Towards a Born term for hadrons
Towards a Born term for hadrons
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强子的诞生术语
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
M. Jarvinen
中科院分区：
文献类型：
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作者：
D. Dietrich;P. Hoyer;M. Jarvinen
在瞬时A 0场的高斯定律的解中，电势由边界条件确定。在狄拉克方程的情况下，相对论性费米子-反费米子（f f）波函数的范数给出了包含的粒子密度。然而，虽然狄拉克频谱是已知的是连续的，我们发现，定期f f解决方案只存在于离散的束缚态质量。的f f波函数是一致的部分子图片时，费米子的动能是大的结合势。我们验证了束缚态的电磁形状因子是规范不变的，并从Bjorken极限下的跃迁形状因子计算了部分子分布。对于相对论性的国家，我们发现一个大的海在低xBj的贡献。由于势与规范耦合无关，束缚态可以作为微扰展开中的玻恩项，类似于通常的平面波进出态。
potential is determined by a boundary condition in the solution of Gauss’ law for the instantaneous A 0 eld. As in the case of the Dirac equation, the norm of the relativistic fermion-antifermion (f f) wave functions gives inclusive particle densities. However, while the Dirac spectrum is known to be continuous we nd that regular f f solutions exist only for discrete bound-state masses. The f f wave functions are consistent with the parton picture when the kinetic energy of the fermions is large compared to the binding potential. We verify that the electromagnetic form factors of the bound states are gauge invariant and calculate the parton distributions from the transition form factors in the Bjorken limit. For relativistic states we nd a large sea contribution at low xBj. Since the potential is independent of the gauge coupling the bound states may serve as Born terms" in a perturbative expansion, in analogy to the usual plane wave in and out states.