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Dispersion-theoretical analysis of the electromagnetic form factors of the hyperon
Yong-Hui Lin, Hans-Werner Hammer, Ulf-G. Meißner
The electromagnetic form factors of the hyperon in the time-like region are determined precisely through a dispersion-theoretical analysis of the world data for the cross secti…
The electromagnetic Sigma-to-Lambda transition form factors with coupled-channel effects in the space-like region
Yong-Hui Lin, Hans-Werner Hammer, Ulf-G. Meißner
Using dispersion theory, the electromagnetic Sigma-to-Lambda transition form factors are expressed as the product of the pion electromagnetic form factor and the scat…
Differential Cross Section Predictions for PRad-II from Dispersion Theory
Yong-Hui Lin, Hans-Werner Hammer, Ulf-G. Meißner
We predict the differential cross sections for and elastic scattering in the PRad-\Rom{2} energy region. The prediction is based on form factors obtained in our previ…
New insights into the nucleon's electromagnetic structure
Yong-Hui Lin, Hans-Werner Hammer, Ulf-G. Meißner
We present a combined analysis of the electromagnetic form factors of the nucleon in the space- and timelike regions using dispersion theory. Our framework provides a consistent de…
An alternative scheme for effective range corrections in pionless EFT
M. Ebert, H. -W. Hammer, A. Rusetsky
We discuss an alternative scheme for including effective range corrections in pionless effective field theory. The standard approach treats range terms as perturbative insertions i…
Interpretation of neutral charm mesons near threshold as unparticles
Eric Braaten, Hans-Werner Hammer
The existence of the resonance extremely close to the threshold implies that neutral charm mesons have an approximate nonrelativistic conformal symmetr…