WebbIn pionless EFT, the internucleon potential is expanded in derivatives of delta functions, or powers of momenta in momentum space. An important task in EFT is to provide a power counting for observables. One can show [5–8] that in pionless EFT observables can be written as expansions in Q/M hi, where Q denotes the generic external momenta of Webb10 juni 2024 · In summary, we presented the closed-form G matrix in S 0 1 channel obtained from BG equation using pionless EFT. Our experience here tells us that the nonperturbative solutions in our formulation are still tractable and trustworthy in many-body context, at least for nuclear matter.
1 2 3 arXiv:2304.03327v1 [nucl-th] 6 Apr 2024
Webb12 dec. 2024 · order in a pionless-EFT expansion that consist of contact terms between nucleons [36]. More specifically, we use the leading-order NN potential “o” of Ref. [31] that is designed to reproduce the npscattering lengths and effective radii in S/T = 0/1 and 1/0 channels. We assume the electromagnetic component of the NN potential to only ... demand externality
The Problem of Renormalization of Chiral Nuclear Forces
Webb16 dec. 2024 · Pionless EFT describes the interactions of individual nucleons at momenta small compared to the pion mass [4,5,6,7,8]. Apart from electroweak interactions, the … Webb10 apr. 2024 · Over the past few decades, a number of studies have also been performed in pionless EFT, which uses nucleons as the only dynamical degrees of freedom [15–20]. At energies relevant for astrophysics, the process lies well within the … Webb9 dec. 2012 · We use an effective field theory for short-range forces (SREFT) to analyze systems of three identical bosons interacting via a two-body potential that generates a scattering length, a, which is large compared to the range of the interaction, ℓ. The amplitude for the scattering of one boson off a bound state of the other two is computed … fewo calais