177 citations · 869 across the 23 of their papers we have counts for
10 papers · 1 filter
Lüscher equation with long-range forces
Rishabh Bubna, Hans-Werner Hammer, Fabian Müller +3
We derive the modified Lüscher equation in the presence of the long-range force caused by the exchange of a light particle. It is shown that the use of this equation enables one to…
Lellouch-Lüscher factor for the decays
Jin-Yi Pang, Rishabh Bubna, Fabian Müller +2
We derive an explicit expression for the Lellouch-Lüscher (LL) factor in the decays at leading order (without derivative couplings). Several important technical details a…
Three-particle Lellouch-Lüscher formalism in moving frames
Fabian Müller, Jin-Yi Pang, Akaki Rusetsky +1
A manifestly relativistic-invariant Lellouch-Lüscher formalism for the three-particle decays is proposed. Similarly to ref.[1], the formalism is based on the use of the non-relativ…
Spurious poles in a finite volume
Jin-Yi Pang, Martin Ebert, Hans-Werner Hammer +3
Using effective-range expansion for the two-body amplitudes may generate spurious sub-threshold poles outside of the convergence range of the expansion. In the infinite volume, the…
Relativistic-invariant formulation of the NREFT three-particle quantization condition
Fabian Müller, Jin-Yi Pang, Akaki Rusetsky +1
A three-particle quantization condition on the lattice is written down in a manifestly relativistic-invariant form by using a generalization of the non-relativistic effective field…
system in finite volume
Jin-Yi Pang, Jia-Jun Wu, Li-Sheng Geng
The 3-body system is supposed to be bound due to the strongly attractive interaction between the meson and the meson in the isospin zero channel. The minimum quark co…
Energy shift of the three-particle system in a finite volume
Jin-Yi Pang, Jia-Jun Wu, H. -W. Hammer +2
Using the three-particle quantization condition recently obtained in the particle-dimer framework, the finite-volume energy shift of the two lowest three-particle scattering states…
Three-body spectrum in a finite volume: the role of cubic symmetry
M. Döring, H. -W. Hammer, M. Mai +3
The three-particle quantization condition is partially diagonalized in the center-of-mass frame by using cubic symmetry on the lattice. To this end, instead of spherical harmonics,…
Three particle quantization condition in a finite volume: 2. general formalism and the analysis of data
H. -W. Hammer, J. -Y. Pang, A. Rusetsky
We derive the three-body quantization condition in a finite volume using an effective field theory in the particle-dimer picture. Moreover, we consider the extraction of physical o…
Three-particle quantization condition in a finite volume: 1. The role of the three-particle force
H. -W. Hammer, J. -Y. Pang, A. Rusetsky
Using non-relativistic effective Lagrangians in the particle-dimer picture, we rederive the expression for the energy shift of a loosely bound three-particle bound state of identic…