723 citations · 4.2k across the 58 of their papers we have counts for
60 papers
Dilatons Improve (Non)-Goldstones
Roman Zwicky
Shift symmetry forbids conformal coupling of Goldstone bosons from internal symmetries, but not for spontaneously broken conformal symmetry. Its Goldstone boson, the dilaton , a…
QCD with an Infrared Fixed Point -- Pion Sector
Roman Zwicky
The possibility that gauge theories with chiral symmetry breaking below the conformal window exhibit an infrared fixed point is explored. With this assumption three aspects of pion…
Isospin Mass Differences of the , and
Matthew Rowe, Roman Zwicky
We compute the electromagnetic mass difference for the -, - and -mesons using QCD sum rules with double dispersion relations. For the - and -mesons we also compute t…
On the Theory Error
Saad Nabeebaccus, Roman Zwicky
To quantify the theory error on , essentially means to quantify the uncertainty due to QED corrections since the latter breaks lepton flavour universality through the lepton m…
Resolving Charged Hadrons in QED -- Gauge Invariant Interpolating Operators
Saad Nabeebaccus, Roman Zwicky
Standard interpolating operators for charged mesons, e.g. for , are not gauge invariant in QED and therefore problematic for perturbative methods. We…
Notes on QED Corrections in Weak Decays
Roman Zwicky
In these lecture notes the basics of QED corrections to hadronic decays are reviewed with special emphasis on conceptual (e.g. counting and tracking of infrared sensitive logs) rat…