核子部分子修正的短程关联标度：一致性检验与反冲标记粲产生深度非弹性散射
Short-Range Correlation Scaling of Nuclear Parton Modifications: Consistency Tests and Recoil-Tagged Charm-Production DIS
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中文总结 AI 辅助
本研究通过nCTEQ丰度与EPPS21胶子分布验证核胶子修正的SRC标度，并提出反冲标记粲产生DIS以检验SRC构型与标度的关联。
中文摘要 AI 辅助
我们利用nCTEQ短程关联丰度和EPPS21胶子分布，研究了核胶子修正的短程关联（SRC）标度。将EPPS21中心修正按这些丰度重新标度后，在$Q^2=10$和$100\\,\mathrm{GeV}^2$下，$0.1\leq x\leq0.4$区间内，从碳到铅的六种核子得到了近似共同的曲线。拟合丰度与变分蒙特卡洛计算得到的高动量质子份额之间的广泛一致性，支持了SRC解释。利用碳中约$20\\%$的SRC质子份额，测得的EMC-SRC关联也给出了纯SRC EMC斜率为$1.94\pm0.12$，与nCTEQ估计值$2.02\pm0.20$一致。为检验该标度与SRC构型之间的联系，我们提出了氘核深度非弹性散射（DIS）中的反冲标记粲产生方案，将后向高动量质子标记与胶子敏感硬过程相结合。我们通过扩展的断裂函数建立了领先幂次共线因子化，在平面波冲量近似下，该因子化可约化为氘核光前谱因子乘以反冲条件下的中子胶子分布。标记粲约化截面及其与包含标记的DIS之比，为在SRC富集构型中比较胶子修正与从包含性核部分子分布函数（nPDF）推断的标度提供了互补观测量。
英文摘要
We investigate short-range correlation (SRC) scaling of nuclear gluon modifications using nCTEQ SRC abundances and EPPS21 gluon distributions. Rescaling the EPPS21 central modifications by these abundances yields an approximately common curve for six nuclei from carbon to lead over $0.1\leq x\leq0.4$ at $Q^2=10$ and $100\,\mathrm{GeV}^2$. The SRC interpretation is supported by the broad agreement between the fitted abundances and high-momentum proton fractions from variational Monte Carlo calculations. Using an SRC proton fraction of approximately $20\%$ in carbon, the measured EMC-SRC correlation also gives a pure-SRC EMC slope of $1.94\pm0.12$, consistent with the nCTEQ estimate $2.02\pm0.20$. To test the connection between this scaling and SRC configurations, we propose recoil-tagged charm-production in deuteron deep-inelastic scattering (DIS), combining a backward high-momentum proton tag with a gluon-sensitive hard process. We formulate leading-power collinear factorization through an extended fracture function, which reduces within the plane-wave impulse approximation to a deuteron light-front spectral factor times a recoil-conditioned neutron gluon distribution. The tagged charm reduced cross section and its ratio to inclusive tagged DIS provide complementary observables for comparing gluon modifications in SRC-enriched configurations with the scaling inferred from inclusive nPDFs.
发表机构
- Lanzhou University（兰州大学）
- Shanghai Jiao Tong University（上海交通大学）
- Institute of Modern Physics, Chinese Academy of Sciences（中国科学院近代物理研究所）
- Tianjin University（天津大学）
机构由 AI 辅助整理，请以论文原文为准。
