论文标题
最终态核和核子加乳蛋白的核能
Nuclear Potential of Final State Nucleons and Nucleons Plus Pions in Lepton Nucleus Scattering
论文作者
论文摘要
在脉冲近似中，电子和中微子准循环中最终状态钩子的能量在$δ$共振区域的核靶标上的核酸和锥形生产过程的建模取决于多个参数。这些参数包括从原子核$ε^{p，n} $中的去除能量，电子，核和酸的电势和核核的电位$ | v_ {eff} | $，以及最终状态核的基因核能（$ u^{qe} $} $} $δ$共振的区域，我们称为$ u^δ_{opt} $。我们从电子散射数据中提取这些参数。 先前的研究表明，核子中的核子的实际部分的实际部分是$ _ {6}^{12} c $，零动能$ u^{p，n} _ {opt}（t = 0）\ opt $δ$（1232）resonance $ u^u^Δ__};我们发现在较高的动能处的反向。例如，在t = 100 meV时，我们找到一个核子电位$ u^{p，n} _ {opt}（t = 100 meV）$ = 20 $ \ pm $ 5 meV和$ u^δ__{opt}（t = 100 mev）$ = 30 $ \ pm $ 5 mev。这两个结果是一致的，原因有两个。首先，从理论上讲，$δ$电位的动能依赖性比核子的动能依赖性是平坦的。其次，在我们的分析中，提取的$ u^δ_{opt} $值是{\ it“ nucleon plus pion”}最终状态的核潜力，因此在$δ$共振的区域中，包括共振和非共振和非共振生产过程的贡献。对于仅包括费米运动和核电位的影响的蒙特卡洛发生器，相关参数是“核子加乳子”最终状态的有效核电位。
Within the impulse approximation, the modeling of the energy of final state leptons in electron and neutrino quasielastic and pion production processes on nuclear targets in the region of the $Δ$ resonance depends on several parameters. These parameters include the removal energy of the initial state nucleon from the nucleus $ε^{P,N}$, the potentials of electrons, nucleons and pions in the Coulomb field of the nucleus $|V_{eff}|$, and the kinetic energy dependent nuclear potential for final state nucleons ($U^{QE}_{opt}$) and "nucleon plus pion" final states in the region of the $Δ$ resonance which we refer to as $U^Δ_{opt}$. We extract these parameters from electron scattering data. Previous studies have shown that real part of the optical potential for a nucleon bound in $_{6}^{12}C$ at zero kinetic energy $U^{P,N}_{opt}(T=0)\approx$ 44 MeV is larger than that for the $Δ$(1232) resonance $U^Δ_{opt}(T=0)\approx$ 30 MeV. We find the reverse at higher kinetic energies. For example at T=100 MeV we find a nucleon potential $U^{P,N}_{opt}(T=100 MeV)$=20$\pm$5 MeV and $U^Δ_{opt}(T=100 MeV)$= 30$\pm$5 MeV. The two results are consistent for two reasons. First, theoretically the kinetic energy dependence of the $Δ$ potential is flatter than that of the nucleon. Secondly, in our analysis the extracted $U^Δ_{opt}$ values are the nuclear potential for {\it"nucleon plus pion"} final states in the region of the $Δ$ resonances and therefore includes contributions from both resonance and non resonance pion production processes. For Monte Carlo generators that only include the effects of Fermi motion and nuclear potentials, the relevant parameter is the effective nuclear potential for the "nucleon plus pion" final state.
