玻恩能级的相对论束缚态
Relativistic bound states at Born level
摘要：
理论和唯象研究表明，QCD耦合α_s（Q^2）在红外区冻结。强子可以用围绕仅受限制势约束的“玻恩”态的微扰膨胀来描述。以F_{μν} ^a F^{μν}_a \neq 0为边界条件，求解A^0的高斯定律，由QCD运动方程得到线性势。\order{α_s^0}玻恩态是庞加莱协变的，可以作为散射振幅的\ket{in}和\bra{out}态。它们的Dirac型波函数包括f \bar f产生/湮灭效应，在低x_bj时产生海状部分子。
英文摘要：
Theoretical and phenomenological studies indicate that the QCD coupling α_s(Q^2) freezes in the infrared. Hadrons may then be described by a perturbative expansion around "Born" states bound only by a confining potential. A linear potential results from the QCD equations of motion when Gauss' law for A^0 is solved with F_{μν}^a F^{μν}_a \neq 0 as boundary condition. The \order{α_s^0} Born states are Poincaré covariant and can serve as \ket{in} and \bra{out} states of scattering amplitudes. Their Dirac-type wave functions include f\bar f creation/annihilation effects giving sea-like partons at low x_bj.
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