e'p)$ and $(e,e'pN)$ quasi-elastic reaction channels up to a missing momentum $p_{miss} \approx 1$ GeV/c over a wide range of $Q^2$ and $x_B$ and construct the isoscalar sum of $^3$H and $^3$He. We will compare $(e,e'p)$ cross sections to nuclear theory predictions using a wide variety of techniques and $NN$ interactions in order to constrain the $NN$ interaction at short distances. We will measure $(e,e'pN)$ quasi-elastic reaction cross sections and $(e,e'pN)/(e,e'p)$ ratios to understand short range correlated (SRC) $NN$ pairs in the simplest non-trivial system. $^3$H and $^3$He, being mirror nuclei, exploit the maximum available isospin asymmetry. They are light enough that their ground states are readily calculable, but they already exhibit complex nuclear behavior, including $NN$ SRCs. We will also measure $^2$H$(e,e'p)$ in order to help theorists constrain non-quasielastic reaction mechanisms in order to better calculate reactions on $A=3$ nuclei. Measuring all three few body nuclei together is critical, in order to understand and minimize different reaction effects, such as single charge exchange final state interactions, in order to test ground-state nuclear models. We will also measure the ratio of inclusive $(e,e')$ quasi-elastic cross sections (integrated over $x_B$) from $^3$He and $^3$H in order to extract the neutron magnetic form factor $G_M^n$ at small and moderate values of $Q^2$. We will measure this at both 6.6 GeV and 2.2 GeV.
