标题： 温伯格对核子-核子散射方法的重新考察 显示英文标题

标题： Weinberg's approach to nucleon-nucleon scattering revisited

摘要： 我们提出了一种新的、可重整化的核子-核子散射方法，该方法基于无须使用重子展开的显式洛伦兹不变的有效拉格朗日形式的手征有效场论。 对于无介子的情况以及基于微扰介子的表述，新方法再现了Kaplan、Savage和Wise获得的已知结果。 与使用重子展开的标准表述相反，非微扰重求和的一介子交换势可以通过将所有紫外发散吸收进主导的S波接触相互作用来实现重整化。 我们详细解释了与重子表述的不同之处，并给出了低动量展开中两个核子相移的数值结果。 显示英文摘要

摘要： We propose a new, renormalizable approach to nucleon-nucleon scattering in chiral effective field theory based on the manifestly Lorentz invariant form of the effective Lagrangian without employing the heavy-baryon expansion. For the pion-less case and for the formulation based on perturbative pions, the new approach reproduces the known results obtained by Kaplan, Savage and Wise. Contrary to the standard formulation utilizing the heavy-baryon expansion, the nonperturbatively resummed one-pion exchange potential can be renormalized by absorbing all ultraviolet divergences into the leading S-wave contact interactions. We explain in detail the differences to the heavy-baryon formulation and present numerical results for two-nucleon phase shifts at leading order in the low-momentum expansion.