担心
发表于 2025-3-26 23:33:22
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Omnipotent
发表于 2025-3-27 01:23:33
Threshold Expansion. Two Masses in the Threshold,rd, soft, potential and ultrasoft, for the threshold expansion. Then general prescriptions are formulated and subtle points about their application are explained. We continue, in Sect. 7.3, with examples of two-loop diagrams for which analytic results are unknown.
沙草纸
发表于 2025-3-27 06:18:14
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值得尊敬
发表于 2025-3-27 12:37:18
Book 2002nsense/ There‘s only one degree of freshness the first, and it‘s the last) (M. A. Bulgakov, The Master and Margarita) The goal of this book is to describe in detail how Feynman integrals can be expanded in suitable parameters, when various momenta or masses are small or large. In a narrow sense, thi
懒惰人民
发表于 2025-3-27 15:04:38
Trends in EU Energy Policy 1995–2007rd, soft, potential and ultrasoft, for the threshold expansion. Then general prescriptions are formulated and subtle points about their application are explained. We continue, in Sect. 7.3, with examples of two-loop diagrams for which analytic results are unknown.
效果
发表于 2025-3-27 21:01:10
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施加
发表于 2025-3-27 22:46:01
0081-3869 ‘"Second grade fresh" that‘s what I call nonsense/ There‘s only one degree of freshness the first, and it‘s the last) (M. A. Bulgakov, The Master and Margarita) The goal of this book is to describe in detail how Feynman integrals can be expanded in suitable parameters, when various momenta or masses
吞吞吐吐
发表于 2025-3-28 02:10:35
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myalgia
发表于 2025-3-28 09:45:59
Energy, Regional Science and Public Policye of the momentum transfer . . ≡ −(. . − . .). is large compared with the masses, and, for the four-point amplitudes, the Mandelstam variables . = (. . + . .)., . = (. . − . .). are larger than the masses. In the latter case, one has . = −.(1 − cos.)/2 in the centre-of-mass frame, so that this limit is connected with scattering at fixed angles.
medieval
发表于 2025-3-28 13:36:09
Threshold Expansion. One Heavy Mass in the Threshold,hold. As is well known, thresholds are located at . . = (Σ . .)., where . is the sum of the external momenta flowing through a cut in a diagram, and the . . are the masses of the lines in the cut. We shall consider two kinds of such threshold limits: