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Local spatial densities for composite spin-3/2 systems
H. Alharazin, B. -D. Sun, E. Epelbaum +2
The definition of local spatial densities by using sharply localized one-particle states is applied to spin-3/2 systems. Matrix elements of the electromagnetic current and the ener…
Definition of gravitational local spatial densities for spin-0 and spin-1/2 systems
J. Yu. Panteleeva, E. Epelbaum, J. Gegelia +1
We work out details of defining the spatial densities corresponding to the gravitational form factors of spin-0 and spin-1/2 systems using spherically symmetric sharply localized w…
On the emergence of heavy quark spin symmetry breaking in heavy quarkonium decays
V. Baru, E. Epelbaum, A. A. Filin +2
Heavy-quark spin symmetry (HQSS) implies that in the direct decay of a heavy quarkonium with spin , only lower lying heavy quarkonia with the same spin can be produced. Howe…
Is the "RG-invariant EFT'' for few-nucleon systems cutoff independent?
A. M. Gasparyan, E. Epelbaum
We consider nucleon-nucleon scattering using the formulation of chiral effective field theory which is claimed to be renormalization group invariant. The cornerstone of this framew…
Gravitational form factors of the delta resonance in chiral EFT
H. Alharazin, E. Epelbaum, J. Gegelia +2
The leading one-loop corrections to the gravitational form factors of the delta resonance are calculated in the framework of chiral effective field theory. Various contributions to…
Wavefunction matching for solving quantum many-body problems
Serdar Elhatisari, Lukas Bovermann, Yuanzhuo Ma +15
Ab initio calculations play an essential role in our fundamental understanding of quantum many-body systems across many subfields, from strongly correlated fermions to quantum chem…