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8 papers · 2 filters
Neutron-antineutron oscillations in the deuteron studied with and interactions based on chiral effective field theory
Johann Haidenbauer, Ulf-G. Meißner
Neutron-antineutron () oscillations in the deuteron are considered. Specifically, the deuteron lifetime is calculated in terms of the free-space oscillation ti…
A New Theory Framework for the Electroweak Radiative Corrections in Decays
Chien-Yeah Seng, Daniel Galviz, Ulf-G. Meißner
We propose a new theory framework to study the electroweak radiative corrections in decays by combining the classic current algebra approach with the modern effective fiel…
Interpretation of the LHCb States as Hadronic Molecules and Hints of a Narrow
Meng-Lin Du, Vadim Baru, Feng-Kun Guo +4
Three hidden-charm pentaquark states, , , and were revealed in the process measured by LHCb using both run I and run II…
Isospin breaking decays as a diagnosis of the hadronic molecular structure of the
Feng-Kun Guo, Hao-Jie Jing, Ulf-G. Meißner +1
The LHCb Collaboration announced the observation of three narrow structures consistent with hidden-charm pentaquark states. They are candidates of hadronic molecules formed of a pa…
Flavor decomposition of the pion-nucleon -term
Daniel Severt, Ulf-G. Meißner, Jambul Gegelia
We re-analyze the flavor decomposition of the pion-nucleon -term in the framework of baryon chiral perturbation to fourth order. We employ a covariant and the heavy baryon frame…
Implications of chiral symmetry on -wave pionic resonances and the scalar charmed mesons
Meng-Lin Du, Feng-Kun Guo, Ulf-G. Meißner
The chiral symmetry of QCD requires energy-dependent pionic strong interactions at low energies. This constraint, however, is not fulfilled by the usual Breit--Wigner parameterizat…