论文标题
核子和$δ$共振的光学潜力的比较
Comparison of optical potential for nucleons and $Δ$ resonances
论文作者
论文摘要
中微子相互作用在核靶标上的精确建模对于中微子振荡实验至关重要。最终状态颗粒在绑定核子上的最终状态颗粒能量的建模需要了解初始状态结合核的去除能以及最终状态lepton和Hadron的平均库仑和核光学潜力。我们提取最终状态核子（$ u_ {opt}^{qe} $）核光学潜力的实际部分的平均值，这是核能动能的函数，该核能从核能上的电子散射数据（$ \ bf_ {$ \ bf_ {6}^{12}^{12} c $+$+$+$+$+\ bf_ {8}^$， $ \ bf_ {20}^{40} ca $+$ \ bf_ {18}^{40} ar $，$ \ bf_ {3}^{6} {6} li $，$ \ bf_ {18}^{18}^{27}^{27} al $ \ bf_ {82}^{208} pb $）在QE区域中，并与计算进行比较。我们还提取在脉冲近似中最终状态（$ u^δ_{opt} $）中$δ（1232）$共振的核光学电位的平均值的值。我们发现，$ u^δ_{opt} $与$ u_ {opt}^{qe} $带有$ u^δ__{opt} \ opt} \ of $ 1.5〜 $ 1.5〜 $ 1.5〜 $ u_ {opt}^{qe}^{qe} $ for $ \ bf_ {6}}^{12}^{12} c $。
Precise modeling of neutrino interactions on nuclear targets is essential for neutrino oscillations experiments. The modeling of the energy of final state particles in quasielastic (QE) scattering and resonance production on bound nucleons requires knowledge of both the removal energy of the initial state bound nucleon as well as the average Coulomb and nuclear optical potentials for final state leptons and hadrons. We extract the average values of the real part of the nuclear optical potential for final state nucleons ($U_{opt}^{QE}$) as a function of the nucleon kinetic energy from inclusive electron scattering data on nuclear targets ($\bf_{6}^{12}C$+$\bf_{8}^{16}O$, $\bf_{20}^{40}Ca$+$\bf_{18}^{40}Ar$, $\bf_{3}^{6}Li$, $\bf_{18}^{27}Al$, $\bf_{26}^{56}Fe$, $\bf_{82}^{208}Pb$) in the QE region and compare to calculations. We also extract values of the average of the real part of the nuclear optical potential for a $Δ(1232)$ resonance in the final state ($U^Δ_{opt}$) within the impulse approximation. We find that $U^Δ_{opt}$ is more negative than $U_{opt}^{QE}$ with $U^Δ_{opt}\approx$1.5~$U_{opt}^{QE}$ for $\bf_{6}^{12}C$.
