229 citations · 5.1k across the 117 of their papers we have counts for
119 papers
Effective Field Theory of Protonium
Hans-Werner Hammer, Akaki Rusetsky
We investigate the level shifts in protonium using the framework of non-relativistic effective field theory (NREFT). Our study is prompted by the PUMA collaboration's plans to prob…
Form factors of the -meson in chiral perturbation theory
Kakha Shamanauri, Jambul Gegelia, Ulf-G. Meißner +1
We present the calculation of the electromagnetic form factors of the -meson at one loop in Chiral Perturbation Theory. The power-counting-violating terms in the loop diagrams a…
Form factors of the meson from effective field theory and the lattice
Ulf-G. Meißner, Akaki Rusetsky, Ajay S. Sakthivasan +2
The calculation of resonance form factors in effective field theory as well as on the lattice is a highly challenging task. In a recent paper, we proposed a novel method based on t…
Modified Lüscher zeta-function and the modified effective range expansion in the presence of a long-range force
Rishabh Bubna, Hans-Werner Hammer, Bai-Long Hoid +3
An efficient numerical algoritm is proposed for the calculation of the modified Lüscher zeta-function in the presence of a long-range force. Using the formalism developed in Ref.~\…
Exploring Efimov states in and three-body systems
Hai-Long Fu, Yong-Hui Lin, Feng-Kun Guo +4
The Efimov effect is an intriguing three-body quantum phenomenon. Searching for Efimov states within the realms of nuclear and hadronic physics presents a challenge due to the inhe…
Finite-volume effects in the -regime
Ulf-G. Meißner, Fabian Müller, Akaki Rusetsky
We derive a systematic perturbative expansion for the finite-volume energy spectrum of the non-linear -model in the -regime. The violation of the power-counting rules…