论文标题
diquark诱导的短范围核子核子相关性\＆EMC效应
Diquark Induced Short-Range Nucleon-Nucleon Correlations \& the EMC Effect
论文作者
论文摘要
跨核子核子对的diquark形成被认为是核中短距离相关性（SRC）的基础QCD物理。 SRC对已被提出是核中夸克行为扭曲的原因。实验观察到的夸克动量分布扭曲称为EMC效应。 SRC对的强空间重叠会在核QCD电势范围内带来核子成分，而形成的任何键（例如diquark键）会影响其分布。在此SRC模型中，diquarks以$ \ rm 3_c \ otimes 3_c \ rightArrow \ bar {3} _c $ channel的$ \ rm su（3）_c $ Channel（3）_C $从高度重叠的核核电函数上作用于价夸克。最有利的diquark是一个核心的价$ u $ quark，其中一个nuce $ d $ quark是从一个旋转0状态，通过连续的单gluon交换和有吸引力的量子染色体动力学的短距离潜力。提议在NN对上形成新的标量isospin-singlet $ [ud] $ diquark，作为扭曲结构函数SRC模型的主要QCD级理论基础，以$ \ rm A \ geq 3 $核。较高的质量自旋-1 isospin Triplet的贡献是可能的，$（UU）$和$（dd）$是可能的，spin-1 $（ud）$ diquark提议作为较高的质量但可行的结构扭曲功能失真机制，用于spin-1 deuteron。对Lepton散射实验的预测是$ \ rm ^3h $和$ \ rm ^3he $核目标的预测，这对核函数中的3VARENCE Quark Fock状态的系数产生了影响。
Diquark formation across a short-range nucleon-nucleon pair is proposed as the underlying QCD physics of short-range correlations (SRC) in nuclei. SRC pairs have been proposed as the cause of distorted quark behavior in nuclei; experimentally observed quark momentum distribution distortions termed the EMC effect. The strong spatial overlap of SRC pairs brings nucleon constituents within range of inter-nucleon QCD potentials and any bonds formed - such as the diquark bond - affects their distributions. In this SRC model, diquarks form in the $\rm 3_C \otimes 3_C \rightarrow \bar{3}_C$ channel of $\rm SU(3)_C$ acting on valence quarks from highly overlapping nucleon wavefunctions. The most energetically favorable diquark is a valence $u$ quark from one nucleon with a valence $d$ quark from the other in a spin-0 state bound together via continual single gluon exchange and an attractive quantum chromodynamics short-range potential. Formation of a new scalar isospin-singlet $[ud]$ diquark across a NN pair is proposed as the primary QCD-level theoretical foundation for SRC models of distorted structure functions in $\rm A\geq 3$ nuclei. Contributions from the higher mass spin-1 isospin triplet states $(ud)$, $(uu)$ and $(dd)$ are possible, with the spin-1 $(ud)$ diquark proposed as a higher mass but viable structure function distortion mechanism for the spin-1 ground state deuteron. Predictions are made for lepton scattering experiments on $\rm ^3H$ and $\rm ^3He$ nuclear targets, with implications for the coefficients of the 3-valence quark Fock states in the nucleon wavefunction.
