82 citations · 169 across the 7 of their papers we have counts for
7 papers
Electromagnetic form factors of the transition from the Delta to the nucleon
Moh Moh Aung, Stefan Leupold, Elisabetta Perotti +1
The low-energy electromagnetic form factors of the (1232)-to-nucleon transition are derived combining dispersion theory techniques and chiral perturbation theory. The form facto…
The electromagnetic form factors of the transition from the spin-3/2 Sigma to the Lambda hyperon
Olov Junker, Stefan Leupold, Elisabetta Perotti +1
The three electromagnetic form factors for the transition from a 3/2+ Sigma* hyperon to the ground-state Lambda hyperon are studied. At low energies, combinations of the transition…
Polarization observables in annihilation to a baryon-antibaryon pair
Elisabetta Perotti, Göran Fäldt, Andrzej Kupść +2
Using the helicity formalism of Jacob and Wick we derive spin density matrices of baryon antibaryon pairs produced in annihilation. We consider the production of pairs wit…
Extraction of Polarization Parameters in the Reaction
Elisabetta Perotti
A method to extract the polarization of hyperons produced via the strong interaction is presented. Assuming they are spin 3/2 particles, the corresponding spin density matrix c…
Constraining P and CP violation in the main decay of the neutral Sigma hyperon
Shankar Sunil Nair, Elisabetta Perotti, Stefan Leupold
On general grounds based on quantum field theory the decay amplitude for consists of a parity conserving magnetic and a parity violating electric dipole transition mom…
The electromagnetic Sigma-to-Lambda hyperon transition form factors at low energies
Carlos Granados, Stefan Leupold, Elisabetta Perotti
Using dispersion theory the low-energy electromagnetic form factors for the transition of a Sigma to a Lambda hyperon are related to the pion vector form factor. The additionally r…
Lifetime of the eta' meson at low temperature
E. Perotti, C. Niblaeus, S. Leupold
This work constitutes one part of an investigation of the low-temperature changes of the properties of the eta' meson. In turn these properties are strongly tied to the U(1)_A anom…